"If you play a Nicleback song backwards, you'll hear messages from the devil. Even worse, if you play it forward, you'll hear Nickleback." - Dave Grohl
If you are projectile vomiting, can you hold any oral medication in long enough to do some good?
Jeez. Dunno. Thought it might work in between the heav-hos.
Is this something for a queasy stomach? Like high octane pepto?
The only thing we carried was some ibuprofen and vitamins, and hardly ever used the Vitamin I. Every year someone gets Giardia or Lyme Disease and must see the Doctor.
If it was me, I'd just do my best to be hygenic, use common sense, and not take unnecessary risks when it comes to my safety, rather than carry a pharmacy in anticiaption of getting sick.
Also, being in good hiking shape when you start will help you avoid injury.
I should clarify my post, doxycycline stores well, in that it is a tiny pill that doesn't get gummy and melt like capsules can, not to mention it takes up a fraction of the space. DO NOT TAKE DOXYCYCLINE THAT IS OUT OF DATE, or any other drug in that family (they end in -cycline). Some have advocated carrying and using the two-dose regimine for attached ticks in Lyme country, if you are going to carry this stuff make sure you write the expiration date on it and replace it as needed, it is dirt cheap anyway.