A common adverse response when a resident begins taking an antibiotic is?

When a resident begins taking an antibiotic, one of the most notable common adverse responses is an allergic reaction. This type of response can manifest in various ways, including rashes, itching, swelling, or more severe reactions such as anaphylaxis. The immune system may mistakenly identify the antibiotic as a harmful substance, leading to these allergic symptoms.

In the context of medication administration, it is crucial for a Certified Medication Aide to monitor for any signs of an allergic reaction, as they can occur rapidly and may require immediate intervention. Understanding this potential reaction is a vital part of ensuring resident safety and well-being, especially since allergic reactions can vary in severity and may pose serious health risks.

The other options, while they may relate to different medications or situations, do not represent the most common adverse response associated specifically with the initiation of antibiotic therapy. Increased urine output is generally not a standard response to antibiotics, tolerance usually develops with chronic use of certain medications rather than initiation, and Parkinsonian symptoms are not typically linked to antibiotics but rather certain psychiatric or neurological medications.