Benzodiazepines while they are abused it is not a large percentage. Tolerance may develop to the sedative effect, but not to respiratory depression. Effects are very much like alcohol and withdrawal is essentially the same as alcohol. Treatment involves the use of long acting sedative hypnotics to lengthen and reduce the severity of withdrawal. V. Caffeine is the most sidely used social drug.
Withdrawal is mild, consists of headache, lethargy, irritability.
Some symptoms last about 5 days. Cocaine has had a resurgence of abuse and is the yuppie drug. There is mild physical dependence, withdrawal consists of sleeping, tiredness, and a greatly increased appetite. It may last 5 days. The depression that characterizes withdrawal leads to cyclic use.