**Question:** All of the following drugs are contraindicated in patients with G–6–PD deficiency, EXCEPT:

A. Salbutamol (a bronchodilator used in asthma management)
B. Aspirin (an analgesic and anti-inflammatory agent)
C. Fluconazole (an antifungal agent)
D. Carbamazepine (an anti-epileptic and mood-stabilizing medication)

**Correct Answer:** **Option A: Salbutamol**

**Core Concept:** G6PD deficiency is a hereditary enzymopathy affecting the enzyme glucose-6-phosphate dehydrogenase (G6PD). This deficiency leads to increased risk of hemolysis (red blood cell breakdown) when exposed to certain drugs or foods.

**Why the Correct Answer is Right:** Salbutamol is a short-acting beta2-agonist bronchodilator used in asthma management. It is not a direct inhibitor of G6PD enzyme, and its use in asthma patients does not lead to hemolysis in healthy individuals.

**Why Each Wrong Option is Incorrect:**

A. **Option B: Aspirin**
Both G6PD deficiency and aspirin use can lead to hemolysis due to aspirin's role as a non-selective cyclooxygenase inhibitor, which inhibits the synthesis of prostaglandins. Aspirin use in G6PD deficient patients can cause hemolysis, making it a wrong choice.

C. **Option C: Fluconazole**
Fluconazole is an antifungal agent that does not directly affect G6PD enzyme function. Although some G6PD deficient patients may experience transient, mild hemolysis with fluconazole, it is not a consistent issue and is not applicable to all G6PD deficient patients.

D. **Option D: Carbamazepine**
Carbamazepine is an antiepileptic and mood-stabilizing medication that can cause hemolysis in G6PD deficient individuals due to its role as an inhibitor of G6PD enzyme, leading to increased oxidative stress and hemolysis.

**Clinical Pearl:**

Understanding the contraindications and potential risks associated with medications in patients with G6PD deficiency is crucial for safe patient care. In G6PD deficient patients, the use of drugs like aspirin and carbamazepine can lead to hemolysis, whereas the use of salbutamol and fluconazole usually does not pose a significant risk.