Drug Interactions With Dorzolamide/Timolol

More Information on Drug Interactions With Dorzolamide/Timolol Interactions

The following sections explain in detail the potentially negative interactions that can occur when dorzolamide/timolol is combined with any of the drugs listed above.
 
Calcium Channel Blockers
Combining dorzolamide/timolol with calcium channel blockers may cause dangerously low blood pressure and, with certain calcium channel blockers, may cause a dangerously slow heart rate (bradycardia). You may need to be monitored closely for such interactions if you take these drugs together. In some cases, dorzolamide/timolol should not be combined with a calcium channel blocker.
 
Clonidine
Stopping clonidine without stopping dorzolamide/timolol could increase the risk of dangerously high blood pressure, strokes, and other serious problems. This is more common with oral beta blockers, but could happen with dorzolamide/timolol as well. If you need to stop taking clonidine and you are taking dorzolamide/timolol, ask your healthcare provider for further instructions.
 
CYP 2D6 Inhibitors
Dorzolamide/timolol is metabolized by a specific liver enzyme known as CYP 2D6. Medications known as CYP 2D6 inhibitors slow down the activity of this enzyme, causing an increase in the level of dorzolamide/timolol in the blood. This could lead to serious side effects of dorzolamide/timolol.
 
Different drugs inhibit the enzyme to different extents; some interactions may be minor, while others may be quite severe. Check with your healthcare provider before combining dorzolamide/timolol with a CYP 2D6 inhibitor.
 
Digoxin
Combining dorzolamide/timolol with digoxin may cause a dangerously slow heart rate (bradycardia). You may need to be monitored very closely if you take these drugs together. In some cases, dorzolamide/timolol should not be combined with digoxin.

Dorzolamide/Timolol Drug Information

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