药物信息为Levonorgestrel Tablets, 0.75 mg (Rebel Distributors Corp.): DOSAGE AND ADMINISTRATION

One levonorgestrel tablet should be taken orally as soon as possible within 72 hours after unprotected intercourse. The second tablet should be taken 12 hours after the first dose. Efficacy is better if levonorgestrel tablets are taken as directed as soon as possible after unprotected intercourse. Levonorgestrel tablets can be used at any time during the menstrual cycle.

The user should be instructed that if she vomits within one hour of taking either dose of medication she should contact her health care professional to discuss whether to repeat that dose.