[refurb]

Ketamine gets more use in kids than adults because they tend to react better to the dissociative effects. Adults can become combative.

To your point, when the first dissociative hit the market, phencyclidine (PCP), it was a bit of a miracle drug. No respiratory depression, actually makes the heart beat a little stronger. It wasn't until the dissociative effects became more known was it withdrawn from the market.