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Drug interactions between dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Results for the following 2 drugs:
dexchlorpheniramine/dextromethorphan/phenylephrine/pyrilamine
hyoscyamine/methenamine/methylene blue/phenyl salicylate

Interactions between your drugs

Major

dextromethorphan methylene blue

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Using methylene blue together with dextromethorphan is not recommended. Combining these medications can increase the risk of a rare but serious condition called the serotonin syndrome, which may include symptoms such as confusion, hallucination, seizure, extreme changes in blood pressure, increased heart rate, fever, excessive sweating, shivering or shaking, blurred vision, muscle spasm or stiffness, tremor, incoordination, stomach cramp, nausea, vomiting, and diarrhea. Severe cases may result in coma and even death. In general, you should wait at least 14 days after stopping methylene blue before you start treatment with dextromethorphan. Conversely, if you have recently been on dextromethorphan and are now starting treatment with methylene blue, you should check with your doctor or pharmacist to see how long you should wait before it is safe for you to use methylene blue, as some medications can take a while to clear from your body. 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

phenylephrine methylene blue

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Using methylene blue together with phenylephrine is not recommended. Combining these medications can cause dangerously high blood pressure and even death. You may use phenylephrine only after you have been off methylene blue for at least 14 days. You should seek immediate medical attention if you experience sudden and severe headache, blurred vision, confusion, seizures, chest pain, nausea or vomiting, sudden numbness or weakness (especially on one side of the body), speech difficulties, fever, sweating, lightheadedness, and/or fainting during treatment with methylene blue, as these may be signs and symptoms of excessively high blood pressure. 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 hyoscyamine

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Hyoscyamine 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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Moderate

dexchlorpheniramine hyoscyamine

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Using dexchlorpheniramine together with hyoscyamine 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

pyrilamine hyoscyamine

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine and hyoscyamine / methenamine / methylene blue / phenyl salicylate

Using pyrilamine together with hyoscyamine 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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Drug and food interactions

Moderate

pyrilamine food

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine

Alcohol can increase the nervous system side effects of pyrilamine 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 pyrilamine. Do not use more than the recommended dose of pyrilamine, 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

dexchlorpheniramine food

Applies to: dexchlorpheniramine / dextromethorphan / phenylephrine / pyrilamine

Alcohol can increase the nervous system side effects of dexchlorpheniramine 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 dexchlorpheniramine. Do not use more than the recommended dose of dexchlorpheniramine, 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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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.

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.

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