About Medscape Reference. Medscape Reference is the most authoritative and accessible point-of-care medical reference available to physicians and other health care professionals on the Internet and via mobile devices. Three distinct references, the Medscape Condition Reference, the Medscape Procedure Reference, and the Medscape Drug Reference make up Medscape Reference.
Benzodiazepines are a type of medication known as tranquilizers. Familiar names include Valium and Xanax. They are some of the most commonly prescribed medications in the United States. When people without prescriptions obtain and take these drugs for their sedating effects, use turns into abuse.
Around one pack per day is normal; more is high; 3 packs is very high. It takes a lot of time to smoke 60 cigarettes. Over a lifetime, smoking is measured in packs-per-day, per year. A person can have (had) a seven-pack-year history, for example, smoking a pack a day for seven years. This is considered low. 200 pack-years (4 packs a day for 50 years) is about as high as it gets.