Final answer:
Sulfa drugs are contraindicated in patients with G6PD deficiency as they can cause hemolysis.
Step-by-step explanation:
In patients with G6PD deficiency, certain classes of drugs are contraindicated. One of these classes is the sulfa drugs. Sulfa drugs, such as sulfadiazine, sulfamethoxazole, and sulfasalazine, can cause hemolysis in individuals with G6PD deficiency. These drugs should be avoided in patients with this condition to prevent complications.