What otc drugs are safe enough to be taken daily?

None: No drug, OTC or otherwise is 100% safe. Do not take any unless you have a health need for one. Discuss all your medications, OTC, herbals, nutritional supplements etc with your doctor. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.