viarga/cialas/livetra are all pde5 inhibitors. i have used viarga and cialas and there is no way this is a good option for a weight loss drug,side effects include, sky rockets blood pressure, can interfere with ur vision, causes headaches, causes flushing, and in some cases even on low doses gives one heart palpitiations and many many more minor ones. i personally have used viarga short term, i have suffered from blood pressure, flushing, minor headaches and the heart palpitations. it is good preworkout drug. got so pumped i couldnt feel my hands, but at the cost of those every day side effects i could not use it. i was using a low dose aswell, 50mg( generic)
and u could say u see fatloss on these drugs as it creates blood flow and gives u a full pumped look, which might trick u into thinking ur leaning out, but really ur not. its like looking in the mirror after the gym, u always look bigger/leaner. realistically, ur not leaner and ur muscles are just full of blood.
and as far as getting erect while taking these, it will not happen unless u want it to happen. it does not just give u a hard on because u took the pill.