Does luvox (fluvoxamine) affect the effects of plan b?

Plan B and Luvox:: Fluvoxamine (Luvox (fluvoxamine)) may increase the blood levels and effects of levonorgestrel (Plan B), Plan B One-Step within 24 hours is about 95% effective. Luvox (fluvoxamine) is Category C for pregnancy (risk cannot be ruled out) so it is important to discuss with your prescriber. Best regards.

Plan B: should still be effective with use of luvox despite interaction potential. Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.