Drug Interactions With Tri-Previfem

Many medications can cause drug interactions with Tri-Previfem, including protease inhibitors, theophylline, many seizure medications, and aminoglutethimide. Taking the birth control pill with any of these medicines can increase your risk of pregnancy or side effects. If you are taking medicines that may cause negative Tri-Previfem drug interactions, use a backup method of birth control until you can talk to your healthcare provider.

 

Drug Interactions With Tri-Previfem: An Overview

Tri-Previfem™ (norgestimate/ethinyl estradiol) is a generic version of Ortho Tri-Cyclen®. It can potentially interact with numerous other medicines. Many of these interactions can be severe enough to cause accidental pregnancy, and a backup method of birth control may be recommended. If you are ever unsure what to do about a Tri-Previfem drug interaction, be sure to use backup birth control until you can speak with your healthcare provider. Some of the medicines that may lead to drug interactions with Tri-Previfem include:
 
 
    • Amobarbital (Amytal®)
    • Butalbital (Fioricet®, Fiorinal®)
    • Pentobarbital (Nembutal®)
    • Phenobarbital (Luminal®)
    • Secobarbital (Seconal®)
 
  • Cyclosporine (Gengraf®, Neoral®, Sandimmune®)
  • Many seizure medications, such as:
 
 
 
 
(Drug Interactions With Tri-Previfem Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;