Question about cvs coupon restriction?

I got some CVS coupons but most of then show some specific conditions. Like one said $1off 2 Milka Bars. Can I use it for anything that I want? I tried once when I bought a toothbrush using this kind of food coupon and it did subtract 1 dollar. I used a self-checkout machine that time. But I'm not sure if I can... show more I got some CVS coupons but most of then show some specific conditions. Like one said $1off 2 Milka Bars. Can I use it for anything that I want? I tried once when I bought a toothbrush using this kind of food coupon and it did subtract 1 dollar. I used a self-checkout machine that time. But I'm not sure if I can really do that. It's kinda not the right thing to do.
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