levonorgestrel medicine for preventing pregnancy

Description

Levonorgestrel is a synthetic progestin hormone used primarily for contraception. It is widely used in emergency contraception pills and certain long-term birth control methods.

Uses

1. Emergency Contraception (Plan B, Morning-After Pill)

   • Used to prevent pregnancy after unprotected sex or contraceptive failure.
   • Most effective when taken within 72 hours of intercourse.

2. Hormonal Birth Control

   • Found in some intrauterine devices (IUDs) like Mirena, Skyla, and Kyleena.
   • Used in birth control pills (combined with estrogen or alone in progestin-only pills).

3. Hormonal Implants

   • Used in contraceptive implants like Jadelle and Norplant for long-term birth control.

Mechanism of Action

• Prevents ovulation (release of an egg from the ovary).
• Thickens cervical mucus, making it difficult for sperm to reach the egg.
• Alters the uterine lining to prevent implantation of a fertilized egg.

Dosage & Administration

• Emergency Contraception: Typically 1.5 mg as a single dose or two 0.75 mg doses taken 12 hours apart.
• Birth Control Pills: Taken daily, as prescribed.