Can anyone recommend a good alternative to pseudoephedrine for help with keeping eustachian tubes cleared up during a dive trip? Sudafed has long been in my dive kit but I recently learned it is illegal in Mexico (where I dive most trips) and people have been jailed for bringing it on vacation. I'm not willing to risk that so looking for an alternative. I have found plenty of lists of what doesn't work during my search but no positive alternative recommendations except Flonase, and I would rather not use a spray if I can help it. Thanks.