A small yellowish pill with a capital letter m on one side and 751 on the other side

I googled this at:

round yellow M on one side 751 on other - Drugs.com

#1 round, dark yellow, with a big M on one side and 751 on the other
This pill is CYCLOBENZAPRINE 10 MG
A generic version of Flexeril
Imprint Code M / 751
Description butterscotch yellow, round tablet
You will find an image at mylanpharm.com
Info at cyclobenzaprine Side Effects, Interactions and Information - Drugs.com

Does it look like this?

http://www.drugs.com/images/pills/mm...aprine_hcl.jpg

http://www.drugs.com/images/pills/mm...aprine_hcl.jpg

If so it is Cyclobenzaprine, a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.

MRS.S