Dear abzeedappaalom, As you have not mentioned your age E.D. is due to many reasons though the above mentioned drugs are being used in ED. cases give better results in certain cases, but self medication
is harmful. as just for your knowledge yohimbine
may give bleeding from urethra hence mt advice will be if are having ED consult a sexologist
get know the cause and get properly treated don't go for over the counter , and advertised products.