As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. Medicines that block an enzyme called CYP3A4. There are also case reports associating the use of Sildenafil with recurrent epistaxis. In Ethiopia alcohol, khat Catha edulis , and tobacco are the most frequently used recreational substances and the rate of substance use is increasing, particularly in the younger population 12 , The most common side-effects associated with the use of sildenafil as reported by the study participants were dizziness and headache.Brand names for sildenafil include Viagra, Revatio, and Liqrev. The cost for sildenafil oral tablet mg is around $10 for a supply of 2 tablets, depending on the pharmacy you . Viagra mg – Sildenafil Pills. To report any serious adverse events associated with the use of this drug. This drug is more popular than comparable drugs. It is available in generic and brand versions. The cost for sildenafil oral tablet mg is around $10 for a supply of 2 tablets, depending on the pharmacy you visit. 20 mg sildenafil oral tablet. from $ for 10 tablets. Quantity Per unit Price; $ This is a drug discount program, not an insurance plan. Valid at all major chains including Walgreens, CVS Pharmacy, Target.