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You may have overdid it, 103 is hot. My advice is to tell this to your doctor - he is more trained than we are to give real advice.
Got in and loved the tub for about an hour at 103 deg... Had one light beer during that time.
I have never had a problem with alcohol and hot tubbing.
I hope that your experiences with the tub get better and better, but understand that the tolerance of high temperatures is different for everyone. For one you may have a lower body temperature than average and so hotter temps are actually even hotter for you. (Most people are not exactly average and body temps can vary quite a bit.)The second thing to consider is that sitting in the tub will temporarily lower your Blood Pressure as the volume of blood is allowed to pass into more "plumbing" less liquid more plumbing = lower pressure.If you stand too quickly out of the tub when the BP is low you can feel light headed or even faint. Sit up on the edge and cool down before exiting and this should help prevent this as well work your way up to higher temps over time as you get more used to your body's reaction to the hot water. Alcohol, dehydration etc... can all increase the likelihood of such conditions.Happy Tubbin!
My doc had me on a low dose BP med, but since then I've lost about 45lbs. I think those meds might have helped caused this issue.