(1) The only two classes of drugs that show any sign of modest increase - at least among 12 th graders - are barbiturate sedatives and minor tranquilizers.

(2) The third measure, polydrug use, is the sum of hallucinogen, amphetamine, barbiturate , cocaine, and heroin use.

(3) Other types of drugs, including barbiturates , sedative antidepressants, and antipsychotic drugs, are less preferred because of their side effects (which range from gastric irritation to high risk of addiction).

(4) Urine screening tests for drugs of abuse detect general classes of compounds, such as amphetamines, barbiturates , benzodiazepines, or opiates.

(5) We found minor differences in prevalence rates for some broad drug categories, such as cocaine, barbiturates , and amphetamines.

(6) Siva's devotees are forbidden to use drugs of abuse, such as cocaine, heroin, amphetamines, barbiturates , psychedelics and marijuana, unless prescribed by a licensed physician.

(7) In addition, there were also significant differences on use of hallucinogens, tranquilizers, barbiturates , and inhalants between these two groups.

(8) It is recommended, therefore, that the current study be replicated with less popular drugs of abuse, such as barbiturates , benzodiazepines, and methamphetamine.

(9) For example, because alcohol, barbiturates and sedative-hypnotics accelerate methadone metabolism, they foster withdrawal symptoms.

(10) Female adolescents with sexual abuse histories were also more likely to use hallucinogens, tranquilizers, barbiturates , and inhalants.

(11) Clearly, however, without further research, a presumption that temporal consistencies exist for other drugs, such as marijuana, barbiturates , and methamphetamine, would be an unsubstantiated one.

(12) Since then, more than 2,500 barbiturates have been synthesized, of which more than 50 have been marketed.

(13) Tranquilizers, amphetamines, barbiturates , marijuana, or hallucinogens were listed by the remaining 9% of the women as their primary drug.

(14) These drugs fall into three subgroups: barbiturates and barbiturate-like drugs, minor tranquilizers and alcohol.

(15) Random urine toxicology screens were done at admission and several times throughout the inpatient treatment program to confirm the absence of any cocaine, opiates, barbiturates , or benzodiazapines.

(16) The specific drugs included marijuana, cocaine, crack cocaine, PCP, barbiturates , and amphetamines.

(17) An attack can also be brought on as a result of withdrawal from alcohol or barbiturates ; extreme emotional distress, or fatigue.

(18) They note that sedative drugs such as benzodiazepines, barbiturates , deep sedation, and anesthesia may increase the amount of faster background EEG readings and interfere with interpretation.

(19) Until twenty years ago the main group of sedative drugs were the barbiturates , now almost entirely replaced by the benzodiazepines.

(20) He was addicted to tranquillisers and codeine tablets, taking up to 60 per day at one point, after he became hooked on the barbiturates during a period of depression.