Antihistamines in Dermatology — MCQs

A patient who experiences recurrent urticaria during exercise and heat exposure, including sunlight, most likely has:

All of the following statements are TRUE about second generation antihistaminic agents EXCEPT:

Second-generation cephalosporin that can be used orally is:

H1 antihistaminic having best topical activity is:

The skin condition shown in the image is associated with?

A 55-year-old woman presents with painful oral erosions and minimal skin involvement for 3 months. Nikolsky sign is positive on the oral mucosa. Serum is sent for autoantibody testing. Histology of a perilesional biopsy shows suprabasal acantholysis with a tombstone row of basal keratinocytes (Image). In this predominantly mucosal variant of pemphigus vulgaris, which autoantibody titre best correlates with mucosal disease activity and guides decisions about tapering systemic immunosuppression?

A 24-year-old man presents to the emergency department with a 3-day history of a rapidly spreading rash on his hands and forearms. He had a cold sore on his lip 10 days ago. He denies any new medications. There is no mucosal involvement. The rash is shown (Image 2). Which of the following statements best describes the underlying immunopathological mechanism responsible for this eruption?

Dapsone is used in which of the following conditions?

A male presents with an erythematous patch over the penis after taking an over-the-counter medication. What is the most likely causal drug?

Which of the following antifungal drugs is developing drug resistance and has not been prescribed for tinea cruris and tinea corporis for the last 2 years?