Answer
It is contraindicated in people with asthma or a history of asthma because ophthalmic timolol can still trigger severe bronchospasm.
Sources for this answer
- Brimonidine tartrate/Timolol 2mg/ml + 5mg/ml eye drops, solution — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.