Kidney disease that needs to be treated with dialysis. Source Population All men in Gondar town that use sildenafil citrate for sexual function. A pretest was carried out on 5 sildenafil users that came to two randomly selected pharmacies in the town. The use of these substances along with sildenafil could lead to adverse consequences due to pharmacokinetic or pharmacodynamic interactions and could also lead to death at some point. However the dose is usually not more than 40 mg 3 times a day. The first part asked about the socio-demographic age, marital status, partner status, educational status, occupation, religion… and clinical characteristics of the study participants. Ask your healthcare professional how you should dispose of any medicine you do not use. · The effects may be increased because of slower removal of the medicine from the body. Leukemia (blood related cancer) or. Multiple myeloma (blood related cancer) or. Sickle-cell anemia (blood disorder)—Sildenafil should be used with caution in these patients as problems with prolonged erection of the penis may occur. About Viagra The generic name for Viagra is sildenafil. The drug also has another brand name: Revatio. It works by slowing down the action of PDE5, an enzyme in the blood vessel walls. This.  · 10 tips to use sildenafil (aka Viagra) effectively. A set of instructions should be given to patients on sildenafil: A minimum wait of 45 minutes to 1 hour is required between taking the tablet.