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The standard ella dosage is one pill taken within 120 hours (five days) after unprotected sex or birth control failure. It is important to not take this pill if you are already pregnant or think you might be pregnant. Do not use this pill as your main form of birth control; there are other methods that are typically more effective at preventing pregnancy.

An Introduction to Dosing With Ella

There is only one dose of ella® (ulipristal acetate). As is always the case, do not adjust your dose unless your healthcare provider specifically tells you to do so.

Dosage of Ella for Emergency Contraception

ella comes in a package containing one tablet (30 mg). This tablet should be taken as soon as possible within 120 hours (five days) after unprotected sex or birth control failure. The sooner you take ella, the more effective it is at preventing pregnancy.
Do not take ella if you are already pregnant or think you might already be pregnant (see Ella and Pregnancy).

General Information on Taking Ella

Some considerations for women taking ella include the following:
  • ella requires a prescription from your healthcare provider.
  • If you vomit within three hours of taking ella, contact your healthcare provider right away to see if you need to take another dose.
  • ella can be taken at any point in the menstrual cycle.
  • ella should not be used as your main form of birth control, because other methods of birth control are usually much more effective.
  • Because ella blocks the effects of progesterone, it theoretically could decrease the effectiveness of routine birth control pills. After using ella, a barrier method of contraception (like a condom) should be used with any other sexual intercourse that occurs during that same menstrual cycle.
  • For the medication to work properly, it must be taken as prescribed.
  • If you are unsure about anything related to your ella dosage, please talk with your healthcare provider, nurse, or pharmacist.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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