“For several years I have suffered from Uveitis and Macula Odema in one eye. The Macula Odema has settled but the Uveitis is only controlled with Corticosteroid eye drops. I tried to gradually reduce the corticosteroid drops and replace them with the carnosine, but this was not entirely successful and after a visit to the Specialist I am back using the coticosteroid drops. I didn't know whether it would be of any value to use both at the same time. What the Carnosine did do was reduce the pressure and as both my parents had glaucoma I am very conscious of the need to keep the pressure down. So I may need to use the carnosine for that in the future and of course I realize that extended use of the steroid drops can cause cataracts.”
Prostaglandin analogs may cause changes in iris color and eyelid skin, growth of eyelashes , stinging, blurred vision , eye redness, itching, and burning. Beta blockers' side effects include low blood pressure , reduced pulse rate , fatigue , shortness of breath, and in rare occasions, reduced libido and depression . Alpha agonists can cause burning or stinging, fatigue, headache , drowsiness , dry mouth and nose , and also they have a higher likelihood of allergic reaction. Carbonic anhydrase inhibitors may cause stinging, burning, and eye discomfort. 
The following adverse reactions are classified according to the following convention: very common (≥1/10), common (≥1/100 to <1/10), uncommon (≥1/1,000 to <1/100), rare (≥1/10,000 to <1/1000), very rare (<1/10,000) or not known (cannot be estimated from the available data). Within each frequency grouping, adverse reactions are presented in decreasing order of seriousness. The adverse reactions were obtained from clinical trials and post-marketing experience for MAXITROL eye drops and MAXITROL eye ointment.