Ativan official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. Product Type, HUMAN PRESCRIPTION DRUG LABEL, Item Code (Source), NDC Products containing less than 90 milligrams of codeine per dosage unit (Tylenol Xanax, Soma, Darvon, Darvocet, Valium, Ativan, Talwin, Ambien, Tramadol. Lorazepam | C15H10Cl2N2O2 | CID - structure, chemical names, physical and chemical properties, classification, patents, literature, NDC Code(s), , , , , , Chemical Names?: ?Lorazepam; Ativan; O-Chlor.