If liquid is injected into the muscle, less is needed to enter a K-hole. Effects can be felt within four minutes. If swallowed, the effects come on in 10 - 20 minutes. Some people become nauseous after taking ketamine. An ecstasy testing kit can be used to screen against fake ecstasy tablets .
Frequent use can cause disruptions in consciousness and lead to neuroses or other mental disorders.
Ketamine can cause a tremendous psychological dependence. The dissociation from one's consciousness experienced with ketamine can be highly seductive to some people, and there are many cases of ketamine addiction. Ketamine is illegal and possession can result in long prison terms.