Viagra ( Sildenafil 50mg ) 4 Film-coated Tablets _ Pfizer

Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation . This increased blood flow can cause an erection . Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily . If you are self-treating with this medication, it is important to read the manufacturer’s package instructions carefully so you know when to consult your doctor or pharmacist .