What is the precautions for use of timoptic (timolol)?

Key Side-Effects: Timoptic (timolol) is one of the best tolerated anti-glaucoma medications. It's side effects include: red eye, heart-block (in patients with arrhythmia), aggravation of asthma, glucose intolerance (in diabetics), and finally in patients with hyperthyroidism, the drop can exacerbate withdrawal symptoms (palpitations, sweating, etc).

Timoptic (timolol): Allergies, lung disease, heart disease, kidney disease, liver disease, overactive thyroid, diabetes, muscular disease, cerebrovascular insufficiency, prior to surgery, blurred vision, pregnancy & breastfeeding.