It's not a good suggestion to begin any various other therapies while using Viagra, such as indinavir, cimetidine, erythromycin, isoniazid, fosamprenavir, imatinib, delavirdine, saquinavir, bosentan, antidepressants, conivaptan, clarithromycin, atazanavir, nelfinavir, heart medicines, rifampin, telithromycin or antifungals.
However, a few people may experience small negative side effects at the start of the therapy, such as inflammation in the face, pain in the back, memory troubles, frustration, warmth in your neck or chest, stuffy nose, indigestion and other ones.
In some extremely rare cases clients on Viagra report priapism.