Kelnor Drug Interactions

If you take certain medications in combination with Kelnor, drug interactions could occur that may increase your risk of pregnancy or other side effects. In some cases, you may need to use a backup method of contraception. Some of the medications that may cause negative drug interactions with Kelnor include certain antibiotics, many seizure medications, and St. John's wort.

An Introduction to Kelnor Drug Interactions

Kelnor™ (ethynodiol diacetate/ethinyl estradiol) may potentially interact with several other medications. At times, these interactions are severe enough to lead to unintentional pregnancy. A backup method of birth control, such as condoms, may be advised in many situations. Some of the medicines that may lead to Kelnor drug interactions include:
  • Aminoglutethimide (Cytadren®)
  • Aprepitant (Emend®)
  • Barbiturates, such as:
    • Amobarbital (Amytal®)
    • Butalbital (Fioricet®, Fiorinal®)
    • Pentobarbital (Nembutal®)
    • Phenobarbital (Luminal®)
    • Primidone (Mysoline®)
    • Secobarbital (Seconal®)
Last reviewed by: Kristi Monson, PharmD
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