Tums has the benefit of working almost immediately after taking it, but unfortunately, the effects do not last long. In general, each dose of Tums lasts for 1 to 3 hours and often lasts even shorter periods of time if taken immediately after food. How long do Tums last once opened? Tums usually have a shelf life of around 2-3 years from their manufacturing date. Once opened, they should be stored in a cool, dry place and tightly sealed to maintain their efficacy. It is important to check the expiration date on the packaging to ensure they are safe to use. Can expired antacids cause illness? How long TUMS lasts will vary between user and based upon the exposure to heartburn triggers. TUMS products are available in a range of forms and dosage strengths (500 mg, 750 mg, and 1000 mg). Here are the recommended dosages for adults and children 12 years and older. Each tablet of Tums Extra Strength 750 contains 750 mg of calcium carbonate. The recommended dosing is: Adults and adolescents ages 12 years and older: Chew 2 to 4 tablets (1,500 to 3,000 mg) when symptoms happen. Maximum dose: Don't take more than 10 tablets (7,500 mg) in 24 hours. Heartburn Treatment Download Article 1 Take 2-4 tablets unless otherwise directed if you are an adult. Most Tums products recommend taking doses of 2-4 tablets. However, some stronger products, like Tums Ultra, should be taken in doses of 2-3 tablets. When in doubt, read the label on your Tums product. 12 Dec, 2021 Do Tums Expire? TUMS or any other medication is tested for 4 to 5 years at different temperature and humidity conditions. At the end of these tests, expiry dates are assigned so that you know when your medications will no longer be effective without throwing them out prematurely! .

how long do tums last once opened