Do not use Timoptol if: allergic (hypersensitive) to timolol, beta-blockers or any of the other ingredients of Timoptol (see Description); with current or past respiratory problems such as asthma, severe chronic obstructive bronchitis (severe lung disease which may cause wheeziness, difficulty in breathing and/or long-standing cough); with heart problems; with slow heartbeat; with disorders of heart rhythm (irregular heartbeats); with heart failure ("cardiogenic shock" - a serious heart condition caused by very low blood pressure, which may result in the following symptoms: dizziness and lightheadedness, fast pulse rate, white skin, sweating, restlessness, loss of consciousness).
If unsure whether Timoptol should be used, talk to the doctor or pharmacist.