Infants and children are still in the growth and development stage, and the tissues and organs in their bodies are not yet mature. Weak resistance, prone to disease, in the use of drugs must be careful. Infants and young children need to prohibit (caution) drugs are introduced as follows: (1) drugs that can cause hemolysis or jaundice in newborns: antipyretic and analgesic drugs such as aspirin; antimalarial drugs such as primaquine, malaria quinine, quinine; furans such as furantin, dysentery; antibiotics such as neomycin, chloramphenicol, tetracycline, penicillin; central nervous system inhibitors such as chlorpromazine, fenadine, phenobarbital, chloral hydrate, ethanol, etc.. Others such as dimercaptopropanol, p-aminosalicylic acid, quinidine, vitamin K, methylene glycol, methyltestosterone, sodium benzoate caffeine, mountain pedicel theophylline, cidilan, toxic trichothecene K, toluene sulfobutylurea, etc. (2) Drugs that can cause neonatal methemoglobinemia: methylene blue, benzocaine, bismuth subnitrate and other nitrates. (3) drugs that can cause fetal and neonatal central depression and central nervous system damage: ether, chloroform, chloroane, nitrous oxide, tribromoethanol, chloral hydrate, barbiturates, morphine, codeine, dulcolax, valium, chlorpromazine, Librium and reserpine. (4) Other: furantadine, can cause polyneuritis; tetracycline, can cause vomiting, diarrhea, tooth enamel hypoplasia and yellow stain, and may not recede for life; adrenocorticotropic hormone, can cause cerebral edema, gastric ulcer, intestinal mucosa necrosis or perforation, osteoporosis, hypertension; licorice preparations and ephedrine, should be prohibited; erythromycin and stearic acid, can cause biliary depression hepatitis; hydrazinepyridazine, can cause erythema Lupus syndrome.