I'm taking aleve (naproxen) for mild knee injury. while getting allergy shots will it minimize reactions? can it mask reactions? should i let my allergist know?

Yes.A simple phone: call to your Dr's nurse with the above info and a call back number,if needed,can be the easiest way to get word to Doc.Aleve (naproxen) should not affect your allergy shots in any way.

Allergy shots: There is no general consensus about the use of NSAIDs during allergy shots. Some allergists recommend avoiding exercise and NSAIDs after a shot others do not. Check with your allergist. NSAID use is avoided for 72 hours prior to testing, for the reasons you mentioned.