Tried 2 O.P.M.S. BLACK capsules. Contents on the back reveal a whopping 148mg(48%) mitragynine and <7mg of 7-OH per capsule. About 1.5 hours in, either mixed mu agonism with nmda antagonism or mu agonism, but noticeable tingle in lower extremities that i only get with ketamine or very rarely achieved through very strong opiates nowadays. Had i taken the 3rd one, i would have probably had to take a nap.
This is quite remarkable only because i have only been off of my suboxone a few weeks and i have a somewhat perma-tolerance from years of suboxone use.