How long does it take for TriNessa to become effective?
- Asked
- 25 Oct 2010 by unf0rgiven
- Updated
- 12 Nov 2010
- Topics
- trinessa, birth control
Responses (2)
Trinessa should become effective after you have taken 7 active tablets, or after 7 days, provided you have taken them as directed, on time, etc. Some doctors do however advise that you use extra protection for the first month.

Further Information
- TriNessa Information for Consumers
- TriNessa Information for Healthcare Professionals (includes dosage details)
- Side Effects of TriNessa (detailed)
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