Drug Interaction Report
12 potential interactions and/or warnings found for the following 2 drugs:
- Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
- SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine)
Interactions between your drugs
codeine chlorpheniramine
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine), Decohistine DH (chlorpheniramine / codeine / pseudoephedrine), SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine)
Using codeine together with chlorpheniramine may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. 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.
codeine methscopolamine
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine), SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine)
Using codeine together with methscopolamine may increase the risk and/or severity of some side effects such as dizziness, drowsiness, confusion, difficulty concentrating, difficulty urinating, dry mouth, abdominal cramping, and constipation. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. 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.
chlorpheniramine methscopolamine
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine), SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine), SymPak (chlorpheniramine / guaifenesin / 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.
phenylephrine pseudoephedrine
Applies to: SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine), Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
Both phenylephrine and pseudoephedrine 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.
phenylephrine methscopolamine
Applies to: SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine), SymPak (chlorpheniramine / guaifenesin / 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.
Drug and food interactions
chlorpheniramine food
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine), SymPak (chlorpheniramine / guaifenesin / 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.
codeine food
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
Do not use alcohol or medications that contain alcohol while you are receiving treatment with codeine. This may increase nervous system side effects such as drowsiness, dizziness, lightheadedness, difficulty concentrating, and impairment in thinking and judgment. In severe cases, low blood pressure, respiratory distress, fainting, coma, or even death may occur. With certain long-acting formulations of narcotic pain medication, consumption of alcohol may also cause rapid release of the drug, resulting in high blood levels that may be potentially lethal. Talk to your doctor or pharmacist if you have questions on how to take this or other medications you are prescribed. Do not use more than the recommended dose of codeine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medication without first talking to your doctor.
methscopolamine food
Applies to: SymPak (chlorpheniramine / guaifenesin / 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.
phenylephrine food
Applies to: SymPak (chlorpheniramine / guaifenesin / 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.
pseudoephedrine food
Applies to: Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
Both pseudoephedrine 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.
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.
Antihistamines
Therapeutic duplication
The recommended maximum number of medicines in the 'antihistamines' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'antihistamines' category:
- Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
- SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine)
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.
Decongestants
Therapeutic duplication
The recommended maximum number of medicines in the 'decongestants' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'decongestants' category:
- Decohistine DH (chlorpheniramine / codeine / pseudoephedrine)
- SymPak (chlorpheniramine / guaifenesin / methscopolamine / phenylephrine)
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.
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
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. | |
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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