You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood. See more.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. Ask your doctor if you have any questions. Remove the cap by pushing it down and twisting it counter-clockwise. If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil. Use only the brand of this medicine that your doctor prescribed. Tell your doctor if sildenafil is not working well or if you are experiencing side effects. An inherited eye disease that affects the retina.WebSep 12, · Viagra is used to treat erectile dysfunction (ED). It decreases ED symptoms by helping you get and keep an erection. Erections happen when a protein called cyclic . WebJan 6, · a light-headed feeling, like you might pass out. Common sildenafil side effects may include: flushing (warmth, redness, or tingly feeling); headache, dizziness; . WebOct 1, · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines .If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date. Push the plunger of the syringe, then insert the tip into the bottle while holding the bottle upright on a flat surface. Tell your doctor if sildenafil is not working well or if you are experiencing side effects. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Sildenafil may cause side effects.