timolol

In rare cases, some people developed heart failure while they used beta-blocking medications like Istalol (timolol). People who already have heart failure might be at risk for worsening heart problems with this medication. Tell your healthcare team about your medical history. And talk to your primary care provider if you notice swelling in your feet or ankles, a fast or irregular pulse, or shortness of breath when you lie down or exercise. These might be signs of heart problems.

Beta blocker medications like Istalol (timolol) usually aren't recommended for people with lung problems, like asthma and COPD. This is because beta blockers can cause the airways to become narrower, which can make it harder to breathe. But the risk for breathing problems specifically with Istalol (timolol) isn't well known. Make sure your healthcare team knows if you have or have ever had any lung problems or conditions before you start using this medication to check whether it's safe for you.

Beta blockers can cause people with diabetes to not notice symptoms of low blood sugar, except for sweating and dizziness. It's possible for some Istalol (timolol) to be absorbed into your bloodstream and cause this effect. So though rare, it's important to be aware of this risk. Talk to your primary care provider to see whether you should check your blood sugar more often if you're using Istalol (timolol).

Beta blockers can cause people with an overactive thyroid to not recognize the signs of hyperthyroidism, such as a fast heart rate. It's possible for some Istalol (timolol) to get absorbed into your bloodstream and cause this effect. Although rare, it's good to be aware of this risk. Make sure your primary care provider knows that you're using Istalol (timolol) so they can monitor your thyroid problem more closely.