Do not keep outdated medicine or medicine no longer needed. This medicine comes with a patient information leaflet. Viagra hanya boleh digunakan sekali sehari dalam kurun waktu 24 jam. Click here for an email preview. Sildenafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. · For treatment of erectile dysfunction: For oral dosage form (tablets): Adults up to 65 years of age—50 milligrams (mg) as a single dose no more than once a day, 1 hour before sexual intercourse. Alternatively, the medicine may be taken 30 minutes to 4 hours before sexual intercourse. Your doctor may adjust your dose if needed. How to use. Please read the enclosed leaflet carefully before use. • take 1 tablet approximately one hour before sexual activity. • swallow tablet whole with water. • do not take more than 1 tablet a day. Viagra Connect starts to work within minutes. You may take it up to 4 hours before sexual activity. Oral use. In the United States, chewable ED tablets are available only through the online subscription service BlueChew. According to the company site, it makes chewable versions of sildenafil.