Non-pigmenting fixed reactions is caused by:
Non-pigmenting fixed reactions have been repoed with sympathomimetic agents pseudoephedrine, tetryzoline hydrochloride, difunisal, thiopental (thiopentone), piroxicam, Radiopaque contrast medium iothalamate, arsphenamine paracetamol. Ref: Rook's textbook of dermatology, 8th edition, Pg 75.48.
Sulphonamides
Ampicillin
Pseudoephedrine
Carbamazepine