This accidental death illustrates the dangers of becoming helpless in settings other than lying down on a bed. There are very rare cases of children who failed to breath for a minute or more following i.m. They can feel like 'severe gas pains, but much worse'. They tend to appear when the intoxication resolves. These pains may be irritable bowel syndrome triggered by the psychological changes discussed previously.
Movement disorders are possible.
A 20 year old, experienced user gave himself an i.v. injection. He was unable to speak but could still write. Whether ketamine is pro or anti-convulsant is an old controversy. It may be both. Rare side-effects include problems with the sclera and conjunctiva, and swelling around the eyes.