Yeast tablets are contraindicated for those who are allergic to the product, and lactating women and pregnant women need to use it under the supervision of a physician. Yeast Tablet is a digestive aid and is used clinically to treat malnutrition, indigestion, and vitamin B deficiency. Generally, the drug is safe and does not cause significant side effects at the recommended dose. Overdose can cause diarrhea. The use of this drug is prohibited if you are allergic to yeast tablets, and allergy sufferers should also use it with caution to avoid itching, tingling, redness and swelling of the skin. Nursing women and pregnant women need to use it under the supervision of a physician to avoid any effect on the health of the baby or fetus. In addition, children must be used under adult supervision.