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.
Some individuals who are going through antidepressant withdrawal can find themselves at the mercy of hair-trigger symptoms that register as intense anxiety, aggression, and insomnia looked increasingly like a drug-related syndrome.
Vicodin overdose is an extremely common occurrence, as individuals who abuse the drug can sometimes take more of the drug than their body can sufficiently process.
There are some indications that marijuana products called spice may be associated with more health risks than regular marijuana.