N&PD Moderators: Skorpio Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why do codeine and hydrocodone have the same formula but different highs? JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. Members who reacted to message #2 All (2) Heart (1) Like (1) Aug 1, 2020 Jabberwocky Frumious Bandersnatch · From Looking-Glass Land Messages 1,256 Reaction score 879 Points 545 Aug 1, 2020 Hylight Bluelighter Messages 9,531 Reaction score 8,615 Points 245 Loading… Loading… Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why do codeine and hydrocodone have the same formula but different highs?