Alcohol Amphetamines Barbiturates Benzodiazapines Cocaine Methylphenidate Non-medical use/abuse: Used as a euphoriant Side effects : Severe: Acute emesis , blood disorders Atypical sensations : Dizziness, euphoria , lightheadedness, nausea, sweating, ureter spasm, urinary retention Cardiovascular : N/A Ear , nose , and throat : Hearing loss (with prolonged use) Endocrinal :