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Drug Interactions between emtricitabine / nelfinavir / tenofovir and Fortovase

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

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Interactions between your drugs

Moderate

saquinavir nelfinavir

Applies to: Fortovase (saquinavir) and emtricitabine / nelfinavir / tenofovir

Using saquinavir together with nelfinavir may increase the effects of saquinavir. Contact your doctor if you experience sore throat, headache, rash, increased urination or extreme thirst, easy bruising or bleeding, fever, chills, cough, nausea, stomach pain, loss of appetite, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes). 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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Moderate

saquinavir tenofovir

Applies to: Fortovase (saquinavir) and emtricitabine / nelfinavir / tenofovir

Saquinavir may increase the blood levels and effects of tenofovir. This can increase the risk of side effects including serious ones like kidney or liver damage and a condition known as lactic acidosis, which is a buildup of lactic acid in the blood. You should seek immediate medical attention if you develop symptoms of these conditions. Symptoms of kidney damage may include swelling, weight gain, shortness of breath, drowsiness, confusion, mood changes, increased thirst, loss of appetite, nausea, vomiting, pain in your lower back, and urinating more or less than usual or not at all. Symptoms of liver damage may include fever, chills, joint pain or swelling, unusual bleeding or bruising, skin rash, itching, loss of appetite, fatigue, nausea, vomiting, dark colored urine, and/or yellowing of the skin or eyes. Symptoms of lactic acidosis may include fatigue, unusual muscle pain, difficulty breathing, stomach pain, nausea, vomiting, lightheadedness, dizziness, and a fast or irregular heartbeat. You may need a dose adjustment or more frequent monitoring by your doctor 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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Drug and food interactions

Moderate

saquinavir food

Applies to: Fortovase (saquinavir)

Food can enhance the levels of saquinavir in your body. Saquinavir should be taken with meals or within 2 hours after eating. This will make it easier for your body to absorb the medication. Grapefruit can raise the levels of saquinavir in your body. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.

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Minor

tenofovir food

Applies to: emtricitabine / nelfinavir / tenofovir

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

Therapeutic duplication warnings

Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.

Duplication

Protease inhibitors

Therapeutic duplication

The recommended maximum number of medicines in the 'protease inhibitors' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'protease inhibitors' category:

  • emtricitabine/nelfinavir/tenofovir
  • Fortovase (saquinavir)

Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.

See also

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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.

Medical Disclaimer