Pharmacology: The active substance Latanoprost, a prostaglandin F2α analogue, is a selective prostanoid FP receptor agonist which reduces the Intra Ocular Pressure (IOP) by increasing the outflow of aqueous humor. Latanoprost has not induced fluorescein leakage in the posterior segment of pseudophakic human eyes during short term treatment. Latanoprost in clinical doses has not been found to have any significant pharmacologic effects on the cardiovascular or respiratory system.