Mild forms of alcohol withdrawal can cause serious symptoms such as the shakes, seizures, and hallucinations, which commonly occur within 6-48 hours after the last drink.
An individual who is considering ending use of central nervous system depressants, or who has stopped and is suffering withdrawal should seek medical treatment due to the dangers involved in withdrawal from CNS depressants.
Abrupt cessation of benzodiazepine drug Ativan can cause withdrawal symptoms after taking medically prescribed doses of the drug for as little as one week.
The human body actually produces the chemical GHB naturally and in very small amounts.