**Question:** Side effects of cisplatin include all of the following EXCEPT:

A. Hair loss
B. Nausea and vomiting
C. Hypersensitivity reactions
D. Increased risk of secondary malignancies

**Core Concept:** Cisplatin is an antineoplastic drug primarily used in the treatment of testicular and ovarian cancers, as well as some types of head and neck, lung, and bladder cancers. It works by forming DNA adducts, leading to cell cycle arrest and apoptosis. However, it can also cause various side effects due to its toxic nature.

**Why the Correct Answer is Right:**

The correct answer, **D. Increased risk of secondary malignancies**, is not a side effect of cisplatin. Cisplatin does not directly increase the risk of secondary malignancies, as the drug's mechanism of action (forming DNA adducts) primarily targets cancer cells, reducing their growth and survival. In comparison, secondary malignancies are caused by genetic predispositions, environmental factors, or pre-existing dysregulation in DNA repair mechanisms that result in uncontrolled cell growth.

**Why Each Wrong Option is Incorrect:**

A. **Hair loss (alopecia):** Cisplatin can cause hair loss due to its effects on the hair follicle cells. It directly damages the rapidly dividing cells in the hair follicles, leading to hair loss.

B. **Nausea and vomiting:** Cisplatin can cause nausea and vomiting as a result of its effects on the central nervous system and gastrointestinal tract. It acts on the chemoreceptor trigger zone (CTZ) in the area postrema of the medulla oblongata, leading to vomiting reflexes.

C. **Hypersensitivity reactions:** Cisplatin is not known to cause hypersensitivity reactions as it does not involve an immune response or antigen-antibody interactions. The side effects are primarily due to direct toxic effects on various tissues and organs.

**Clinical Pearl:** It is essential for healthcare providers to be aware of the common side effects of cisplatin, such as nephrotoxicity, ototoxicity, neurotoxicity, and myelosuppression, and monitor patients accordingly to manage these complications effectively.