A major study in Ontario has catalogued 24 common medication chains, according to ScienceDaily. In these chains, a side effect from one drug is misinterpreted as a new medical condition, and the patient receives another prescription to treat it.

This cascade can expose patients to unnecessary medicines and additional side effects. The researchers behind the study say that closer medication reviews, greater involvement of pharmacists, and automated alert systems could help prevent such chains from continuing.

The findings highlight how easily side effects can be misread as new problems, especially when patients see different prescribers. The study's proposed safeguards aim to break the cycle before an additional drug is added.