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Drug Interactions between Histatab PH and ragweed pollen allergen extract

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

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Interactions between your drugs

Moderate

chlorpheniramine methscopolamine

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine) and Histatab PH (chlorpheniramine / methscopolamine / phenylephrine)

Using chlorpheniramine together with methscopolamine may increase side effects such as drowsiness, blurred vision, dry mouth, heat intolerance, flushing, decreased sweating, difficulty urinating, abdominal cramping, constipation, irregular heartbeat, confusion, and memory problems. Side effects may be more likely to occur in the elderly or those with a debilitating condition. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. 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

chlorpheniramine ragweed pollen allergen extract

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine) and ragweed pollen allergen extract

Using ragweed pollen allergen extract together with chlorpheniramine may not be advisable. Immunotherapy with ragweed pollen allergen extract can sometimes cause severe, even potentially life-threatening allergic reactions that require emergency treatment with epinephrine, and medications like chlorpheniramine can potentiate the body's response to epinephrine and significantly increase its effects on blood pressure and heart rate as well as serious and potentially fatal irregular heart rhythms. Talk to your doctor if you have any questions or concerns. 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

phenylephrine methscopolamine

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine) and Histatab PH (chlorpheniramine / methscopolamine / phenylephrine)

Methscopolamine may increase the effects of phenylephrine on your blood pressure and heart rate. Before receiving these medications, you should let your doctor know if you have high blood pressure or heart disease. You may not be able to use one or both of these medications, or you may need closer monitoring by your doctor in order to use these 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

chlorpheniramine food

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine)

Alcohol can increase the nervous system side effects of chlorpheniramine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with chlorpheniramine. Do not use more than the recommended dose of chlorpheniramine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

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Moderate

ragweed pollen allergen extract food

Applies to: ragweed pollen allergen extract

Consuming food or beverage during or immediately after using ragweed pollen allergen extract may reduce the amount of allergen extract available for absorption from tissues under the tongue into the blood stream. Food or beverage should not be taken with, or for at least 5 minutes after, using ragweed pollen allergen extract. Use of alcohol with ragweed pollen allergen extract may increase the risk and severity of allergic reactions that can sometimes occur during treatment with ragweed pollen allergen extract. Potentially life-threatening or fatal reactions may occur. Talk to your doctor if you have any questions or concerns. Stop using ragweed pollen allergen extract, administer epinephrine, and seek immediate medical attention if signs and symptoms of an allergic reaction develop such as trouble breathing, swallowing, or speaking; throat tightness or swelling; dizziness, lightheadedness, or fainting; rapid or weak heartbeat; severe stomach cramps or pain; vomiting or diarrhea; and/or severe flushing or itching. 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

methscopolamine food

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine)

Ask your doctor before using methscopolamine together with ethanol. Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking methscopolamine. You should be warned not to exceed recommended dosages and to avoid activities requiring mental alertness. If your doctor prescribes these medications together, you may need a dose adjustment to safely take this combination. 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

phenylephrine food

Applies to: Histatab PH (chlorpheniramine / methscopolamine / phenylephrine)

Both phenylephrine and caffeine can increase blood pressure and heart rate, and combining them may enhance these effects. Talk to your doctor before using these medications, especially if you have a history of high blood pressure or heart disease. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. 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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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.

Medical Disclaimer