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Tri Femynor
Tri Femynor is a combination oral contraceptive that contains two hormones: ethinyl estradiol (an estrogen) and norgestimate (a progestin). It is primarily used to prevent pregnancy by inhibiting ovulation, altering the cervical mucus, and changing the lining of the uterus to make it difficult for sperm to fertilize an egg. In addition to birth control, Tri Femynor may be prescribed for managing acne or irregular menstrual periods.
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Frequently Asked Questions
How effective is Tri Femynor at preventing pregnancy?
When taken correctly, Tri Femynor is over 99% effective at preventing pregnancy. However, typical use, which includes occasional missed pills, reduces its effectiveness to around 91%.
Can Tri Femynor help with acne?
Yes, Tri Femynor is FDA-approved to treat acne in women who also wish to use birth control.
What should I do if I miss a dose of Tri Femynor?
If you miss one active pill, take it as soon as you remember and take the next pill at the usual time (this may mean taking two pills in one day). If you miss more than one pill, consult the package insert or your healthcare provider for instructions.
Can Tri Femynor cause weight gain?
Some women may experience weight changes while using Tri Femynor, but significant weight gain is uncommon.
Does Tri Femynor protect against STIs?
No, Tri Femynor does not protect against sexually transmitted infections (STIs). Use condoms or other barrier methods for STI protection.
Comprehensive Drug Guide
How Does Tri Femynor Work?
- Inhibiting ovulation: The hormones prevent the release of an egg from the ovaries.
- Thickening cervical mucus: This makes it more difficult for sperm to reach the egg.
- Altering the uterine lining: It prevents implantation by making the lining less suitable for a fertilized egg.
Common Dosages
- First phase: 0.18 mg norgestimate / 35 mcg ethinyl estradiol (7 tablets)
- Second phase: 0.215 mg norgestimate / 35 mcg ethinyl estradiol (7 tablets)
- Third phase: 0.25 mg norgestimate / 35 mcg ethinyl estradiol (7 tablets)
- Placebo phase: 7 inert tablets (no active hormones)
Typical Dosing
- Take one tablet daily at the same time each day, starting with the first tablet in the pack.
- Follow the order of the pack (21 active pills followed by 7 placebo pills).
- Start a new pack immediately after finishing the placebo pills, without skipping days.
Typical Dosing
FDA Approved Indications
- Contraception to prevent pregnancy.
- Treatment of acne in women who also desire oral contraception.
- Regulation of menstrual cycles and reduction of menstrual pain.
Who Shouldn't Take Tri Femynor?
- History of blood clots, stroke, or heart attack
- Uncontrolled high blood pressure
- Severe liver disease
- Known or suspected breast cancer
- Smokers over 35 years of age due to the increased risk of serious cardiovascular events
Advice From The Pharmacist
- Take Tri Femynor at the same time every day to maintain hormone levels and maximize its effectiveness.
- If you miss a pill, follow the instructions provided in the package insert or contact your healthcare provider for guidance. Missing pills increases the risk of pregnancy.
- Tri Femynor does not protect against sexually transmitted infections (STIs), so use additional protection if needed.
- Common side effects, such as nausea, breast tenderness, or spotting, may occur, especially when first starting the medication.
Side Effects of Tri Femynor
Common Side Effects
- Nausea or vomiting
- Breast tenderness
- Headache
- Weight gain
- Breakthrough bleeding or spotting
Uncommon/Severe Side Effects
- Blood clots (leg pain, chest pain, shortness of breath)
- Stroke (sudden weakness, vision changes, severe headache)
- Severe allergic reactions (rash, swelling, difficulty breathing)
Risks and Warnings of Tri Femynor
- Cardiovascular Risk: Women who smoke and are over the age of 35 should not use Tri Femynor due to an increased risk of blood clots, stroke, and heart attack.
- Blood Clot Risk: Hormonal contraceptives, including Tri Femynor, increase the risk of blood clots, especially in women with risk factors such as obesity or a family history of clotting disorders.
- Liver Disease: Tri Femynor may exacerbate liver conditions, and its use should be avoided in women with severe liver disease.
Interactions with Tri Femynor
Common Drug Interactions
- Antibiotics and anticonvulsants: Certain medications, like rifampin or phenobarbital, can reduce the effectiveness of Tri Femynor, increasing the risk of pregnancy.
- St. John’s Wort: This herbal supplement can decrease hormone levels, reducing the effectiveness of birth control.
- Other hormonal contraceptives: Do not combine Tri Femynor with other hormonal contraceptives to avoid an increased risk of side effects.
Alternatives to Tri Femynor
- Ortho Tri-Cyclen: A similar triphasic oral contraceptive containing norgestimate and ethinyl estradiol.
- Loestrin: A lower-dose combination oral contraceptive.
- NuvaRing: A vaginal ring that releases hormones similar to those in oral contraceptives.
- Depo-Provera: An injectable form of birth control that provides long-term contraception.
