Mannitol peptide tablets in the instruction manual does not specify whether it should be taken before or after meals, but from the pharmacological point of view is generally considered to be better to take after meals. Mannitol peptide tablets are mainly composed of alpha-mannan peptide immune enhancers, is an oral drug, for the digestive tract absorption into the blood to play a role in the instruction manual does not clearly stipulate that should be eaten before or after meals, so eat before or after meals can be eaten, but from the point of view of the pharmacological considerations are generally considered to be better to eat after meals. Mannitol peptide tablets may appear after taking a transient fever or rash and other adverse reactions, rheumatic heart disease or allergy is prohibited, it should be noted that the drug properties change, pregnant women need to be used with caution. This drug should be used under the guidance of a physician.