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Drug Interactions With Previfem

Previfem Interactions Explained

The following sections explain in detail the potentially negative interactions that can occur when Previfem is combined with any of the drugs listed above.
 
Aminoglutethimide (Cytadren)
Taking Previfem and aminoglutethimide together increases the risk of pregnancy. You may need to use a backup method of contraception (such as condoms). Do not use these medications together without checking with your healthcare provider first.
 
Antibiotics
There have been reports of accidental pregnancy occurring in women taking birth control pills together with certain antibiotics. There is disagreement as to how significant and severe these interactions may be. Some antibiotics are more likely to cause problems than others. Ask your healthcare provider if you need a backup method of contraception any time you take an antibiotic.
 
Aprepitant (Emend)
Aprepitant may make Previfem less effective, perhaps increasing your chance of pregnancy. Talk with your healthcare provider before using these medications together. You may need to use a backup method of contraception.
 
Atorvastatin (Lipitor)
Atorvastatin may increase the level of Previfem in your blood, which may increase your risk of Previfem side effects. Check with your healthcare provider before taking these medications together.
 
Barbiturates
Barbiturates may cause your body to metabolize the hormones in Previfem too quickly, increasing your risk of pregnancy. Ask your healthcare provider if you should use a different method of contraception while taking a barbiturate.
 
Cyclosporine (Gengraf, Neoral, Sandimmune)
Previfem may increase the level of cyclosporine in your blood, increasing the chance of side effects of cyclosporine. Talk with your healthcare provider before taking these medications together. Your cyclosporine dose may need to be reduced, or you may need to switch to a different method of contraception.
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