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Drug Interactions between Telzir and Zarah

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

ethinyl estradiol fosamprenavir

Applies to: Zarah (drospirenone / ethinyl estradiol) and Telzir (fosamprenavir)

Using ethinyl estradiol together with fosamprenavir may decrease the effects of fosamprenavir. Alternative or nonhormonal methods of birth control should be considered if you are treated with fosamprenavir. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Major

drospirenone fosamprenavir

Applies to: Zarah (drospirenone / ethinyl estradiol) and Telzir (fosamprenavir)

Fosamprenavir may significantly increase the blood levels of drospirenone. This can increase the risk of developing hyperkalemia, or high levels of potassium in the blood, which in severe cases can lead to kidney failure, muscle paralysis, irregular heart rhythm, and cardiac arrest. Hyperkalemia is usually more likely to occur in people who are dehydrated or have kidney disease, diabetes, or advanced heart failure. Regular or long-term use of nonsteroidal anti-inflammatory drugs such as ibuprofen or naproxen (Aleve), or prescription medications such as potassium supplements or certain medications used to treat high blood pressure or heart conditions, may also increase the risk. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. You should seek medical attention if you experience nausea, vomiting, weakness, confusion, tingling of the hands and feet, a weak pulse, or a slow or irregular heartbeat, as these may be symptoms of hyperkalemia. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Drug and food interactions

Moderate

drospirenone food

Applies to: Zarah (drospirenone / ethinyl estradiol)

Grapefruit juice may increase the blood levels of certain medications such as drospirenone. You may want to limit your consumption of grapefruit and grapefruit juice during treatment with drospirenone. However, if you have been regularly consuming grapefruit or grapefruit juice with the medication, then it is advisable for you to talk with your doctor before changing the amounts of these products in your diet, as this may alter the effects of your medication. Contact your doctor if your condition changes or you experience increased side effects. Orange juice is not expected to interact.

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Moderate

fosamprenavir food

Applies to: Telzir (fosamprenavir)

Fosamprenavir suspension should be administered on an empty stomach in adults, but with food in pediatric patients to help the taste and compliance. If vomiting occurs within 30 minutes after dosing the suspension, the dose should be repeated. Fosamprenavir tablets may be taken with or without food. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Minor

ethinyl estradiol food

Applies to: Zarah (drospirenone / ethinyl estradiol)

Information for this minor interaction is available on the professional version.

Minor

ethinyl estradiol food

Applies to: Zarah (drospirenone / ethinyl estradiol)

Information for this minor interaction is available on the professional version.

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.


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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.