Background. Saquinavir is a protease inhibitor used for the treatment
of HIV infection. Adverse skin reactions have been rare. We report her
e the first case of erythema multiforme in a patient given saquinavir.
Case report. A 32-year-old man was seropositive for HIV and consulted
due to the development of round maculo-papular les ions centered on a
bulla and two erosive lesions of the palate five days after the intro
duction of saquinavir. Histology was compatible with erythema multifor
me. After withdrawal of saquinavir, the skin and mucosal lesions regre
ssed in 15 days, with no recurrence at 3 months. Discussion. Adverse s
kin reactions to saquinavir are exceptional (eruptions, pruritis). We
describe here the first case of erythema multiforme caused by saquinav
ir (imputability criteria I2 BO). Due to the structural analogy of saq
uinavir with other protease inhibitors (indiravir, ritonavir, nelfinav
ir) it would be difficult to prescribe a compound of the same class.