Would you consider prescribing NAC for a patient with OCD and a documented sulfa allergy?

I would consider using NAC if needed in a patient with a documented sulfa allergy because, although NAC is a sulfur-containing compound, it is chemically different from sulfonamides.

However, as with any new medical trial on a patient, individual hypersensitivity is a possibility. Provided there is a...

Why would you use NAC at all in OCD, given the lack of positive results in the literature?