Is ketamine injections safe to take for pain? any serious drug interactions or allergic reactions?"

Ketamine: Should be administered by licensed professional with oxygen available and patient needs to be monitored. Do not try at home.

Ketamine: Is meant for anesthesia in specific situations. Not pain relief.

Depends: Ketamine has a number of uses. Its most common is as an intravenous analgesic. It is almost never used by itself because may cause hallucinations, nightmares and dysphoric reactions. It also increases blood pressure, causes nausea and has other side effects.