Welcome to DF JDaddy, thanks for sharing your story of your friend, always remember in the future to utfse
in case there are similar postings, this would be included under 'potentiation', you may try searching the term and see what other threads are about regarding it.
It is likely because of the alkaseltzer buffering the pH ('potential of hydrogen' is it?) of your stomach affecting absorption, in this case, a positive effect on it, assisting with a more rapid absorption, not sure why it helps the rushes so much, I think it helps in that the adjusted pH literally destroys less drug
so your body has a chance to take in more of the complete dose than regularly without a buffer. Tums will work as well, anything which alkalizes your stomach acid. I believe alkaseltzer specifically, involves baking soda, I personally use a third to half a teaspoon of baking soda in brita filtered water (dont have a bacteriostatic filter yet) if I need rapid, within 30 minute, onset of my meds, works for my ibuprofen, oxycodone
and also kratom
tincure, have not used it with my other meds.