Have taken antibiotics in the past that have not been effective. Are currently taking another prescription or a nonprescription medication. As with all medications, antibiotics can cause side effects. Most are minor and do not last long. Side effects can include nausea, headaches, dizziness, or sensitivity to light.
Some patients are allergic to certain antibiotics, which can cause skin rashes or other reactions.
Antibiotics sometimes affect the levels of bacteria normally found in the body, which may result in diarrhea or a yeast infection. As a partner in your own health care, you should learn about possible side effects associated with antibiotics, and let your doctor or pharmacist know about any side effects immediately, especially if you are concerned, or if the side effects last more than a couple of days. Your doctor may suggest another treatment. Always discuss your treatment with your doctor and pharmacist, and ask for written information about your prescribed medicine. Drink a lot of fluids with any antibiotic during the course of your treatment.