Also, almost all generics that you get from overseas and the liquid forms are way the fuck underdosed. I know my exact symptoms based on the stuffy nose and flushing almost precisely to the exact milligram. I ordered a bottle of the liquid stuff that had 50, 50 mg doses. BULLSHIT! I literally had to take almost half of the bottle before I felt the effects that I do with 100 mg tablet of regular generic Viagra. I kept loading up the 1 mm dropper and waiting 5 to 10 minutes and feeling nothing, then doing another and another and another and another until finally I noticed a little bit of stuffy nose. Per my calculations there should be 2500 mg in the bottle I purchased, and there was probably about 300 to 500 milligrams in it. And I found all of those research places to Dose about the same.
Most of the stuff from India is dosed at about 40-50% so keep that in mind also when you're evaluating your tolerance level. If you're taking a 20 mg dose of Cialis daily and it's from India it's probably actually 10 mg