Broad spectrum antibiotics are most likely to cause side effects. This is because they target a wide range of bacteria, including both harmful and beneficial ones in the body. As a result, the use of broad spectrum antibiotics can disrupt the natural balance of the microbiome and lead to various side effects such as diarrhea, yeast infections, and allergic reactions. Narrow spectrum antibiotics, on the other hand, target specific types of bacteria and are less likely to cause such side effects.
