The onset of action can occur within 30 minutes, while the duration of the effect can last up to 18 hours. Dosage and strength for pulmonary hypertension Sildenafil tablets for pulmonary hypertension come in 10mg and 20mg strengths. Read and follow these instructions carefully before you start using sildenafil and each time you get a refill of your medicine. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive. Keep out of the reach of children. Step 2: Generate a list of labs and make contact. The effects may be increased because of slower removal of the medicine from the body.Viagra Pills For Men Online Sale – Best Offers – Order Viagra(Sildenafil Citrate) Online. Extra Low Prices. HQ customer service. (Sildenafil Citrate) Advertisement. Global Rank. 3 M. Daily Visitors. 7 K. Daily Pageviews. 7 K. Load Time-Site Overview. The domain test1.ru was registered 1 year ago. The site is currently online. It. How much does sildenafil citrate or viagra cost near you? Find the best sildenafil citrate or viagra prices near you now with our cost comparison tool and start saving today. Sildenafil Citrate (Generic Viagra) $ Confirm your prescription details below for the most accurate pricing.