What are some common side effects of drugs?

• A. Hair growth
• B. Weight loss
• C. Nausea, dizziness, and drowsiness
• D. Improved memory

Answer: (C)

When a drug is taken, it aims to produce a therapeutic effect, but it can also affect other parts of the body. These unintended actions are side effects. Nausea, dizziness, and drowsiness are among the most common because they involve the body's central nervous system and digestive system, which are frequently influenced by many medicines. Nausea can arise from irritation of the stomach or signals reaching the brain’s vomiting center; dizziness can occur if the drug lowers blood pressure or affects balance pathways in the inner ear; drowsiness happens when the drug depresses CNS activity or has sedating effects. These broad, non-specific actions explain why this trio is a typical set of side effects across diverse drugs.

Hair growth isn’t a typical side effect for most medicines, though some specific drugs can affect hair. Weight loss can occur with certain drugs but isn’t a universal side effect. Improved memory is not a common or expected side effect of medications.