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 #8 All (1) Like (1) I Oct 28, 2022 isthastuff Greenlighter Messages 10 Reaction score 0 Points 270 Loading… Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why do codeine and hydrocodone have the same formula but different highs?