What happened to the need to stop using Viagra Sildenafil?

The adverse reactions of patients treated with sildenafil, Viagra  citric acid, are more common (the incidence is one in ten) : headache. The most common symptoms (from 1 percent to less than 1 in 10) are: dizziness, visual color distortion, visual disturbance, blurred vision, nasal congestion, nausea, indigestion;

Rare (incidence of 1 in 1000 to less than 1 in 100) symptoms: Rhinitis, hypersensitivity, lethargy, hypesthesia, tear secretion disorders, eye pain, photophobia, flash hallucinations, eye congestion, visual brightness, conjunctivitis, vertigo, tinnitus, tachycardia, palpitation, hypertension, hypotension, sinus congestion, gastroesophageal reflux disease, vomiting, epigastric pain, rash, myalgia, limb pain, urine is accompanied by blood, chest pain, fatigue, fever, rapid heart rate .