2 doctors weighed in:

If you switch from tri previfem (norgestimate and ethinyl estradiol) to tri sprintec right after the plecebo week and start the first active pill day 4 of cycle are u still protected?

2 doctors weighed in
Dr. Suzanne Fiala
Family Medicine
1 doctor agrees

In brief: Yes.

As long as you start the new brand of pills at the usual time, and have had no lapse of birth control pills, you are still protected and do not need a back up birth control method.

In brief: Yes.

As long as you start the new brand of pills at the usual time, and have had no lapse of birth control pills, you are still protected and do not need a back up birth control method.
Dr. Suzanne Fiala
Dr. Suzanne Fiala
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