G.F.
I've not used any of those items BUT I buy generic tylenol cold, ibuprofen, zyrtec. What I do is always read the ingredient label..if you can, hold both of them side-by-side to compare. Most of the items I have done this to are the exact same product..just a different name. I picked up this generic brand of some facial cleanser..it even had the company name of the regular item written on the back.