Oral Contraceptive
LorynaTM (drospirenone and ethinyl estradiol tablets) is indicated for use by women to prevent pregnancy.
Acne
LorynaTM tablets are indicated for the treatment of moderate acne vulgaris in women at least 14 years of age, who have no known contraindications to oral contraceptive therapy and have achieved menarche. Drospirenone and ethinyl estradiol tablets should be used for the treatment of acne only if the patient desires an oral contraceptive for birth control.
Loryna Dosage and Administration
How to Take LorynaTM (drospirenone and ethinyl estradiol tablets)
Take one tablet by mouth at the same time every day. The failure rate may increase when pills are missed or taken incorrectly.
To achieve maximum contraceptive effectiveness, drospirenone and ethinyl estradiol tablets must be taken exactly as directed. Single missed pills should be taken as soon as remembered.
How to Start LorynaTM (drospirenone and ethinyl estradiol tablets)
Instruct the patient to begin taking LorynaTM tablets either on the first day of her menstrual period (Day 1 Start) or on the first Sunday after the onset of her menstrual period (Sunday Start).
Day 1 Start
During the first cycle of LorynaTM tablets use, instruct the patient to take one peach drospirenone and ethinyl estradiol tablet daily, beginning on Day one (1) of her menstrual cycle. (The first day of menstruation is Day one.) She should take one peach LorynaTM tablets daily for 24 consecutive days, followed by one white inert tablet daily on days 25 through 28. LorynaTM tablets should be taken in the order directed on the package at the same time each day, preferably after the evening meal or at bedtime with some liquid, as needed. LorynaTM tablets can be taken without regard to meals. If drospirenone and ethinyl estradiol tablets is first taken later than the first day of the menstrual cycle, LorynaTM tablets should not be considered effective as a contraceptive until after the first 7 consecutive days of product administration. Instruct the patient to use a non-hormonal contraceptive as back-up during the first 7 days. The possibility of ovulation and conception prior to initiation of medication should be considered.
Sunday Start
During the first cycle of LorynaTM tablets use, instruct the patient to take one peach LorynaTM tablets daily, beginning on the first Sunday after the onset of her menstrual period. She should take one peach LorynaTM tablets daily for 24 consecutive days, followed by one white inert tablet daily on days 25 through 28. LorynaTM tablets should be taken in the order directed on the package at the same time each day, preferably after the evening meal or at bedtime with some liquid, as needed. LorynaTM tablets can be taken without regard to meals. LorynaTM tablets should not be considered effective as a contraceptive until after the first 7 consecutive days of product administration. Instruct the patient to use a non-hormonal contraceptive as back-up during the first 7 days. The possibility of ovulation and conception prior to initiation of medication should be considered.
The patient should begin her next and all subsequent 28-day regimens of LorynaTM tablets on the same day of the week that she began her first regimen, following the same schedule. She should begin taking her peach tablets on the next day after ingestion of the last white tablet, regardless of whether or not a menstrual period has occurred or is still in progress. Anytime a subsequent cycle of LorynaTM tablets are started later than the day following administration of the last white tablet, the patient should use another method of contraception until she has taken a peach LorynaTM tablets daily for seven consecutive days.
When switching from a different birth control pill
When switching from another birth control pill, LorynaTM tablets should be started on the same day that a new pack of the previous oral contraceptive would have been started.
When switching from a method other than a birth control pill
When switching from a transdermal patch or vaginal ring, LorynaTM tablets should be started when the next application would have been due. When switching from an injection, LorynaTM tablets should be started when the next dose would have been due. When switching from an intrauterine contraceptive or an implant, LorynaTM tablets should be started on the day of removal.
Withdrawal bleeding usually occurs within 3 days following the last peach tablet. If spotting or breakthrough bleeding occurs while taking LorynaTM tablets, instruct the patient to continue taking her LorynaTM tablets by the regimen described above. Counsel her that this type of bleeding is usually transient and without significance; however, advise her that if the bleeding is persistent or prolonged, she should consult her healthcare provider.
Although the occurrence of pregnancy is low if LorynaTM tablets are taken according to directions, if withdrawal bleeding does not occur, consider the possibility of pregnancy. If the patient has not adhered to the prescribed dosing schedule (missed one or more active tablets or started taking them on a day later than she should have), consider the possibility of pregnancy at the time of the first missed period and take appropriate diagnostic measures. If the patient has adhered to the prescribed regimen and misses two consecutive periods, rule out pregnancy. Discontinue LorynaTM tablets if pregnancy is confirmed.
The risk of pregnancy increases with each active peach tablet missed. For additional patient instructions regarding missed pills, see the "WHAT TO DO IF YOU MISS PILLS" section in the FDA Approved Patient Labeling which follows. If breakthrough bleeding occurs following missed tablets, it will usually be transient and of no consequence. If the patient misses one or more white tablets, she should still be protected against pregnancy provided she begins taking a new cycle of peach tablets on the proper day.
For postpartum women who do not breastfeed or after a second trimester abortion, start LorynaTM tablets no earlier than 4 weeks postpartum due to the increased risk of thromboembolism. If the patient starts on LorynaTM tablets postpartum and has not yet had a period, evaluate for possible pregnancy, and instruct her to use an additional method of contraception until she has taken LorynaTM tablets for 7 consecutive days.
Advice in Case of Gastrointestinal Disturbances
In case of severe vomiting or diarrhea, absorption may not be complete and additional contraceptive measures should be taken. If vomiting occurs within 3 to 4 hours after tablet-taking, this can be regarded as a missed tablet.
Dosage Forms and Strengths
LorynaTM (drospirenone and ethinyl estradiol tablet) is available in blister packs.
Each blister pack (28 film-coated tablets) contains in the following order:
- 24 peach tablets each containing 3 mg drospirenone (DRSP) and 0.02 mg ethinyl estradiol (EE)
- 4 white inert tablets
Contraindications
Do not prescribe drospirenone and ethinyl estradiol tablets to women who are known to have the following:
- Renal impairment
- Adrenal insufficiency
- A high risk of arterial or venous thrombotic diseases. Examples include women who are known to:
- Smoke, if over age 35 [see BOXED WARNING AND WARNINGS AND PRECAUTIONS (5.1)]
- Have deep vein thrombosis or pulmonary embolism, now or in the past [see WARNINGS AND PRECAUTIONS (5.1)]
- Have cerebrovascular disease [see WARNINGS AND PRECAUTIONS (5.1)]
- Have coronary artery disease [see WARNINGS AND PRECAUTIONS (5.1)]
- Have thrombogenic valvular or thrombogenic rhythm diseases of the heart (for example, subacute bacterial endocarditis with valvular disease, or atrial fibrillation) [see WARNINGS AND PRECAUTIONS (5.1)]
- Have inherited or acquired hypercoagulopathies [see WARNINGS AND PRECAUTIONS (5.1)]
- Have uncontrolled hypertension [see WARNINGS AND PRECAUTIONS (5.5)]
- Have diabetes mellitus with vascular disease [see WARNINGS AND PRECAUTIONS (5.7)]
- Have headaches with focal neurological symptoms or have migraine headaches with or without aura if over age 35 [see WARNINGS AND PRECAUTIONS (5.8)]
- Undiagnosed abnormal uterine bleeding [see WARNINGS AND PRECAUTIONS (5.9)]
- Breast cancer or other estrogen- or progestin-sensitive cancer, now or in the past [see WARNINGS AND PRECAUTIONS (5.3)]
- Liver tumors, benign or malignant, or liver disease [see WARNINGS AND PRECAUTIONS (5.4) AND USE IN SPECIFIC POPULATIONS (8.7)]
- Pregnancy, because there is no reason to use COCs during pregnancy [see WARNINGS AND PRECAUTIONS (5.10) AND USE IN SPECIFIC POPULATIONS (8.1)]
Warnings and Precautions
Thromboembolic Disorders and Other Vascular Problems
Stop Drospirenone and ethinyl estradiol tablets if an arterial or venous thrombotic (VTE) event occurs.
The use of COCs increases the risk of venous thromboembolism. However, pregnancy increases the risk of venous thromboembolism as much or more than the use of COCs. The risk of venous thromboembolism in women using COCs has been estimated to be 3 to 9 per 10,000 woman-years. The risk of VTE is highest during the first year of use. Interim data from a large, prospective cohort safety study of various COCs suggest that this increased risk, as compared to that in non-COC users, is greatest during the first 6 months of COC use. Interim data from this safety study indicate that the greatest risk of VTE is present after initially starting a COC or restarting (following a 4 week or greater pill-free interval) the same or a different COC.
Use of COCs also increases the risk of arterial thromboses such as strokes and myocardial infarctions, especially in women with other risk factors for these events.
The risk of thromboembolic disease due to oral contraceptives gradually disappears after COC use is discontinued.
If feasible, stop drospirenone and ethinyl estradiol tablets at least 4 weeks before and through 2 weeks after major surgery or other surgeries known to have an elevated risk of thromboembolism.
Start drospirenone and ethinyl estradiol tablets no earlier than 4 weeks after delivery, in women who are not breastfeeding. The risk of postpartum thromboembolism decreases after the third postpartum week, whereas the risk of ovulation increases after the third postpartum week.
COCs have been shown to increase both the relative and attributable risks of cerebrovascular events (thrombotic and hemorrhagic strokes), although, in general, the risk is greatest among older (>35 years of age), hypertensive women who also smoke. COCs also increase the risk for stroke in women with other underlying risk factors.
Oral contraceptives must be used with caution in women with cardiovascular disease risk factors.
Stop drospirenone and ethinyl estradiol tablets if there is unexplained loss of vision, proptosis, diplopia, papilledema, or retinal vascular lesions. Evaluate for retinal vein thrombosis immediately. [See ADVERSE REACTIONS (6).]
Epidemiologic studies including a DRSP-containing COC
Several studies have investigated the relative risks of thromboembolism in women using a different DRSP-containing COC (Yasmin, which contains 0.03 mg of EE and 3 mg of DRSP) compared to those in women using COCs containing other progestins. Two prospective cohort studies, both evaluating the risk of venous and arterial thromboembolism and death, were initiated at the time of Yasmin approval.1,2 The first (EURAS) showed the risk of thromboembolism (particularly venous thromboembolism) and death in Yasmin users to be comparable to that of other oral contraceptive preparations, including those containing levonorgestrel (a so-called second generation COC). The second prospective cohort study (Ingenix) also showed a comparable risk of thromboembolism in Yasmin users compared to users of other COCs, including those containing levonorgestrel. In the second study, COC comparator groups were selected based on their having similar characteristics to those being prescribed Yasmin.
Two additional epidemiological studies, one case-control study (van Hylckama Vlieg et al.3) and one retrospective cohort study (Lidegaard et al.4) suggested that the risk of venous thromboembolism occurring in Yasmin users was higher than that for users of levonorgestrel-containing COCs and lower than that for users of desogestrel/gestodene-containing COCs (so-called third generation COCs). In the case-control study, however, the number of Yasmin cases was very small (1.2% of all cases) making the risk estimates unreliable. The relative risk for Yasmin users in the retrospective cohort study was greater than that for users of other COC products when considering women who used the products for less than one year. However, these one-year estimates may not be reliable because the analysis may include women of varying risk levels. Among women who used the product for 1 to 4 years, the relative risk was similar for users of Yasmin to that for users of other COC products.
Hyperkalemia
Drospirenone and ethinyl estradiol tablets contains 3 mg of the progestin DRSP which has antimineralocorticoid activity, including the potential for hyperkalemia in high-risk patients, comparable to a 25 mg dose of spironolactone. Drospirenone and ethinyl estradiol tablets should not be used in patients with conditions that predispose to hyperkalemia (that is, renal impairment, hepatic dysfunction and adrenal insufficiency). Women receiving daily, long-term treatment for chronic conditions or diseases with medications that may increase serum potassium should have their serum potassium level checked during the first treatment cycle. Medications that may increase serum potassium include ACE inhibitors, angiotensin-II receptor antagonists, potassium-sparing diuretics, potassium supplementation, heparin, aldosterone antagonists, and NSAIDS.
Carcinoma of the Breasts and Reproductive Organs
Women who currently have or have had breast cancer should not use drospirenone and ethinyl estradiol tablets because breast cancer is a hormonally-sensitive tumor.
There is substantial evidence that COCs do not increase the incidence of breast cancer. Although some past studies have suggested that COCs might increase the incidence of breast cancer, more recent studies have not confirmed such findings.
Some studies suggest that COCs are associated with an increase in the risk of cervical cancer or intraepithelial neoplasia. However, there is controversy about the extent to which these findings may be due to differences in sexual behavior and other factors.
Liver Disease
Discontinue drospirenone and ethinyl estradiol tablets if jaundice develops. Steroid hormones may be poorly metabolized in patients with impaired liver function. Acute or chronic disturbances of liver function may necessitate the discontinuation of COC use until markers of liver function return to normal and COC causation has been excluded.
Hepatic adenomas are associated with COC use. An estimate of the attributable risk is 3.3 cases/100,000 COC users. Rupture of hepatic adenomas may cause death through intra-abdominal hemorrhage.
Studies have shown an increased risk of developing hepatocellular carcinoma in long-term (>8 years) COC users. However, the attributable risk of liver cancers in COC users is less than one case per million users.
Oral contraceptive-related cholestasis may occur in women with a history of pregnancy-related cholestasis. Women with a history of COC-related cholestasis may have the condition recur with subsequent COC use.
High Blood Pressure
For women with well-controlled hypertension, monitor blood pressure and stop drospirenone and ethinyl estradiol tablets if blood pressure rises significantly. Women with uncontrolled hypertension or hypertension with vascular disease should not use COCs.
An increase in blood pressure has been reported in women taking COCs, and this increase is more likely in older women and with extended duration of use. The incidence of hypertension increases with increasing concentration of progestin.
Gallbladder Disease
Studies suggest a small increased relative risk of developing gallbladder disease among COC users.
Carbohydrate and Lipid Metabolic Effects
Carefully monitor prediabetic and diabetic women who are taking drospirenone and ethinyl estradiol tablets. COCs may decrease glucose intolerance in a dose-related fashion.
Consider alternative contraception for women with uncontrolled dyslipidemias. A small proportion of women will have adverse lipid changes while on COC’s.
Women with hypertriglyceridemia, or a family history thereof, may be at an increased risk of pancreatitis when using COCs.
Headache
If a woman taking drospirenone and ethinyl estradiol tablets develops new headaches that are recurrent, persistent, or severe, evaluate the cause and discontinue drospirenone and ethinyl estradiol tablets if indicated.
An increase in frequency or severity of migraine during COC use (which may be prodromal of a cerebrovascular event) may be a reason for immediate discontinuation of the COC.
Bleeding Irregularities
Unscheduled (breakthrough or intracyclic) bleeding and spotting sometimes occur in patients on COCs, especially during the first three months of use. If bleeding persists or occurs after previously regular cycles, check for causes such as pregnancy or malignancy. If pathology and pregnancy are excluded, bleeding irregularities may resolve over time or with a change to a different COC.
Based on patient diaries from two contraceptive clinical trials of drospirenone and ethinyl estradiol tablets, 8 to 25% of women experienced unscheduled bleeding per 28-day cycle. A total of 12 subjects out of 1,056 (1.1%) discontinued due to menstrual disorders including intermenstrual bleeding, menorrhagia, and metrorrhagia.
Women who use drospirenone and ethinyl estradiol tablets may experience absence of withdrawal bleeding, even if they are not pregnant. Based on subject diaries from contraception trials for up to 13 cycles, 6 to 10% of women experienced cycles with no withdrawal bleeding. Some women may encounter post-pill amenorrhea or oligomenorrhea, especially when such a condition was pre-existent.
If withdrawal bleeding does not occur, consider the possibility of pregnancy. If the patient has not adhered to the prescribed dosing schedule (missed one or more active tablets or started taking them on a day later than she should have), consider the possibility of pregnancy at the time of the first missed period and take appropriate diagnostic measures. If the patient has adhered to the prescribed regimen and misses two consecutive periods, rule out pregnancy.
COC Use Before or During Early Pregnancy
Extensive epidemiological studies have revealed no increased risk of birth defects in women who have used oral contraceptives prior to pregnancy. Studies also do not suggest a teratogenic effect, particularly in so far as cardiac anomalies and limb-reduction defects are concerned, when taken inadvertently during early pregnancy.
The administration of oral contraceptives to induce withdrawal bleeding should not be used as a test for pregnancy [see USE IN SPECIFIC POPULATIONS (8.1)].
Depression
Women with a history of depression should be carefully observed and drospirenone and ethinyl estradiol tablets discontinued if depression recurs to a serious degree.
Interference with Laboratory Tests
The use of COCs may change the results of some laboratory tests, such as coagulation factors, lipids, glucose tolerance, and binding proteins. Women on thyroid hormone replacement therapy may need increased doses of thyroid hormone because serum concentrations of thyroid-binding globulin increase with use of COCs. DRSP causes an increase in plasma renin activity and plasma aldosterone induced by its mild antimineralocorticoid activity.
Monitoring
A woman who is taking COCs should have a yearly visit with her healthcare provider for a blood pressure check and for other indicated healthcare.
Other Conditions
In women with hereditary angioedema, exogenous estrogens may induce or exacerbate symptoms of angioedema. Chloasma may occasionally occur, especially in women with a history of chloasma gravidarum. Women with a tendency to chloasma should avoid exposure to the sun or ultraviolet radiation while taking COCs.
Adverse Reactions
The following serious adverse reactions with the use of COCs are discussed elsewhere in the labeling:
- Serious cardiovascular events and smoking [see BOXED WARNING AND WARNINGS AND PRECAUTIONS (5.1)]
- Vascular events [see WARNINGS AND PRECAUTIONS (5.1)]
- Liver disease [see WARNINGS AND PRECAUTIONS (5.3)]
Adverse reactions commonly reported by COC users are:
- Irregular uterine bleeding
- Nausea
- Breast tenderness
- Headache
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
Contraception and Acne Clinical Trials
The data provided reflect the experience with the use of drospirenone and ethinyl estradiol in the adequate and well-controlled studies for contraception (N=1,056) and for moderate acne vulgaris (N=536).
For contraception, a Phase 3, multicenter, multinational, open-label study was conducted to evaluate safety and efficacy up to one year in 1,027 women aged 17 to 36 who took at least one dose of drospirenone and ethinyl estradiol. A second Phase 3 study was a single center, open-label, active-controlled study to evaluate the effect of 7 28-day cycles of drospirenone and ethinyl estradiol on carbohydrate metabolism, lipids and hemostasis in 29 women aged 18 to 35. For acne, two multicenter, double-blind, randomized, placebo-controlled studies, in 536 women aged 14 to 45 with moderate acne vulgaris who took at least one dose of drospirenone and ethinyl estradiol, evaluated the safety and efficacy during up to 6 cycles.
The adverse reactions seen across the 2 indications overlapped, and are reported using the frequencies from the pooled dataset. The most common adverse reactions (≥ 2% of users) were: headache/migraine (6.7%), menstrual irregularities (including vaginal hemorrhage [primarily spotting] and metrorrhagia (4.7%), nausea/vomiting (4.2%), breast pain/tenderness (4%) and mood changes (mood swings, depression, depressed mood and affect lability) (2.2%).
Adverse Reactions (≥1%) Leading to Study Discontinuation
Contraception Clinical Trials
Of 1,056 women, 6.6% discontinued from the clinical trials due to an adverse reaction; the most frequent adverse reactions leading to discontinuation were headache/migraine (1.6%) and nausea/vomiting (1%).
Acne Clinical Trials
Of 536 women, 5.4% discontinued from the clinical trials due to an adverse reaction; the most frequent adverse reaction leading to discontinuation was menstrual irregularities (including menometrorrhagia, menorrhagia, metrorrhagia and vaginal hemorrhage) (2.2%) .
Serious Adverse Reactions
Contraception Clinical Trials: migraine and cervical dysplasia
Acne Clinical Trials: none reported in the clinical trials
Postmarketing Experience
The following adverse reactions have been identified during post approval use of drospirenone and ethinyl estradiol. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Adverse reactions are grouped into System Organ Classes, and ordered by frequency.
Vascular disorders: Venous and arterial thromboembolic events (including pulmonary emboli, deep vein thrombosis, cerebral thrombosis, retinal thrombosis, myocardial infarction and stroke), hypertension (including hypertensive crisis)
Hepatobiliary disorders: Gallbladder disease, liver function disturbances, liver tumors
Immune system disorders: Hypersensitivity (including anaphylactic reaction)
Metabolism and nutrition disorders: Hyperkalemia, hypertriglyceridemia, changes in glucose tolerance or effect on peripheral insulin resistance (including diabetes mellitus)
Skin and subcutaneous tissue disorders: Chloasma, angioedema, erythema nodosum, erythema multiforme
Gastrointestinal disorders: Inflammatory bowel disease
Musculoskeletal and connective tissue disorders: Systemic lupus erythematosus
Drug Interactions
Consult the labeling of all concurrently-used drugs to obtain further information about interactions with hormonal contraceptives or the potential for enzyme alterations.
Effects of Other Drugs on Combined Hormonal Contraceptives
Substances diminishing the efficacy of COCs: Drugs or herbal products that induce certain enzymes, including CYP3A4, may decrease the effectiveness of COCs or increase breakthrough bleeding. Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate and products containing St. John’s wort. Interactions between oral contraceptives and other drugs may lead to breakthrough bleeding and/or contraceptive failure. Counsel women to use an alternative method of contraception or a back-up method when enzyme inducers are used with COCs, and to continue back-up contraception for 28 days after discontinuing the enzyme inducer to ensure contraceptive reliability.
Substances increasing the plasma levels of COCs: Co-administration of atorvastatin and certain COCs containing EE increase AUC values for EE by approximately 20%. Ascorbic acid and acetaminophen may increase plasma EE levels, possibly by inhibition of conjugation. CYP3A4 inhibitors such as itraconazole or ketoconazole may increase plasma hormone levels.
HIV protease inhibitors and non-nucleoside reverse transcriptase inhibitors: Significant changes (increase and decrease) in plasma levels of estrogen and progestin have been noted in some cases of co-administration with HIV protease inhibitors or with non-nucleoside reverse transcriptase inhibitors.
Antibiotics: There have been reports of pregnancy while taking hormonal contraceptives and antibiotics, but clinical pharmacokinetic studies have not shown consistent effects of antibiotics on plasma concentrations of synthetic steroids.
Effect on DRSP: The main metabolites of DRSP in human plasma are generated without involvement of the cytochrome P450 system. Inhibitors of this enzyme system are therefore unlikely to influence the metabolism of DRSP.
Effects of Combined Oral Contraceptives on Other Drugs
COCs containing EE may inhibit the metabolism of other compounds. COCs have been shown to significantly decrease plasma concentrations of lamotrigine, likely due to induction of lamotrigine glucuronidation. This may reduce seizure control; therefore, dosage adjustments of lamotrigine may be necessary. Consult the labeling of the concurrently-used drug to obtain further information about interactions with COCs or the potential for enzyme alterations.
In vitro and clinical studies did not indicate an inhibitory potential of DRSP towards human CYP450 enzymes at clinically relevant concentrations [see CLINICAL PHARMACOLOGY (12.3)].
Interactions that Have the Potential to Increase Serum Potassium
There is a potential for an increase in serum potassium in women taking drospirenone and ethinyl estradiol tablets with other drugs that may increase serum potassium [see WARNINGS AND PRECAUTIONS (5.2) AND CLINICAL PHARMACOLOGY (12.3)].
USE IN SPECIFIC POPULATIONS
Pregnancy
There is little or no increased risk of birth defects in women who inadvertently use COCs during early pregnancy. Epidemiologic studies and meta-analyses have not found an increased risk of genital or non-genital birth defects (including cardiac anomalies and limb-reduction defects) following exposure to low dose COCs prior to conception or during early pregnancy.
The administration of COCs to induce withdrawal bleeding should not be used as a test for pregnancy. COCs should not be used during pregnancy to treat threatened or habitual abortion.
Women who do not breastfeed may start COCs no earlier than four weeks postpartum.
Nursing Mothers
When possible, advise the nursing mother to use other forms of contraception until she has weaned her child. Estrogen-containing COCs can reduce milk production in breastfeeding mothers. This is less likely to occur once breastfeeding is well-established; however, it can occur at any time in some women. Small amounts of oral contraceptive steroids and/or metabolites are present in breast milk.
After oral administration of 3 mg DRSP/0.03 mg EE (Yasmin) tablets, about 0.02% of the DRSP dose was excreted into the breast milk of postpartum women within 24 hours. This results in a maximal daily dose of about 0.003 mg DRSP in an infant.
Pediatric Use
Safety and efficacy of drospirenone and ethinyl estradiol tablets have been established in women of reproductive age. Safety and efficacy are expected to be the same for postpubertal adolescents under the age of 18 and for users 18 years and older. Use of this product before menarche is not indicated.
Geriatric Use
Drospirenone and ethinyl estradiol tablets have not been studied in postmenopausal women and is not indicated in this population.
Patients with Renal Impairment
Drospirenone and ethinyl estradiol is contraindicated in patients with renal impairment [see CONTRAINDICATIONS (4) AND WARNINGS AND PRECAUTIONS (5.2)].
In subjects with mild renal impairment (creatinine clearance CLcr, 50–80 mL/min), serum DRSP levels were comparable to those in subjects with normal renal function (CLcr, >80 mL/min). In subjects with moderate renal impairment (CLcr, 30–50 mL/min), serum DRSP levels were on average 37% higher than those in the group with normal renal function. In addition, there is a potential to develop hyperkalemia in subjects with renal impairment whose serum potassium is in the upper reference range, and who are concomitantly using potassium sparing drugs [see CLINICAL PHARMACOLOGY (12.3)].
Patients with Hepatic Impairment
Drospirenone and ethinyl estradiol is contraindicated in patients with hepatic disease [see CONTRAINDICATIONS (4) AND WARNINGS AND PRECAUTIONS (5.4)]. The mean exposure to DRSP in women with moderate liver impairment is approximately three times higher than the exposure in women with normal liver function. Drospirenone and ethinyl estradiol has not been studied in women with severe hepatic impairment.
Overdosage
There have been no reports of serious ill effects from overdose, including ingestion by children. Overdosage may cause withdrawal bleeding in females and nausea.
DRSP is a spironolactone analogue which has antimineralocorticoid properties. Serum concentration of potassium and sodium, and evidence of metabolic acidosis, should be monitored in cases of overdose.
Loryna Description
LorynaTM (drospirenone and ethinyl estradiol tablets) provides an oral contraceptive regimen consisting of 24 peach active film-coated tablets each containing 3 mg of drospirenone and 0.02 mg of ethinyl estradiol and 4 white inert film coated tablets.
Each active tablet consist of black iron oxide, croscarmellose sodium, lactose fast flo, polyethylene glycol, magnesium stearate, polysorbate 80, polyvinyl alcohol, povidone K-30, pregelatinized starch, talc, titanium dioxide, red iron oxide, yellow iron oxide.
The inert tablet consist of croscarmellose sodium, lactose fast flo, polyethylene glycol, magnesium stearate, polysorbate 80, polyvinyl alcohol, povidone K-30, pregelatinized starch, talc, titanium dioxide.
Drospirenone (6R,7R,8R,9S,10R,13S,14S,15S,16S,17S)-1,3’,4’,6,6a,7,8,9,10,11, 12,13,14,15,15a,16-hexadecahydro10,13-dimethylspiro-[17H-dicyclopropa- [6,7:15,16]cyclopenta[a]phenanthrene-17,2’(5H)-furan]-3,5’(2H)-dione) is a synthetic progestational compound and has a molecular weight of 366.5 and a molecular formula of C24H30O3.
Ethinyl estradiol (19-nor-17α-pregna 1,3,5(10)-triene-20-yne-3, 17-diol) is a synthetic estrogenic compound and has a molecular weight of 296.4 and a molecular formula of C20H24O2.
The structural formulas are as follows:
Loryna - Clinical Pharmacology
Mechanism of Action
COCs lower the risk of becoming pregnant primarily by suppressing ovulation. Other possible mechanisms may include cervical mucus changes that inhibit sperm penetration and the endometrial changes that reduce the likelihood of implantation.
Pharmacodynamics
Drospirenone is a spironolactone analogue with antimineralocorticoid and antiandrogenic activity. The estrogen in drospirenone and ethinyl estradiol is ethinyl estradiol.
Contraception
Two studies evaluated the effect of 3 mg DRSP / 0.02 mg EE combinations on the suppression of ovarian activity as assessed by measurement of follicle size via transvaginal ultrasound and serum hormone (progesterone and estradiol) analyses during two treatment cycles (21-day active tablet period plus 7-day pill-free period). More than 90% of subjects in these studies demonstrated ovulation inhibition. One study compared the effect of 3 mg DRSP/0.02 mg EE combinations with two different regimens (24-day active tablet period plus 4-day pill-free period vs. 21-day active tablet period plus 7-day pill-free period) on the suppression of ovarian activity during two treatment cycles. During the first treatment cycle, there were no subjects (0/49, 0%) taking the 24-day regimen who ovulated compared to 1 subject (1/50, 2%) using the 21-day regimen. After intentionally introduced dosing errors (3 missed active tablets on Days 1 to 3) during the second treatment cycle, there was 1 subject (1/49, 2%) taking the 24-day regimen who ovulated compared to 4 subjects (4/50, 8%) using the 21-day regimen.
Acne
Acne vulgaris is a skin condition with a multifactorial etiology including androgen stimulation of sebum production. While the combination of EE and DRSP increases sex hormone binding globulin (SHBG) and decreases free testosterone, the relationship between these changes and a decrease in the severity of facial acne in otherwise healthy women with this skin condition has not been established. The impact of the antiandrogenic activity of DRSP on acne is not known.
Pharmacokinetics
Absorption
The absolute bioavailability of DRSP from a single entity tablet is about 76%. The absolute bioavailability of EE is approximately 40% as a result of presystemic conjugation and first-pass metabolism. The absolute bioavailability of drospirenone and ethinyl estradiol, which is a combination tablet of DRSP and EE stabilized by betadex as a clathrate (molecular inclusion complex), has not been evaluated. The bioavailability of EE is similar when dosed via a betadex clathrate formulation compared to when it is dosed as a free steroid. Serum concentrations of DRSP and EE reached peak levels within 1 to 2 hours after administration of Drospirenone and ethinyl estradiol.
The pharmacokinetics of DRSP are dose proportional following single doses ranging from 1 to 10 mg. Following daily dosing of drospirenone and ethinyl estradiol, steady state DRSP concentrations were observed after 8 days. There was about 2 to 3 fold accumulation in serum Cmax and AUC (0–24h) values of DRSP following multiple dose administration of drospirenone and ethinyl estradiol (see Table 1).
For EE, steady-state conditions are reported during the second half of a treatment cycle. Following daily administration of drospirenone and ethinyl estradiol, serum Cmax and AUC (0–24h) values of EE accumulate by a factor of about 1.5 to 2 (see Table 1).
TABLE 1: Table of Pharmacokinetic Parameters of Drospirenone And Ethinyl Estradiol (DRSP 3 mg and EE 0.02 mg)
| DRSP |
| Cycle / Day |
No. of Subjects |
Cmaxa (ng/mL) |
Tmaxb
(h) |
AUC(0–24h)a (ng•h/mL) |
t1/2a
(h) |
| 1/1 |
23 |
38.4 (25) |
1.5 (1–2) |
268 (19) |
NAc |
| 1/21 |
23 |
70.3 (15) |
1.5 (1–2) |
763 (17) |
30.8 (22) |
EE
|
| Cycle / Day |
No. of Subjects |
Cmaxa (pg/mL) |
Tmaxb
(h) |
AUC(0–24h)a (pg•h/mL) |
t1/2a
(h) |
| 1/1 |
23 |
32.8 (45) |
1.5 (1–2) |
108 (52) |
NAc |
| 1/21 |
23 |
45.1 (35) |
1.5 (1–2) |
220 (57) |
NAc |
a) geometric mean (geometric coefficient of variation)
b) median (range)
c) NA = Not available
Food Effect
The rate of absorption of DRSP and EE following single administration of a formulation similar to drospirenone and ethinyl estradiol was slower under fed (high fat meal) conditions with the serum Cmax being reduced about 40% for both components. The extent of absorption of DRSP, however, remained unchanged. In contrast, the extent of absorption of EE was reduced by about 20% under fed conditions.
Distribution
DRSP and EE serum levels decline in two phases. The apparent volume of distribution of DRSP is approximately 4 L/kg and that of EE is reported to be approximately 4 to 5 L/kg.
DRSP does not bind to SHBG or corticosteroid binding globulin (CBG) but binds about 97% to other serum proteins. Multiple dosing over 3 cycles resulted in no change in the free fraction (as measured at trough levels). EE is reported to be highly but non-specifically bound to serum albumin (approximately 98.5 %) and induces an increase in the serum concentrations of both SHBG and CBG. EE induced effects on SHBG and CBG were not affected by variation of the DRSP dosage in the range of 2 to 3 mg.
Metabolism
The two main metabolites of DRSP found in human plasma were identified to be the acid form of DRSP generated by opening of the lactone ring and the 4,5-dihydrodrospirenone-3-sulfate. These metabolites were shown not to be pharmacologically active. In in vitro studies with human liver microsomes, DRSP was metabolized only to a minor extent mainly by Cytochrome P450 3A4 (CYP3A4).
EE has been reported to be subject to presystemic conjugation in both small bowel mucosa and the liver. Metabolism occurs primarily by aromatic hydroxylation but a wide variety of hydroxylated and methylated metabolites are formed. These are present as free metabolites and as conjugates with glucuronide and sulfate. CYP3A4 in the liver is responsible for the 2-hydroxylation which is the major oxidative reaction. The 2-hydroxy metabolite is further transformed by methylation and glucuronidation prior to urinary and fecal excretion.
Excretion
DRSP serum levels are characterized by a terminal disposition phase half-life of approximately 30 hours after both single and multiple dose regimens. Excretion of DRSP was nearly complete after ten days and amounts excreted were slightly higher in feces compared to urine. DRSP was extensively metabolized and only trace amounts of unchanged DRSP were excreted in urine and feces. At least 20 different metabolites were observed in urine and feces. About 38–47% of the metabolites in urine were glucuronide and sulfate conjugates. In feces, about 17–20% of the metabolites were excreted as glucuronides and sulfates.
For EE the terminal disposition phase half-life has been reported to be approximately 24 hours. EE is not excreted unchanged. EE is excreted in the urine and feces as glucuronide and sulfate conjugates and undergoes enterohepatic circulation.
Specific Populations
Pediatric Use: Safety and efficacy of drospirenone and ethinyl estradiol has been established in women of reproductive age. Safety and efficacy are expected to be the same for postpubertal adolescents under the age of 18 and for users 18 years and older. Use of this product before menarche is not indicated. [See USE IN SPECIFIC POPULATIONS (8.4)]
Geriatric Use: Drospirenone and ethinyl estradiol has not been studied in postmenopausal women and is not indicated in this population. [See USE IN SPECIFIC POPULATIONS (8.5)]
Race: No clinically significant difference was observed between the pharmacokinetics of DRSP or EE in Japanese versus Caucasian women (age 25 to 35) when 3mg DRSP/0.02 mg EE was administered daily for 21 days. Other ethnic groups have not been specifically studied.
Renal Impairment:Drospirenone and ethinyl estradiol is contraindicated in patients with renal impairment.
The effect of renal impairment on the pharmacokinetics of DRSP (3 mg daily for 14 days) and the effect of DRSP on serum potassium levels were investigated in female subjects (n=28, age 30–65) with normal renal function and mild and moderate renal impairment. All subjects were on a low potassium diet. During the study, 7 subjects continued the use of potassium sparing drugs for the treatment of their underlying illness. On the 14th day (steady-state) of DRSP treatment, the serum DRSP levels i
