SRONYX Levonorgestrel and Ethinyl Estradiol Kit
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Estrogen class.
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🏭 Manufacturer & labeler
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🩺 Clinical
- It prevents pregnancy mainly by stopping your ovaries from releasing an egg. It also thickens the cervical mucus so sperm can't easily get through, and changes the uterine lining a...
- What exactly does this medication do, and how well does it work?
- The most common ones in the first few months are headaches, nausea, irregular bleeding or spotting, breast tenderness, and mood changes. Most of these tend to settle down after you...
- Are there any side effects I should expect when I first start?
Patient education
Supplement & herbal interactions
Where does this data come from?
Ask a licensed pharmacist directly — free, answered by our team.
🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
Where does this data come from?
IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.174 | $1.04 / 6 kit |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · quarterly | No Part D plan price is available for this NDC in our data. | |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Altavera 70700-0116-85 | Xiromed, | 1 kit | $0.113 | AB | Availability likely | save 35% |
| Ayuna 65862-0848-88 | Aurobindo | 3 pouches | $0.113 | AB | Availability likely | save 35% |
| Levonorgestrel And Ethinyl Estradiol 00378-6550-53 | Mylan | 3 pouches | $0.113 | AB | Discontinued | save 35% |
| Chateal EQ 50102-0230-23 | Afaxys | 3 pouches | $0.113 | AB | Availability likely | save 35% |
| Marlissa 68462-0388-29 | Glenmark | 1 kit | $0.113 | AB | Availability likely | save 35% |
| Kurvelo 68180-0844-73 | Lupin | 63 tablets | $0.113 | AB | Availability likely | save 35% |
| Portia 00555-9020-58 | Teva | 6 pouches | $0.113 | — | Availability likely | save 35% |
| Daysee 68180-0846-13 | Lupin | 2 pouches | $0.125 | AB | Availability likely | save 28% |
| Levora 51862-0097-06 | Mayne | 1 kit | $0.145 | AB | Discontinued | save 17% |
| Lessina 00555-9014-67 | Teva | 3 pouches | $0.151 | — | Availability likely | save 13% |
| Aubra EQ 50102-0220-23 | Afaxys | 3 pouches | $0.151 | AB1 | Availability likely | save 13% |
| Levonorgestrel and Ethinyl Estradiol 68180-0854-73 | Lupin | 1 kit | $0.151 | AB1 | Availability likely | save 13% |
| Levonorgestrel And Ethinyl Estradiol 00378-7287-53 | Mylan | 3 pouches | $0.151 | AB1 | Availability likely | save 13% |
| Aviane 00555-9045-58 | Teva | 6 pouches | $0.151 | — | Availability likely | save 13% |
| Vienva 70700-0118-85 | Xiromed, | 1 kit | $0.151 | AB1 | Availability likely | save 13% |
| Falmina 16714-0359-01 | Northstar | 1 packet | $0.151 | AB1 | Availability likely | save 13% |
| Lutera 51862-0028-06 | Mayne | 1 kit | $0.152 | AB1 | Discontinued | save 13% |
| Sronyxthis 51862-0545-06 | Mayne | 1 kit | $0.174 | AB2 | Discontinued | — |
| Introvale 70700-0117-87 | Xiromed, | 1 kit | $0.184 | AB | FDA listed | +6% |
| Setlakin 16714-0366-03 | Northstar | 3 pouches | $0.221 | AB | Availability likely | +27% |
| Levonorgestrel and Ethinyl Estradiol 68180-0843-13 | Lupin | 1 kit | $0.221 | AB | Availability likely | +27% |
| levonorgestrel and ethinyl estradiol 68462-0672-95 | Glenmark | 3 pouches | $0.221 | AB | Availability likely | +27% |
| Afirmelle 65862-0849-88 | Aurobindo | 3 pouches | $0.225 | AB1 | FDA listed | +29% |
| Iclevia 65862-0865-83 | Aurobindo | 3 pouches | $0.227 | AB | FDA listed | +30% |
| Levonorgestrel and Ethinyl Estradiol and Ethinyl Estradiol 68180-0848-13 | Lupin | 2 pouches | $0.239 | AB | Availability likely | +38% |
| Levonest 16714-0340-01 | Northstar | 1 packet | $0.339 | AB | Availability likely | +95% |
| Levonorgestrel and Ethinyl Estradiol 68180-0857-73 | Lupin | 1 kit | $0.339 | AB | Availability likely | +95% |
| Tyblume 00642-7471-01 | Exeltis | 1 kit | $0.828 | — | Availability likely | +375% |
| levonorgestrel and ethinyl estradiol 42192-0623-03 | Acella | 1 kit | $3.442 | AB3 | Availability likely | +1877% |
| Levonest 50090-2505-00 | A-S | 1 kit | — | AB | FDA listed | — |
| Kurvelo 50090-6374-00 | A-S | 21 tablets | — | AB | FDA listed | — |
| Altavera 63629-2343-01 | Bryant | 1 kit | — | AB | FDA listed | — |
| Lutera 55741-0005-06 | Dr. | 1 kit | — | AB1 | FDA listed | — |
| Balcoltra 75854-0602-02 | Avion | 1 kit | — | AB3 | FDA listed | — |
| Vienva Tm 50090-5580-00 | A-S | 1 kit | — | AB1 | FDA listed | — |
| Levonorgestrel and Ethinyl Estradiol 79929-0003-07 | Naari | 1 kit | — | AB | FDA listed | — |
| Levonorgestrel and Ethinyl Estradiol 60505-4898-08 | Apotex | 1 kit | — | AB1 | FDA listed | — |
| Levonorgestrel and Ethinyl Estradiol 60505-4899-08 | Apotex | 1 kit | — | AB | FDA listed | — |
| Vienva TM 63629-2344-01 | Bryant | 1 kit | — | AB1 | FDA listed | — |
| Levonorgestrel and Ethinyl Estradiol 79929-0004-07 | Naari | 1 kit | — | AB1 | FDA listed | — |
| Aviane 63187-0889-28 | Proficient | 1 pouch | — | — | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
📊 Medicare Part D spend CMS · PART D · 2025 (Q1-Q4)
📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 51862-0545-06 You're viewing this | 6 BLISTER PACK in 1 CARTON (51862-545-06) / 1 KIT in 1 BLISTER PACK (51862-545-01) | 2016-08-03 | Discontinued by firm |
🧭 About this NDC listing & data coverage
Kit / multi-component package
This NDC identifies a kit — a package containing more than one component. Structured data (pricing, ingredients, equivalents) is often reported per component rather than for the kit NDC itself, which can make this page look thinner than the components' own pages.
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | — Not published for this NDC No photo available yet for this listing. |
| Inactive ingredients (structured) | — Not published for this NDC The labeler did not submit a structured excipient list, or no SPL is available. |
| NADAC pharmacy acquisition price (CMS) | ✓ Available |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
Questions about this listing
What does the discontinued status mean for this NDC?
Is the NDC printed on the package the same as the 11-digit billing NDC?
What do the three segments of this NDC mean?
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Do I need a prescription for this product?
Where does this data come from?
📄 Full prescribing information FDA SPL
🚨 Boxed Warning ▾
Cigarette smoking increases the risk of serious cardiovascular side effects from oral contraceptive use. This risk increases with age and with heavy smoking (15 or more cigarettes per day) and is quite marked in women over 35 years of age. Women who use oral contraceptives should be strongly advised not to smoke.
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Oral contraceptives are indicated for the prevention of pregnancy in women who elect to use this product as a method of contraception. Oral contraceptives are highly effective. Table III lists the typical accidental pregnancy rates for users of combination oral contraceptives and other methods of contraception.
The efficacy of these contraceptive methods, except sterilization, depends upon the reliability with which they are used. Correct and consistent use of methods can result in lower failure rates. Table III Percentage of women experiencing an unintended pregnancy during the first year of typical use and first year of perfect use of contraception and the percentage continuing use at the end of the first year.
United States. % of Women Experiencing an Accidental Pregnancy within the First Year of Use % of Women Continuing Use at One Year Among couples attempting to avoid pregnancy, the percentage who continue to use a method for one year. Method (1) Typical Use Among typical couples who initiate use of a method (not necessarily for the first time), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason. (2) Perfect Use Among couples who initiate use of a method (not necessarily for the first time) and who use it perfectly (both consistently and correctly), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason.
(3) (4) Source: Trussell J, Contraceptive efficacy. In Hatcher RA, Trussell J, Stewart F, Cates W, Stewart GK, Kowal D, Guest F, Contraceptive Technology: Seventeenth Revised Edition. New York NY: Irvington Publishers, 1998.
4 The percentages becoming pregnant in columns (2) and (3) are based on data from populations where contraception is not used and from women who cease using contraception in order to become pregnant. Among such populations, about 89% become pregnant within one year. This estimate was lowered slightly (to 85%) to represent the percentage who would become pregnant within one year among women now relying on reversible methods of contraception if they abandoned contraception altogether.
Chance 85 85 Spermicides Foams, creams, gels, vaginal suppositories, vaginal film. 26 6 40 Periodic abstinence 25 63 Calendar 9 Ovulation method 3 Sympto-thermal Cervical mucus (ovulation) method supplemented by calendar in the pre-ovulatory and basal body temperature in the post-ovulatory phases. 2 Post Ovulation 1 Withdrawal 19 4 Cap With spermicidal cream or jelly.
Parous women 40 26 42 Nulliparous women 20 9 56 Sponge Parous women 40 20 42 Nulliparous women 20 9 56 Diaphragm 20 6 56 Condom Without spermicides. Female (Reality) 21 5 56 Male 14 3 61 Pill 5 71 Progestin only
0.5 Combined
0.1IUD Progesterone T 2 1.5 81 Copper T380A 0.8 0.6 78 Lng 20 0.1 0.1 81 Depo Provera 0.3 0.3 70 Norplant and Norplant-2 0.05 0.05 88 Female sterilization 0.5 0.5 100 Male sterilization 0.15 0.10 100
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION Sronyx ® (Levonorgestrel and Ethinyl Estradiol Tablets USP) To achieve maximum contraceptive effectiveness, Sronyx must be taken exactly as directed at intervals not exceeding 24-hours. Sronyx is a monophasic preparation plus 7 inert tablets. The dosage of Sronyx is one tablet daily for 21 consecutive days per menstrual cycle plus 7 peach inert tablets according to the prescribed schedule.
It is recommended that Sronyx be taken at the same time each day, preferably after the evening meal or at bedtime. During the first cycle of medication, the patient should be instructed to take one white Sronyx tablet daily and then 7 peach inert tablets for twenty-eight (28) consecutive days, beginning on day one (1) of her menstrual cycle. (The first day of menstruation is day one.) Withdrawal bleeding usually occurs within 3 days following the last white tablet.
(If Sronyx is first taken later than the first day of the first menstrual cycle of medication or postpartum, contraceptive reliance should not be placed on Sronyx until after the first 7 consecutive days of administration. The possibility of ovulation and conception prior to initiation of medication should be considered.) When switching from another oral contraceptive, Sronyx should be started on the first day of bleeding following the last active tablet taken of the previous oral contraceptive. The patient begins her next and all subsequent 28-day courses of Sronyx on the same day of the week that she began her first course, following the same schedule.
She begins taking her white tablets on the next day after ingestion of the last peach tablet, regardless of whether or not a menstrual period has occurred or is still in progress. Anytime a subsequent cycle of Sronyx is started later than the next day, the patient should be protected by another means of contraception until she has taken a tablet daily for seven consecutive days. If spotting or breakthrough bleeding occurs, the patient is instructed to continue on the same regimen.
This type of bleeding is usually transient and without significance, however, if the bleeding is persistent or prolonged, the patient is advised to consult her physician. Although the occurrence of pregnancy is highly unlikely if Sronyx is taken according to directions, if withdrawal bleeding does not occur, the possibility of pregnancy must be considered. If the patient has not adhered to the prescribed schedule (missed one or more active tablets or started taking them on a day later than she should have), the probability of pregnancy should be considered at the time of the first missed period and appropriate diagnostic measures taken before the medication is resumed.
If the patient has adhered to the prescribed regimen and misses two consecutive periods, pregnancy should be ruled out before continuing the contraceptive regimen. The risk of pregnancy increases with each active (white) tablet missed. For additional patient instructions regarding missed pills, see the "WHAT TO DO IF YOU MISS PILLS" section in the DETAILED PATIENT LABELING below.
If breakthrough bleeding occurs following missed tablets, it will usually be transient and of no consequence. If the patient misses one or more peach tablets, she is still protected against pregnancy provided she begins taking white tablets again on the proper day. In the nonlactating mother, Sronyx may be initiated postpartum, for contraception.
When the tablets are administered in the postpartum period, the increased risk of thromboembolic disease associated with the postpartum period must be considered. (See " CONTRAINDICATIONS , " " WARNINGS , " and PRECAUTIONS " concerning thromboembolic disease.) It is to be noted that early resumption of ovulation may occur if bromocriptine mesylate has been used for the prevention of lactation.
⛔ Contraindications ▾
CONTRAINDICATIONS Levonorgestrel and ethinyl estradiol tablets are contraindicated in females who are known to have or develop the following conditions: Thrombophlebitis or thromboembolic disorders A past history of deep-vein thrombophlebitis or thromboembolic disorders Cerebral-vascular or coronary-artery disease Current diagnosis of, or history of, breast cancer, which may be hormone sensitive Carcinoma of the endometrium or other known or suspected estrogen dependent neoplasia Undiagnosed abnormal genital bleeding Cholestatic jaundice of pregnancy or jaundice with prior pill use Hepatic adenomas or carcinomas Known or suspected pregnancy Are receiving Hepatitis C drug combinations containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, due to the potential for ALT elevations (see Warnings, RISK OF LIVER ENZYME ELEVATIONS WITH CONCOMITANT HEPATITIS C TREATMENT ).
⚠️ Warnings ▾
WARNINGS Cigarette smoking increases the risk of serious cardiovascular side effects from oral contraceptive use. This risk increases with age and with heavy smoking (15 or more cigarettes per day) and is quite marked in women over 35 years of age. Women who use oral contraceptives should be strongly advised not to smoke.
The use of oral contraceptives is associated with increased risks of several serious conditions including myocardial infarction, thromboembolism, stroke, hepatic neoplasia, gallbladder disease, and hypertension, although the risk of serious morbidity or mortality is very small in healthy women without underlying risk factors. The risk of morbidity and mortality increases significantly in the presence of other underlying risk factors such as hypertension, hyperlipidemias, obesity and diabetes. Practitioners prescribing oral contraceptives should be familiar with the following information relating to these risks.
The information contained in this package insert is based principally on studies carried out in patients who used oral contraceptives with higher formulations of estrogens and progestogens than those in common use today. The effect of long-term use of the oral contraceptives with lower formulations of both estrogens and progestogens remains to be determined. Throughout this labeling, epidemiologic studies reported are of two types: retrospective or case control studies and prospective or cohort studies.
Case control studies provide a measure of the relative risk of a disease, namely, a ratio of the incidence of a disease among oral contraceptive users to that among nonusers. The relative risk does not provide information on the actual clinical occurrence of a disease. Cohort studies provide a measure of attributable risk, which is the difference in the incidence of disease between oral contraceptive users and nonusers.
The attributable risk does provide information about the actual occurrence of a disease in the population. For further information, the reader is referred to a text on epidemiologic methods. 1.
THROMBOEMBOLIC DISORDERS AND OTHER VASCULAR PROBLEMS a. Myocardial infarction An increased risk of myocardial infarction has been attributed to oral contraceptive use. This risk is primarily in smokers or women with other underlying risk factors for coronary-artery disease such as hypertension, hypercholesterolemia, morbid obesity, and diabetes.
The relative risk of heart attack for current oral contraceptive users has been estimated to be two to six. The risk is very low under the age of 30. Smoking in combination with oral contraceptive use has been shown to contribute substantially to the incidence of myocardial infarctions in women in their mid-thirties or older with smoking accounting for the majority of excess cases.
Mortality rates associated with circulatory disease have been shown to increase substantially in smokers over the age of 35 and nonsmokers over the age of 40 (Table IV) among women who use oral contraceptives. TABLE IV. (Adapted from P.M.
Layde and V. Beral) CIRCULATORY DISEASE MORTALITY RATES PER 100,000 WOMAN-YEARS BY AGE, SMOKING STATUS, AND ORAL CONTRACEPTIVE USE AGE EVER-USERS NON-SMOKERS EVER-USERS SMOKERS CONTROLS NON-SMOKERS CONTROL SMOKERS 15-24 0.0 10.5 0.0 0.0 25-34 4.4 14.2 2.7 4.2 35-44 21.5 63.4 6.4 15.2 45+ 52.4 206.7 11.4
27.9Oral contraceptives may compound the effects of well-known risk factors, such as hypertension, diabetes, hyperlipidemias, age and obesity. In particular, some progestogens are known to decrease HDL cholesterol and cause glucose intolerance, while estrogens may create a state of hyperinsulinism. Oral contraceptives have been shown to increase blood pressure among users (see section 10 in "WARNINGS" ).
Similar effects on risk factors have been associated with an increased risk of heart disease. Oral contraceptives must be used with caution in women with cardiovascular disease risk factors. b. Thromboembolism An increased risk of thromboemboli…
🤒 Adverse Reactions ▾
ADVERSE REACTIONS Post Marketing Experience Five studies that compared breast cancer risk between ever-users (current or past use) of COCs and never-users of COCs reported no association between ever use of COCs and breast cancer risk, with effect estimates ranging from 0.90 – 1.12 (Figure 2). Three studies compared breast cancer risk between current or recent COC users (,6 months since last use) and never users of COCs (Figure 2). One of these studies reported no association between breast cancer risk and COC use.
The other two studies found an increased relative risk of 1.19 – 1.33 with current or recent use. Both of these studies found an increased risk of breast cancer with current use of longer duration, with relative risks ranging from 1.03 with less than one year of COC use to approximate 1.4 with more than 8-10 years of COC use. Figure 2: Risk of Breast Cancer with Combined Oral Contraceptive Use RR = relative risk; OR = odds ratio; HR = hazard ratio. "ever COC" are females with current or past COC use; "never COC use" are females that never used COCs.
An increased risk of the following serious adverse reactions has been associated with the use of oral contraceptives (see " WARNINGS " section). Thrombophlebitis Arterial thromboembolism Pulmonary embolism Myocardial infarction Cerebral hemorrhage Cerebral thrombosis Hypertension Gallbladder disease Hepatic adenomas or benign liver tumors There is evidence of an association between the following conditions and the use of oral contraceptives, although additional confirmatory studies are needed: Mesenteric thrombosis Retinal thrombosis The following adverse reactions have been reported in patients receiving oral contraceptives and are believed to be drug related: Nausea Vomiting Gastrointestinal symptoms, (such as abdominal cramps and bloating) Breakthrough bleeding Spotting Change in menstrual flow Amenorrhea Temporary infertility after discontinuation of treatment Edema Melasma which may persist Breast changes: tenderness, enlargement, secretion Change in weight (increase or decrease) Change in cervical erosion and secretion Diminution in lactation when given immediately postpartum Cholestatic jaundice Migraine Rash (allergic) Mental depression Reduced tolerance to carbohydrates Vaginal candidiasis Change in corneal curvature (steepening) Intolerance to contact lenses The following adverse reactions have been reported in users of oral contraceptives and the association has been neither confirmed nor refuted: Pre-menstrual syndrome Cataracts Optic neuritis Changes in appetite Cystitis-like syndrome Headache Nervousness Dizziness Hirsutism Loss of scalp hair Erythema multiforme Erythema nodosum Hemorrhagic eruption Vaginitis Porphyria Impaired renal function Hemolytic uremic syndrome Budd-Chiari syndrome Acne Changes in libido Colitis Figure 2
🔄 Drug Interactions ▾
8. DRUG INTERACTIONS Reduced efficacy and increased incidence of breakthrough bleeding and menstrual irregularities have been associated with concomitant use of rifampin. A similar association, though less marked, has been suggested with barbiturates, phenylbutazone, phenytoin sodium, and possibly with griseofulvin, ampicillin and tetracyclines.
Concomitant Use with HCV Combination Therapy – Liver Enzyme Elevation Do not co-administer Sronyx with HCV drug combinations containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, due to potential for ALT elevations (see Warnings, RISK OF LIVER ENZYME ELEVATIONS WITH CONCOMITANT HEPATITIS C TREATMENT ).
🔄 Drug / Laboratory Test Interactions ▾
9. INTERACTIONS WITH LABORATORY TESTS Certain endocrine- and liver-function tests and blood components may be affected by oral contraceptives: Increased prothrombin and factors VII, VIII, IX and X; decreased antithrombin 3; increased norepinephrine-induced platelet aggregability. Increased thyroid-binding globulin (TBG) leading to increased circulating total thyroid hormone, as measured by protein-bound iodine (PBI), T4 by column or by radioimmunoassay.
Free T3 resin uptake is decreased, reflecting the elevated TBG, free T4 concentration is unaltered. Other binding proteins may be elevated in serum. Sex-binding globulins are increased and result in elevated levels of total circulating sex steroids and corticoids; however, free or biologically active levels remain unchanged.
Triglycerides may be increased. Glucose tolerance may be decreased. Serum folate levels may be depressed by oral contraceptive therapy.
This may be of clinical significance if a woman becomes pregnant shortly after discontinuing oral contraceptives.
🤰 Pregnancy ▾
11. PREGNANCY See " CONTRAINDICATIONS " and " WARNINGS " sections.
🧒 Pediatric Use ▾
13. PEDIATRIC USE Safety and efficacy of Levonorgestrel and Ethinyl Estradiol Tablets USP have been established in women of reproductive age. Safety and efficacy are expected to be the same for postpubertal adolescents under the age of 16 and for users 16 years and older. Use of this product before menarche is not indicated.
🆘 Overdosage ▾
OVERDOSAGE Serious ill effects have not been reported following acute ingestion of large doses of oral contraceptives by young children. Overdosage may cause nausea, and withdrawal bleeding may occur in females.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Combination oral contraceptives act by suppression of gonadotropins. Although the primary mechanism of this action is inhibition of ovulation, other alterations include changes in the cervical mucus (which increase the difficulty of sperm entry into the uterus) and the endometrium (which reduce the likelihood of implantation). PHARMACOKINETICS Absorption No specific investigation of the absolute bioavailability of levonorgestrel and ethinyl estradiol of Levonorgestrel and Ethinyl Estradiol Tablets USP in humans has been conducted.
However, literature indicates that levonorgestrel is rapidly and completely absorbed after oral administration and is not subject to first-pass metabolism. Ethinyl estradiol is rapidly and almost completely absorbed from the gastrointestinal tract but, due to first-pass metabolism in gut mucosa and liver, the absolute bioavailability of ethinyl estradiol is about 40%. After a single dose of three Levonorgestrel and Ethinyl Estradiol Tablets USP to 17 women under fasting conditions, the extents of absorption of levonorgestrel and ethinyl estradiol were 98.6% and 99.0%, respectively, relative to the same dose of the 2 drugs when given as a microcrystalline suspension in water.
The effect of food on the bioavailability of Levonorgestrel and Ethinyl Estradiol Tablets USP following oral administration has not been evaluated. The pharmacokinetics of levonorgestrel and ethinyl estradiol following daily administration of Levonorgestrel and Ethinyl Estradiol Tablets USP for 21 days per cycle for three cycles, were determined in 18 women. Estimates of the pharmacokinetic parameters of levonorgestrel and ethinyl estradiol following single and multiple dose administration of Levonorgestrel and Ethinyl Estradiol Tablets USP are summarized in Table I.
Mean levonorgestrel and ethinyl estradiol levels after a single dose and on day 21 at steady state are shown in Figure 1. The pharmacokinetics of total levonorgestrel are non-linear due to an increase in binding to SHBG, which is attributed to increased SHBG levels that are induced by the daily administration of ethinyl estradiol. Increased binding of levonorgestrel to SHBG leads to decreased clearance of levonorgestrel.
Observed maximum levonorgestrel concentrations increased from day 1 to day 21 of the 1st and 3rd cycles by 66% and 83%, respectively. In calculating the mean concentration for ethinyl estradiol, any individual subject value below the quantifiable limit (i.e., 20 pg/mL) was converted to 0; and the 0 values were included for calculation of the mean concentration. Table I provides a summary of Levonorgestrel and Ethinyl Estradiol pharmacokinetic parameters.
TABLE I MEAN (SD) PHARMACOKINETIC PARAMETERS OF LEVONORGESTREL AND ETHINYL ESTRADIOL TABLETS USP AFTER SINGLE DOSE AND AFTER MULTIPLE DOSING FOR 3 CYCLES C max = maximum concentration t max = time to maximum concentration AUC = area under the drug concentration curve from time 0 to infinity CL/f = oral clearance Vz = volume of distribution SHBG = sex hormone-binding globulin AUC (0-24) = area under the drug concentration time curve from time 0 to 24 hours; this represents the area for one dosing interval at steady state.
Levonorgestrel Day (cycle) Cmax ng/mL tmax h AUC ng∙h/mL CL/F mL/min/kg Vz L SHBG nmol/L 1 2.36 (0.79) 1.3 (0.4) 29.2 (10.0) 1.0 (0.3) 129 (46) 64.5 (22.0) AUC (0-24h) ng∙h/mL 21 (1) 4.04 (2.08) 1.0 (0.3) 43.8 (22.4) 0.73 (0.34) 106 (42) 94.7 (37.4) 21 (3) 4.53 (1.94) 1.0 (0.3) 49.5 (24.5) 0.65 (0.33) 96 (35) 107.4 (45.8) Ethinyl Estradiol Day (cycle) Cmax pg/mL tmax h AUC (0-24) pg∙h/mL 1 49.5 (13.4) 1.5 (0.4) 298 (215) 21(1) 66.2 (29.5) 1.4 (0.4) 596 (494) 21(3) 58.1 (19.3) 1.4 (0.3) 417 (289) Figure 1 Distribution Levonorgestrel in serum is primarily bound to SHBG.
Protein binding values for levonorgestrel are provided in Table II. Ethinyl estradiol is about 97% bound to plasma albumin. Ethinyl estradiol does not bind to SHBG, but induces SHBG synthesis.
TABL…
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Sronyx ® is available in a 28 Tablet Dispenser, arranged in 3 rows of 7 active tablets and 1 row of inert tablets, as follows: 21 active tablets: white, round tablet debossed with "WATSON" on one side and "967" on the other side. 7 inert tablets: peach, round tablet debossed with "WATSON" on one side and "P1" on the other side. Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.]
📦 Storage and Handling ▾
Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.]
📋 Description ▾
DESCRIPTION Each cycle of Sronyx ® (Levonorgestrel and Ethinyl Estradiol Tablets USP) consists of 21 white active tablets each containing 0.1 mg levonorgestrel and 0.02 mg ethinyl estradiol; and seven peach tablets – inert. The inactive ingredients are Croscarmellose Sodium NF, Lactose Monohydrate NF, Magnesium Stearate NF, Microcrystalline Cellulose (PH 102) NF, and Povidone (K29/32) NF. Each inactive, placebo tablet contains the following inactive ingredients: FD & C Yellow #6 Lake 35-42%, Lactose Anhydrous (DT Micro) NF, Lactose Monohydrate (200M) NF, Magnesium Stearate NF and Microcrystalline Cellulose NF.
Levonorgestrel has a molecular weight of 312.4 and a molecular formula of C 21 H 28 O 2 . Ethinyl estradiol has a molecular weight of 296.4 and a molecular formula of C 20 H 24 O 2 . The structural formulas are as follows: Chemical Structure
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