3 doctors weighed in:

How long does triphasil (ethinyl estradiol and levonorgestrel) take to become effective?

3 doctors weighed in
Dr. Mary Vanko
Obstetrics & Gynecology
2 doctors agree

In brief: Ocp effectiveness.

To be absolutely safe, one month.

In brief: Ocp effectiveness.

To be absolutely safe, one month.
Dr. Mary Vanko
Dr. Mary Vanko
Thank
Get help from a real doctor now
Dr. Jane Van Dis
Board Certified, Obstetrics & Gynecology
14 years in practice
47M people helped
Continue
108,000 doctors available
Read more answers from doctors