Miller, PhD. First of all, it enables people to ascertain whether the drug is useful for them personally, as every person may react differently to ED treatments. Dosage and Administration The suggested Viagra dosage is 50 mg, given about an hour before sexual activity. Some people may also have ringing in their ears tinnitus or dizziness. Free Viagra samples allow men to improve their sexual encounters without making an upfront purchase, which is an intriguing world. Consult your healthcare practitioner for specific guidance if you are uncertain about the right dosage or timing.Sildenafil Citrate Coupons, Prices, and Savings Card Brand Names: Revatio, Viagra Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn more. · The Answers You Need. Expert-reviewed resources to help you navigate your health journey, from A to Z and everything in between. Compare prescription drug prices and find coupons at more than 70, US pharmacies. Save up to 80% instantly! · But a KitKat bar is candy, right? The tax code says no. That’s because of one ingredient — flour. Section Tax defines candy as “a preparation of sugar, honey, or other natural or.