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Sronyx
Sronyx is a combined oral contraceptive pill that contains two hormones: ethinyl estradiol (an estrogen) and levonorgestrel (a progestin). It is primarily used to prevent pregnancy by inhibiting ovulation, thickening cervical mucus to block sperm, and altering the uterine lining to prevent implantation. Sronyx may also be used to regulate menstrual cycles, reduce the risk of ovarian cysts, and treat moderate acne in women who desire contraception.
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Frequently Asked Questions
How effective is Sronyx at preventing pregnancy?
When taken perfectly (at the same time every day), Sronyx is over 99% effective at preventing pregnancy. With typical use (occasional missed pills), its effectiveness decreases to about 91%.
Can I skip my period by skipping the placebo pills?
Yes, by starting a new pack of active pills immediately after finishing the active pills from your current pack, you can skip your period. Consult your healthcare provider before altering your pill regimen.
What should I do if I miss a dose of Sronyx?
If you miss one active pill, take it as soon as you remember and continue with your regular schedule. If you miss two or more active pills, consult the package insert for instructions and use a backup method of contraception for 7 days.
Can Sronyx cause weight gain?
Some women may experience minor weight changes while taking hormonal contraceptives like Sronyx. However, significant weight gain is uncommon, and maintaining a healthy diet and exercise routine can help manage weight.
Does Sronyx help with acne?
Yes, Sronyx is sometimes prescribed to help manage moderate acne in women who also want contraception. The hormones in the pill can reduce the production of androgens, which are linked to acne formation.
Comprehensive Drug Guide
How Does Sronyx Work?
- Preventing ovulation: The hormones in Sronyx stop the ovaries from releasing an egg each month.
- Thickening cervical mucus: This makes it difficult for sperm to travel through the cervix to fertilize an egg.
- Changing the uterine lining: The endometrial lining becomes less suitable for implantation of a fertilized egg, reducing the likelihood of pregnancy.
Common Dosages
- 21 active pills, each with 0.03 mg of ethinyl estradiol and 0.1 mg of levonorgestrel.
- 7 placebo pills, which do not contain hormones and are taken during the last week of the cycle.
Typical Dosing
- One active pill is taken daily for 21 days, followed by one placebo pill daily for 7 days.
- After completing the 28-day cycle, a new pack is started immediately the next day, ensuring no gaps between cycles.
- For best results, Sronyx should be taken at the same time each day.
Typical Dosing
FDA Approved Indications
- Prevention of pregnancy (contraception)
- Regulation of menstrual cycles
- Treatment of moderate acne in women at least 15 years of age who have begun menstruating and want contraception.
Who Shouldn't Take Sronyx?
- History of thromboembolic disorders (e.g., blood clots in the legs, lungs, or eyes)
- History of hormone-sensitive cancers (e.g., breast or uterine cancer)
- Severe liver disease
- Uncontrolled hypertension
- Women over 35 who smoke, due to increased risk of cardiovascular events
Advice From The Pharmacist
- Take Sronyx at the same time every day to maintain its effectiveness and reduce the risk of pregnancy.
- If you miss a dose, take it as soon as you remember. If you miss two or more active pills, consult the package insert or your healthcare provider for instructions and use backup contraception (like condoms) for the next 7 days.
- Sronyx does not protect against sexually transmitted infections (STIs). Use condoms for STI protection.
Side Effects of Sronyx
Common Side Effects
- Nausea or vomiting
- Breast tenderness
- Headache
- Weight changes
- Irregular menstrual bleeding or spotting
Uncommon/Severe Side Effects
- Blood clots (leg pain, swelling, shortness of breath, chest pain)
- Stroke or heart attack (sudden numbness, severe headache, or difficulty speaking)
- Liver problems (yellowing of the skin or eyes, dark urine)
Risks and Warnings of Sronyx
- Blood Clots: Like other combined oral contraceptives, Sronyx can increase the risk of blood clots, particularly in women who smoke, are over 35, or have other risk factors such as obesity.
- Hypertension: Sronyx can increase blood pressure, so it’s important for women with hypertension to have regular monitoring.
- Cancer Risk: Use of hormonal contraceptives has been associated with a slight increase in the risk of breast and cervical cancer, though the risk is outweighed by the reduced risk of ovarian and endometrial cancer.
Interactions with Sronyx
Common Drug Interactions
- Certain antibiotics (e.g., rifampin) and anticonvulsants (e.g., carbamazepine) can reduce the effectiveness of Sronyx, increasing the risk of pregnancy.
- St. John’s Wort: This herbal supplement may decrease the effectiveness of Sronyx by increasing its metabolism in the liver.
- Antiretroviral drugs: Medications for HIV/AIDS may also reduce the efficacy of Sronyx.
Alternatives to Sronyx
- Ortho-Cyclen: A similar combination oral contraceptive with different progestin (norgestimate) but used for the same indications.
- Yaz (drospirenone and ethinyl estradiol): A combination contraceptive pill with additional benefits for treating acne and premenstrual dysphoric disorder (PMDD).
- Depo-Provera (medroxyprogesterone): A long-acting injectable contraceptive that lasts for three months.
- Intrauterine devices (IUDs): Long-term birth control options, available in hormonal (e.g., Mirena) and non-hormonal (e.g., copper IUD) forms.
