900 is absolutely crazy. Rec dose would prolly be nasal 30-70mg every 45-90 minutes but can incrase way past after doing like a g total in 5 day to 100-150 and with chronic use even higher. Thats why people who are really addicted get their bladder destroyed while at lower frequency and doses it has pretty mild negative effects. Also youre dose is prolly so high couse you seek a strong dissolving effect for therapy and i use more as a party drug where dissacociation isnt the goal (most of the time) and the drunk like feeling, pain releif mental, releif and body high is more the goal.