Make sure you have discussed any other medications you are currently taking or plan to take before starting sildenafil with your doctor and pharmacist. How should this medicine be used? Do not take a double dose to make up for a missed one. Before taking sildenafil, tell your doctor and pharmacist if you are allergic to sildenafil, any other medications, or any of the ingredients in sildenafil tablet or suspension. Cialis stays in your system for up to 36 hours, and you can take it daily. You are encouraged to report adverse events related to Viatris products by calling U.VIAGRA is available by prescription only in 25 mg, 50 mg, and mg tablets. Patients should always ask their doctors for medical advice about adverse events. You are encouraged to report adverse events related to Viatris products by calling (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA.  · Drugs including Viagra and Cialis lead to an average improvement of 4 to 8 points on the scale used by researchers and clinicians. The team behind the new study suggests that exercise should be more regularly prescribed for people with ED. Not everyone wants to take pills for ED, and some aren’t comfortable with the side effects, .  · Fact-check: Sen. Melissa Agard says potato chips, Kit Kats and Viagra aren’t taxed in Wisconsin. Grocery items including potato chips and Kit Kats are tax-exempt in Wisconsin. Wisconsin has.