Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. Patients taking concomitant inhibitors of CYP3A4 may benefit from initiation at the lower dosage. It is not indicated for children. Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient. A stronger CYP3A4 inhibitor such as ketoconazole or itraconazole could be expected to have greater effect than that seen with saquinavir. This activity describes the indications, actions, adverse effects, and contraindications of sildenafil as an agent in the clinical setting.Compare prices and print coupons for Viagra (Sildenafil) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ AdSwitch your scripts with ease & save big on select prescriptions. Restrictions apply. Walmart pharmacies make managing your prescriptions easy & affordable. Restrictions test1.ru Walmart Pay In Store · Curbside PickupServices: Curbside Pickup, Free 2-Day Shipping, Grocery Delivery.  · Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where .