I am on Levaquin, but my side effect is from reading these posts, not taking the drug. I have no patience with people that have no common sense. Yes, doctors should tell you about the drugs they prescribe, but it is your responsibility to ask about potential side effects, interactions with other drugs you are taking, etc. It is also your responsibility to read the detailed informa tion that comes with every prescription from a pharmacy that lists possible side effects, which ones are likely to go away after a dose or two, and which ones you should contact a doctor about. If you get the drug as a sample at your doctor's office, stop in at a pharmacy and ask for the information sheet or get on the internet and find it.
All antibiotics cause dstomach upset and sometimes diarrhea because they kill all the bacteria they find, the bad ones causing your infection as well as the good ones living in your digestive system that keep you healthy. All antibiotics can cause yeast infections for the same reason. As some smart European posters to this list suggested, eating yogurt with live acidophilus cultures or taking acidophilus pills from the healthfood store may mediate this effect.
Lastly, even if your doctors don't have common sense about the symptoms of an allergic reaction, you should know the signs, because severe reactions can lead to anaphylactic shock and even death. Rashes, hives, itching, dizziness, and shortness of breath ARE NOT SIDE EFFECTS! They are warning signs of an allergic reaction. You can become allergic to any drug at any time, even if you have taken it with no problem many times before, antibiotic allergies are very common, and it is vitally important for you to know what drugs you are allergic to because not every doctor reads every word in your medical file. I am allergic to sulfa drugs (which I learned from a severe case of hives while taking Bactrim), yet a doctor prescribed Celebrex for a knee injury, and if I hadn't known that Celebrex contained sulfa I would have been in trouble instead of safely taking sulfa-free Vioxx.
Bottom line, you are responsible for your own health, no one else. Know the difference between signs of an allergic reaction, standard side effects, and rare side effects that should cause concern. If you're concerned, CALL YOUR DOCTOR, HEALTH PLAN, or PHARMACIST rather than posting on an online newsgroup. It could save your life.