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Drug Interactions between Combigan and Cosopt

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

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Interactions between your drugs

Moderate

timolol ophthalmic brimonidine ophthalmic

Applies to: Combigan (brimonidine / timolol ophthalmic) and Cosopt (dorzolamide / timolol ophthalmic) and Combigan (brimonidine / timolol ophthalmic)

After using brimonidine ophthalmic, some of the medication may be absorbed into the bloodstream and occasionally produce cardiovascular side effects such as decreases in blood pressure and heart rate. Combining it with timolol ophthalmic or other medications that can also have these effects may increase the risk. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart beat. These side effects are most likely to be seen at the beginning of treatment, following a dose increase, or when treatment is restarted after an interruption. Let your doctor know if you develop these symptoms and they do not go away after a few days or they become troublesome. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Avoid driving or operating hazardous machinery until you know how the medications affect you, and use caution when getting up from a sitting or lying position. 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

No alcohol/food interactions were found. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

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

Beta-adrenergic antiglaucoma agents

Therapeutic duplication

The recommended maximum number of medicines in the 'beta-adrenergic antiglaucoma agents' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'beta-adrenergic antiglaucoma agents' category:

  • Combigan (brimonidine/timolol ophthalmic)
  • Cosopt (dorzolamide/timolol ophthalmic)

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.


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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.