when to worry about drug or disease interactions with beta-blocker EYEDROPS for glaucoma

March 2010

We're getting questions about when to worry about drug or disease interactions with beta-blocker EYEDROPS for glaucoma.

Ophthalmic administration can result in significant blood levels.

ONE drop of timolol 0.5% in each eye can cause blood levels equivalent to taking 10 mg orally...a starting dose for hypertension.

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