AlkaSeltzer original formula.... has only aspirin in it and bicarb.
The cold products are different.

I believe the bicarb blocks the histamine receptors, which cause alot of the burning type pain. I find it useful too for when you sort of just feel terrible and ache all over.

I use the Equate WalMart Brand. It is really helpful sometimes and not expensive. Just don't get "hooked" on it. Too much aspirin should be monitored by your doctor.

There is even an "aspirin" thread now on MS forum here.
http://neurotalk.psychcentral.com/sh...hlight=aspirin

Aspirin remains a very helpful drug for some issues today.

I prefer the AlkaSeltzer form of aspirin because it is soluble and less likely to cause bleeding in the stomach..it is absorbed very fast and doesn't hang around to irritate.

Speaking of awful nights... tonight is also an AlkaSeltzer night for me.
My left hip tendons are just awful yesterday and today. sigh (damage from an old fall).