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Timoptic Warnings and Precautions

In order to help minimize risks, warnings and precautions for Timoptic should be reviewed with your healthcare provider before treatment begins. Be sure to talk to your healthcare provider before using Timoptic if you have myasthenia gravis, asthma, or heart failure (as the medication could worsen these conditions). You should avoid using this medication if you have severe COPD, bradycardia, or cardiogenic shock.

What Should I Tell My Healthcare Provider Before Using Timoptic?

You should talk with your healthcare provider prior to using Timoptic® (timolol maleate) if you have:
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
Make sure to tell your healthcare provider about any other medications you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.

Specific Timoptic Warnings and Precautions

Warnings and precautions to be aware of prior to taking this drug include the following:
  • Even though Timoptic is an eye drop, a significant amount of the medication may be absorbed into the bloodstream. Therefore, most of the usual warnings of precautions with other beta blockers also apply to Timoptic.
  • Beta blockers can worsen breathing problems like asthma or COPD. In many cases, Timoptic is not recommended for people with such lung problems.
  • Like all beta blockers, Timoptic can worsen heart failure in some situations. If you have heart failure, your healthcare provider may need to monitor you very closely while you take Timoptic. Let your healthcare provider know immediately if your heart failure symptoms seem to worsen.
  • Timoptic can worsen myasthenia gravis symptoms or may even potentially cause myasthenia gravis. Let your healthcare provider know if you develop symptoms of this problem, such as muscle weakness, double vision, or a droopy eyelid.
  • If you will be having surgery, make sure your surgeon and anesthesiologist know you take Timoptic, as it may affect the choice of medications used during the surgery.
  • Beta blockers can mask some of the symptoms of low blood sugar (hypoglycemia), particularly the "racing heart" feeling. This can cause serious problems for people with diabetes, who need to be able to sense that they have low blood sugar (in order to correct it before it becomes life-threatening). Some beta blockers may also worsen low blood sugar, although it is not known if this is a problem for Timoptic.
  • Beta blockers can mask some of the symptoms of an overactive thyroid (hyperthyroidism).
  • Timoptic can potentially interact with a number of other medications (see Timoptic Drug Interactions).
  • Timoptic should not be used alone for treating closed angle glaucoma.
  • Timoptic can worsen allergic reactions and may make epinephrine (one of the standard treatments for life-threatening allergic reactions) less effective. If you have a history of severe allergic reactions, Timoptic (or any other beta blocker) may not be the best choice for you.
  • Timoptic is considered a pregnancy Category C medication. This means that it may not be safe for use during pregnancy, although the full risks are not currently known (see Timolol and Pregnancy).
  • It is not known if Timoptic passes through breast milk in humans. Therefore, if you are breastfeeding or plan to start breastfeeding, discuss this with your healthcare provider prior to taking the drug (see Timolol and Breastfeeding).
The Dirty, Messy Part of BPH

Timoptic Medication Information

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