LEVONORGESTREL
(Plan B, Norlevo, Morning After Pill)Standard Prescription
levonorgestrel 1.5 mg PO x 1 dose
Dosages
Emergency contraception dose:
1.5 mg PO x 1 dose.
1.5 mg PO x 1 dose.
Mechanism of Action
Progestin hormone; contraceptive
Forms Supplied
Tablet: 1.5 mg
Comments
Most effective in first 72 hours but may be used up to 5 days (120 hours) after intercourse.
Not effective if taken on the day of, the day just prior to ovulation or after ovulation.
May be less effective in women with BMI > 25. However, hormonal EC maintains some effectiveness regardless of BMI.
The Yuzpe Method of EC uses select oral contraceptives to deliver 2 doses of ethinyl estradiol (100 mcg) and levonorgestrel 500 mcg 12 hours apart This method is less effective and has more adverse effects than levonorgestrel.
References
136
Last Edited
2022-07-04 19:22:54
1.5 mg PO x 1 dose.
Copper IUD is the most effective for Emergency Contraception (EC).
Most effective in first 72 hours but may be used up to 5 days (120 hours) after intercourse.
Not effective if taken on the day of, the day just prior to ovulation or after ovulation.
May be less effective in women with BMI > 25. However, hormonal EC maintains some effectiveness regardless of BMI.
The Yuzpe Method of EC uses select oral contraceptives to deliver 2 doses of ethinyl estradiol (100 mcg) and levonorgestrel 500 mcg 12 hours apart This method is less effective and has more adverse effects than levonorgestrel.
Standard Prescription:
levonorgestrel 1.5 mg PO x 1 dose