Not Medical Advice: There is no hexagon shaped pill with M 75 imprint. But, we found a hexagon shaped pill with imprints W 75 and M 25. A pill with imprint M 75 is round-shape.
An orange, six-sided pill with W 75 imprint has been identified as Ranitidine hydrochloride 75 mg.
Ranitidine belongs to the drug class H2 antagonists or histamine-2 blockers. It works by reducing the amount of acid your stomach produces.
Ranitidine is used in the treatment of gerd, zollinger-ellison syndrome, erosive esophagitis, gastric ulcer maintenance treatment, duodenal ulcer and more.
Check out 7 Tips for Managing Stomach Ulcers, shared by Healthgrades.