Common and Rare Reactions to Cephalexin
Common Cephalexin Side Effects
Cephalexin has been studied extensively in clinical trials, with thousands of people worldwide having been evaluated. In these studies, the side effects that occur in a group of people taking the drug are documented and are then compared to side effects that occur in another group of people not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
Based on these studies, the most common side effects with cephalexin occurring in either adults or children include:
- Upset stomach (dyspepsia)
- Unexplained rash
- Yeast infection.
Rare Cephalexin Side EffectsRare side effects with cephalexin occur in less than 1 percent of people taking the drug. Because these side effects are so uncommon, it is difficult to tell whether they are because of the medication or something else.
Some of these rare side effects include but are not limited to:
- Joint pain
- Bloody diarrhea
- Low platelets in the blood (thrombocytopenia)
- Vaginal discharge
- Serious intestinal infection (enterocolitis).