The pill with imprint TEVA 5343 (White, Oval, 15mm) has been identified as Sildenafil Citrate 100 mg and is used for Erectile Dysfunction and Pulmonary Arterial Hypertension. It belongs to the drug classes agents for pulmonary hypertension, impotence agents and is not a controlled substance. Teva Sildenafil is a generic version of the brand-name medicine Viagra.