What are the most common adverse effects of penicillins (PCNs)?

Penicillins are a class of antibiotics that are widely used to treat various bacterial infections. One of the most common adverse effects associated with penicillins is gastrointestinal issues. These can include symptoms such as diarrhea, nausea, and vomiting. The gastrointestinal tract can be impacted because penicillins can disrupt the normal gut flora, leading to an imbalance of bacteria. This imbalance can result in gastrointestinal disturbances, making it a frequent complaint among patients receiving these antibiotics.

It's also worth noting that while other side effects can occur, such as cardiovascular issues or neurological effects, they are less commonly associated with penicillins compared to gastrointestinal complications. Respiratory complications can occur in specific situations, such as allergic reactions, but again, they are not as prevalent as GI issues. Understanding these common side effects is essential for patient management and counseling during antibiotic therapy.