This is a generic brand of Viagra and even Viagra works differently with different people mostly depending on their metabolism. I have several friends that have to take Viagra hours in advance. For them it seems to kick in between 4 to 6 hours and last another 8.
I have read various reports stating the wide variations, do not expect to take it on the way to the bedroom. If you know your normal digestion times use this for you time table.
I recommend that any guy having erectile dysfunction see his doctor for advice including any medications and followup. With Internet pills it is difficult to know the proper dosage along with knowing what exactly the pills contain and dealing with any side effects. With your purchase, is there any chance of a money-back-guarantee?