Answer: Not always. It’s best to check your chosen provider’s site for more information. If you take certain medications or have a medical condition, it might not be suitable for you. More harmful side effects tend to be uncommon or rare. Yes, ED pills can cause side effects. Viagra is the most recognizable and well-known ED tablet. It’s available in 10 mg and 20 mg tablets.TEST PRODUCT ONLY – ONLINE DOCTOR. View all Viagra Connect. DO NOT BUY! Test Product Only. This Item will not get delivered. More Details. This is a Pharmacy Medicine . Over the counter doses of Viagra. Currently the only dose of Viagra available over the counter in the UK is 50mg, which is available as Viagra Connect. Other doses may . Superdrug Online Doctor – our online Viagra service starts from £ including free delivery, or click and collect. You can also order up to 28 tablets with Superdrug Online .