The recommended dose of Viagra is 50 mg taken as needed about one hour before sexual activity. This is not only because the pharmacists are able to offer professional medical advice minor ailments , but also because many medicines are available to buy over the counter without a prescription. What is Viagra used for? Expand section Collapse section What is Viagra? In addition, there were studies in patients with spinal cord injury and with diabetes. New legislation introduced in meant that certain medications in higher doses such as Ibuprofen mg, Omeprazole, certain cough mixtures, and antihistamines had to be prescribed by a medical professional. Free Health Check-Ups In many pharmacies, you can get certain health checks and treatments done for free including your cholesterol levels , blood pressure monitoring, and heart health checks.Quite possibly. Many drugs that are prescription only in UK are available over the counter in Spain. I forgot to take my prescription indigestion tablets with me a couple of weeks . Because Viagra has not been studied in patients with severe liver disease, hypotension (low blood pressure), recent stroke or myocardial infarction (heart attack), or a hereditary . Sure. In Spain, many prescription drugs are sold over the counter. Cialis and Viagra too.