Dermatographism is the most common form of a subset of chronic hives, acknowledged as " physical hives ".
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Other side effects include fever, rash, dermatographism, hyperpigmentation, alopecia ( hair loss ) and Raynaud's phenomenon ( discoloration of fingers and toes ).
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It was first launched in the United States by the U . S . Food and Drug Administration ( FDA ) ( specifically at the 4 mg dose / strength ) for hay fever ( a . k . a . allergic rhinitis, SAR and PAR ); vasomotor rhinitis; mild urticaria; angioedema, dermatographism and allergic conjunctivitis.