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.
Some Ketamine users report having a terrifying feeling of complete sensory detachment that has been likened to a near-death experience.
Withdrawal symptoms from hypnotic drugs such as barbiturates and benzodiazepines include shakiness and tremor, nervousness and anxiety, panic, hyperactivity and increased reflexes, rapid heart rate, and epileptic seizures and death in the most severe cases.
The effects of Dilaudid can be felt more gradually when taken orally as opposed to intravenously injecting the drug; the effects of which are almost immediate.