Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. Use the oral syringe provided with your medication to measure and take your dose. What special dietary instructions should I follow? You can take sildenafil with or without food.1 SAV – South America Voyager Medellin, Colombia Destination Expert for Colombia, Ecuador, Medellin, Bogota, Cartagena Level Contributor 7, posts reviews helpful votes 1. Re: Is Sildenafil (Viagra) in Bogota??? 3 years ago Save Yes available at every pharmacy. Viagra 50 mg Caja Con 4 Tabletas Rx. Nuestros productos provienen de Laboratorios certificados y registrados ante INVIMA en Colombia, brindando Confianza y Seguridad a nuestros clientes. Nuestra Droguería realiza Domicilios a todo el país, si tiene s dudas con el precio de tu producto llámanos. Puedes hacer tus pedidos las 24 horas en. VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not take VIAGRA if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke.