Question: how often can gtn be given?
Answer: If you're still in pain after 5 minutes you can have a second dose of 1 or 2 sprays under your tongue. If you're still in pain after 5 minutes you can have a third and final dose. Do not use more than 3 doses during an angina attack. 1 dose is either 1 tablet or 1 to 2 sprays.