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Betimol Warnings and Precautions

Before you start taking these eye drops, warnings and precautions for Betimol should be discussed with your healthcare provider. It is important to know that Betimol can worsen heart failure, breathing problems (such as asthma or COPD), myasthenia gravis, and various other conditions. You should not use this medicine if you have second or third degree heart block, severe heart failure, or cardiogenic shock.

What Should I Tell My Healthcare Provider Before Taking Betimol?

You should talk with your healthcare provider prior to taking Betimol® (timolol) 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 Betimol Warnings and Precautions

Warnings and precautions to be aware of prior to taking Betimol include the following:
  • Even though Betimol is an eye drop, a significant amount of the medication may be absorbed into the bloodstream. Therefore, most of the usual warnings or precautions with other beta blockers also apply to Betimol.
  • Betimol 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, Betimol (or any other beta blocker) may not be the best choice for you.
  • Like all beta blockers, Betimol 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 Betimol. Let your healthcare provider know immediately if your heart failure symptoms seem to worsen.
  • Beta blockers can worsen breathing problems like asthma or COPD. In many cases, Betimol is not recommended for people with such lung problems.
  • Betimol can worsen myasthenia gravis symptoms or may even 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 Betimol, 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 Betimol.
  • Beta blockers can mask some of the symptoms of an overactive thyroid (hyperthyroidism).
  • Betimol can potentially interact with a number of other medications (see Betimol Drug Interactions).
  • Betimol should not be used alone for treating closed angle glaucoma.
  • Betimol 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 Betimol 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).
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