Although this is an old thread - and the poster is long gone - I appreciate the information. We learn from one another!
Thanks for sharing!
Regards,
~Tuck
Redheads do not absorb anesthetics and some pain medications the same way as others due to our mealnocortin-1 receptor. Here's a short article from the NIH on that: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1362956/ I am not sure about other meds, but these differences in anesthetics and pain meds are known.