Careful though--almost no meds are available for any common stomach problem (looks like only one is milk of magnesia in that pic, and that was my experience as well).
I often get some stomach upset from traveling--richer food than normal, probably drinking less water than I normally do, etc.--and on one cruise I forgot to bring anything like Pepto tablets. Nothing in the shops! I'm guessing this has to do with them not wanting anyone to be "covering up" stomach problems that could be symptoms of norovirus or similar?
Anyhow, I'll never again make the mistake of cruising without my own stash of stomach meds--I'd bring Pepto tabs and immodium just in case!