What is the standard Viagra dosage? Viagra dosage for erectile dysfunction (ED) is often 50-100 milligrams (mg), but those over 65 might begin at 25 mg. If you are taking sildenafil (Revatio) for PAH, take it as directed (the standard dosage is three times each day). Ortiz said that, as well as, Cialis could be taken both each day and on an as needed foundation so that your physique will be prepared for intercourse at a moment’s discover. But, from the viewpoint of the manufacturers, the unhealthy info is that, in the event that they declare something with reference to the medicine' "efficacy", there's a legally enforceable accountability to go on to supply all the same old safety and menace data. Drug disposal: Flush doubtlessly dangerous drugs. Meaning we might be bombarded with a spread of messages reminding us of the drug. The most notable decreases in blood stress for these with PAH may be seen within 1 to 2 hours after administration with Revatio.