Revital capsules are over-the-counter multivitamin and mineral supplements that many people use to help meet daily nutritional needs. While generally considered safe for healthy adults, it is still advisable to consult your doctor before starting them, especially at your ages (50 and 48), to ensure they are appropriate for your individual health conditions and any medications you may be taking. Potential side effects are usually mild and may include stomach upset, nausea, or allergic reactions, but excessive or unnecessary supplementation can sometimes lead to nutrient imbalances or interactions with other medications. Seeking medical advice will help ensure you use them safely and only if truly needed for your health goals.