10. Tetracycline

Image Credit

This antibiotic has been around for ages, and it is often very effective in treating acne. While it may help clear up those unsightly zits, it could also result in an equally unsightly side effect in the process. In children, it can cause their teeth to turn yellow. Permanently. Pregnant women are also advised to stay away from this drug, since it can cause the baby to be born with yellow teeth. Tetracycline might also make the skin more sensitive to the sun, meaning that sunburn may occur faster than normal. We’re not fashionistas by any stretch, so we’re now wondering how well red and yellow go together.