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Dictionary · Drug

levonorgestrel

A progestin hormone used in birth control pills, hormonal IUDs and the morning-after pill.

lee-voh-nor-JES-trel noun

What it means

A synthetic progestin. It is in many combined birth control pills, in hormonal intrauterine devices (IUDs) that last 3 to 8 years depending on the product, and in emergency contraception taken as soon as possible, within 72 hours of unprotected sex. It prevents pregnancy mainly by stopping ovulation and thickening cervical mucus.

For the nurse

Teach that emergency contraception works best the sooner it is taken and does not end an existing pregnancy. With an IUD, teach the client to check for the strings and report severe belly pain, fever or unusual discharge. None of these protect against sexually transmitted infections.

At a glance

Drug classprogestin (hormonal contraceptive)
Brand namesMirena, Kyleena, Liletta, Skyla (IUDs); Plan B One-Step (emergency contraception)
Also writtenMirena, Kyleena, Liletta, Plan B One-Step

Related terms

sexually transmitted infection

An infection passed from one person to another mainly through sexual contact.

etonogestrel

A progestin hormone used in a birth control implant placed under the skin of the upper arm.

norethindrone

A progestin hormone used in progestin-only birth control pills and to treat some menstrual problems.

medroxyprogesterone

A progestin hormone given as a birth control injection every 3 months, or as tablets for menstrual problems.

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