http://www.prescriptiondrug-info.com/threads/oval-shaped-pink-pill-M-4-S165230_s2.htm Recent Posts About oval shaped pink pill M 4 at The People's Medicine Community. medium oval shape pink pill with no writing on it. what can it be. perhaps energy? en-us Copyright 2009 Prescription Drug Info All Rights Reserved. 11/22/2009 4:31:55 AM 20 http://www.PrescriptionDrug-Info.com/threads/oval-shaped-pink-pill-M-4-S165230_s2.htm#181537 I located a pill with similar markings to a round, pink colored pill with M 4 on it, it's Magnesium Carbonate 400 mg, Calcium Carbonate 200 mg, and Folic Acid 1 mg, which is listed as a vitamin supplement. <br> <br>If this is not your pill, please post back so I can help you locate the correct one. Wed, 4 Nov 2009 17:00:22 -0800 http://www.PrescriptionDrug-Info.com/threads/oval-shaped-pink-pill-M-4-S165230_s2.htm#180936 There is no way to say for sure what it is, if there is no imprint on the tablet, very sorry. <br> <br>Legal US prescription drugs must all have unique imprints to enable their identification, otherwise it could be anything. <br> <br>Where did you find it? Wed, 28 Oct 2009 20:46:46 -0800