A neurosurgeon has identified five classes of commonly prescribed drugs that may negatively impact brain health and cognitive function. These include anticholinergics, benzodiazepines, opioids, certain cancer treatments, and stimulants. Potential side effects range from memory impairment and confusion to altered brain structure and increased dementia risk. The neurosurgeon advises patients to proactively discuss neurological side effects with their physicians and carefully monitor medication use for long-term brain health.