Final answer:
The drug that can cause a hypersensitivity reaction in patients with HLA-B*5701 is abacavir, commonly used in HIV treatment.
Step-by-step explanation:
The drug that can cause a hypersensitivity reaction in patients with HLA-B*5701 is abacavir, which is commonly used in the treatment of HIV infection. HLA-B*5701 is a specific genetic marker that has been associated with an increased risk of developing a hypersensitivity reaction to abacavir. This reaction can manifest as a variety of symptoms, including rash, fever, gastrointestinal symptoms, and respiratory distress. If a patient is found to have HLA-B*5701, it is recommended to avoid the use of abacavir to prevent the occurrence of this hypersensitivity reaction.