instead of constantly rasing the dose just switch to a harder dissociative, if i was you id pick methoxetamine its a reasearch chemical and is widely available online because its still legal u need very small amounts of the drug to reach ketamine like efects the dosage is 20-30mg light dose 40-60mg standard 70+heavy, theres lots of good trip reports on erowid if ur interested i enjoy the stuff very much, no hang over at most 70mg will only last 6 hours but be warned this chemical is VERY potent theres a story of a kid taking 500mg just half a gram and going into a k-hole for over 48 hours he was in a hospital complete unconscious being monitered. hope u try it its a really fun drug if u enjoy dissociative sedatives(thts what dxm is lol)