In case you assume there was an overdose, name your nearby poison manipulate middle or ER right away. Symptoms of a completely awful reaction to the drug. These include wheezing; chest tightness; fever; itching; terrible cough; blue or grey skin color; seizures; or swelling of face, lips, tongue, or throat. Erection that lasts greater than 4 hours. Trouble respiration. In case you are affected by low blood pressure and cardiac-related troubles of high severity this remedy is typically now not advocated. Sildenafil may additionally engage and not work properly. Apart from this, it may reason life-threatening facet consequences such as heart attack, stroke, and so forth.