Generic Olopatadine hcl - Patanol
Generic Patanol is an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of itching or watery eyes. Generic Patanol is used to treat ocular (eye) symptoms of allergic conditions, such as inflammation, itching, watering, and burning.
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Regarding the effect: I do notice an increase in bloodflow and a better stamina using the pills (I use 50mg). A side-effect I have noticed is that my nose clogs up so I seem like I have a cold for an hour or so after taking one pill. No other side-effects than that.