Selected Practice Recommendations for Contraceptive Use
21. What can a woman do if she vomits after taking emergency contraceptive pills (ECPs)?
Vomiting within 2 hours after taking a dose of pills
The expert Working Group noted that levonorgestrel-only ECPs are less likely to cause nausea and vomiting than are combined estrogen-progestogen ECPs.
The expert Working Group considered that 2 hours was sufficient for hormone absorption and that no action is required if a woman vomits after this time.
Systematic review question
How does vomiting or diarrhoea during ECP use affect contraceptive effectiveness?
References from systematic review
No studies identified.
Key unresolved issues
Does vomiting within 2 hours after taking ECPs result in a meaningful decrease in effectiveness?
Information about the document
UPDATE 2008: (4 pages)