customs

What exactly are we allowed or not allowed to bring-- like over counter meds asprin, pepto, ect. Are perscription meds in original container with Dr. name OK?

See here for a comprehensive and authoritative description:

https://consulmex.sre.gob.mx/reinounido/index.php/es/servicios-a-extranjeros/79

I don't know what we're "allowed" to bring into Mexico but I have always brought in OTC medicines in the original containers and my prescription drugs with appropriate doctor's prescription on the bottles. I even bring in plenty of assorted vitamins in daily sorter containers and have never been questioned about any of it. I guess I'm just lucky...or don't look like a drug dealer.