Pregnancy Medications The U.S. Drug and Food Administration (FDA) has issued criteria for the risk class for pregnancy as follows: Class A: Controlled studies have shown no harm. Such drugs have been shown to have no adverse effects on the human fetus and are the safest. Class B: No evidence of harm to humans. Animal experiments have shown harm to fetal animals, but no proven harm to fetus in humans, or animal experiments have shown no harm to fetal animals, but no adequate studies have been done in humans. Category C: No harm can be excluded. Animal experiments may be harmful to fetal animals or lack of research, in humans there is a lack of relevant research, but the benefit to pregnant women outweighs the harm to the fetus. Category D: Harmful to the fetus. Market research or studies have confirmed harm to the fetus, but the benefit to the pregnant woman outweighs the harm to the fetus. Category X: Prohibited during pregnancy. A drug that is prohibited during pregnancy when human or animal studies or market research have shown that the harm to the fetus exceeds the benefit to the pregnant woman. Class criteria for commonly used drugs I. Antihistamines: paracetamol (B), cimetidine (B), diphenhydramine (B), promethazine (C) II. Anti-infectives 1. Anthelmintics: gentian violet (C) 2. Antimalarials: chloroquine (D) 3. Antitrichomonials: metronidazole (B) 4. Antibiotics: butamycin (C), gentamicin (C), kanamycin (D), neomycin (D) Cephalosporins(B), Streptomycin(D), Penicillin(B), Tetracycline(D), Doxycycline(D), Chlortetracycline(D), Bacitracin(C), Chloramphenicol(C), Erythromycin(B), Lincomycin(B), Polymyxin B(B), Vancomycin(C) 5. Other antibiotics: Cotrimoxazole(B/C), Methomycin(C), Furazolidone(C), Anti-tuberculosis drugs: ethambutol (B), isoniazid (C), rifampicin (C), para-aminosalicylic acid (C) 7, antifungal drugs: clotrimazole (C), miconazole (C), mycobacterium (B) 8, antiviral drugs: amantadine (C), adenosine (C), virus azole (X), azidothymidine (C), acyclic ursine (C) III. ), cyclophosphamide (D), tumor coronene (D), cisplatin (D), cytarabine (D), vincristine (D), vincristine (D), thiotepa (D), erythromycin (D), adriamycin (D), fluorouracil (D), nitrogen mustard (D), mafran (D), methotrexate (D), vincristine (D) IV. Plant nervous system drugs 1. Cholinomimetics: acetylcholine (C), neostigmine (C) 2. Anticholinergics: atropine (C), belladonna (C), probenecid (C) 3, adrenaline-like drugs: epinephrine (C), norepinephrine (D), ephedrine (C), isoprenaline (C), m-hydroxylamine (D), dopamine (C), dobutamine (C), m-hydroxysalbuterol (B), hydroxibian hydroxyephedrine (B) 5, central nervous system drugs 1, central excitatory drugs. Caffeine (B) 2, antipyretic and analgesic drugs: acetylsalicylic acid (C / D), finasteride (B), sodium salicylate (C / D) 3, non-steroidal anti-inflammatory drugs: indomethacin (B / D) 4, analgesics: codeine (B / D), morphine (B / D), opioids (B / D), pethidine (B / D), naloxone (C) 5, sedative, hypnotic drugs: isopentobarbital (C), pentobarbital (C ), phenobarbital (B), chloral hydrate (C), ethanol (D/X), valium (D), nitro valium (C) 6, tranquilizers: haloperidol (C), chlorpromazine (C) 7, antidepressants: doxepin (C) 6, cardiovascular system drugs 1, cardiac glycosides: digitalis (B), digoxin (B), digitalis toxin (B), quinidine (C) 2, antihypertensive drugs: colistin (C), methyldopa (C), methylphenidate (C), methylphenidate (C). Methyldopa (C), hydralazine (B), sodium nitroprusside (D), prazosin (C) 3, vasodilators: isoamyl nitrite (C), pansentin (C), isosorbide dinitrate (C), nitroglycerin (C) vii, diuretics dihydrochlorothiazide (D), diuretic acid (D), tachyphylaxis (C), mannitol (C), aminopterin (D) viii, digestive system drugs compound camphor tincture (B / D) Nine, hormones 1, adrenal corticosteroids: cortisone (D), betamethasone (C), dexamethasone (C), hydrogenated prednisone (B) 2, estrogen: has enestradiol (X), estradiol (D), oral contraceptives (D) 3, progestin: progestin class (D) 4, hypoglycemic drugs: insulin (B), chlorosulfonylurea (D), methylsulfonylurea (D) 5, anti-thyroid drugs: propyl Thioxapyrimidine (D), Tabazol (D)