Black Cobra (Sildenafil Citrate) 150mg pills/tablets:,Black Cobra (Sildenafil Citrate) treats erectile dysfunction (trouble having an erection). Helps a man have an erection or have a better erection with his penis during sex. Also treats pulmonary arterial hypertension (high blood pressure in the lungs) in both men and women.,You can buy Black Cobra (Sildenafil Citrate) 150mg tablets online without prescription (No RX) from Amen – Online Pharmacy.