Side effects of using Generic Alphagan (Brimonidine Tartrate):
The only side effects possible are some allergic reactions like difficulty in breathing, swelling of the lips, tongue and face and increased burning sensation around the eyes or within them. If these persist, you need to stop using generic alphagan and contact your doctor.
Some common effects are a feeling of tiredness, blurred vision and a mild stinging sensation upon administration. These are not serious and can be tolerated.