Allergic reactions including unexplained wheezing, shortness of breath, passing out, or swelling of the face and throat have occurred very rarely.
Undesirable effects involving the skin include pruritus (itch), rash, urticaria (hives) and extremely rare cases of angioedema (rapid swelling beneath the skin) and bullous (large skin blister) eruption including Stevens-Johnson syndrome, erythema multiforme, and toxic epidermal necrolysis (severe allergic reactions characterized by separation or exfoliation of tissue) have been rarely reported.
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