Other Brand Names Containing the Same Estrogen and Progestin

Alesse, Enpresse, Sronyx, Levlen, Levlite, Levora, Lutera, Lybrel, Nordette, Portia, Lessina, Tri-Levlen, Triphasil, Trivora

Other Brands of Birth Control that Contain the Progestin Levonorgestrel

Emergency Contraceptives: Plan B, Plan B One Step, Next Choice
Monophasic: Alesse, Aviane, Lessina, Levlen, Levora, Lutera, Lybrel, Nordette, Portia
Multiphasic: Enpresse, Levlite, Tri-Levlen, Triphasil, Trivora
Extended Cycle Pills: Jolessa, LoSeasonique, Quasense, Seasonale, Seasonique
Non-pill Methods: Mirena (IUD)

What Makes it Different

  • All brands, including Sronyx, which contain the progestin levonorgestrel have been FDA approved for use as an Emergency Contraceptive.
  • Before using Sronyx as Emergency Contraception, speak to a healthcare professional.
  • To use Sronyx as an Emergency Contraceptive, take all indicated pills no more than 120 hours (five days) after unprotected sex. It is most effective when taken within 72 hours (three days).
  • Dosage for emergency contraception: take five white pills and, exactly 12 hours later, take another five white pills.

How it Works

Sronyx (ethinyl estradiol and levonorgestrel) prevents pregnancy in three ways by utilizing a combination of the female hormones estrogen and progestin. The hormones prevent ovulation (the release of an egg from one of the ovaries). Sronyx also thickens the cervical mucus, inhibiting sperm from reaching and fertilizing the egg. The hormones also prevent the uterine lining from thickening, which makes it less hospitable to implantation.

Oral contraceptives are only to be utilized as a form of birth control. The Pill does not protect against the transmission of HIV (AIDS) or other sexually transmitted infections (STIs).

How to Use

To begin, take your first pill on the first day of your period or the first Sunday after your period has begun.  Take one pill per day after that until you reach the end of your pack. Use Sronyx as your healthcare provider has instructed. Do not take for more often or longer than your healthcare provider mandates.

If you miss a dose of Sronyx, your risk of pregnancy will be heightened. It is sometimes possible to make up for missing a pill and still maintain the effectiveness of the birth control. For further instruction, contact with your healthcare provider immediately upon realizing you’ve missed one or more pills.


Sronyx has been shown to prevent pregnancy in over 99% of situations when it is the only birth control method utilized and when Sronyx is used exactly as directed.


Most birth control pills cost $15-50 per pack, and each pack lasts one month.


When used correctly, Sronyx is an effective method of birth control. All birth control pills, Sronyx included, have also been shown to possibly have the following benefits:

  • Menstrual cycle regularity, and blood flow lightening (reducing the chances of anemia)
  • Cramps or other pain during menstruation becoming rarer and less intense
  • Noncancerous cysts or lumps in the breast may be less common
  • Ectopic pregnancies may occur with less frequency
  • Acute pelvic inflammatory disease may occur with less frequency


All birth control pills, including Sronyx, can increase the risk of blood clots, stroke and heart attack, especially for women who smoke and/or are older than 35. Women who are taking oral contraceptives should not smoke.

Possible side effects include

  • Mild Nausea or vomiting
  • Bloating, stomach cramps
  • Changes in weight or appetite
  • Changes in menstrual period, decreased sex drive
  • Breast pain, swelling or tenderness
  • Headache, nervousness, dizziness or tired feeling
  • Freckles or darkening of facial skin
  • Increased hair growth or loss of scalp hair
  • Problems with contact lenses
  • Vaginal itching or discharge
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