White Pill M31

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Comments Submitted Says:

Round small pill with the imprint M | 31 (with a score line down the middle separating the M and 31)

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may Says:
via mobile

What is it and what is it prescribed for?

White pill, round split down the middle with M31 on it.

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Kevin Says:


I was looking at the NIH pill database and this is the information I found regarding a white pill imprinted with M;31.




Allopurinol 100 mg;

Mylan Pharmaceuticals Inc.






- Silicon Dioxide
- Magnesium Stearate
- Cellulose, Microcrystalline
- Starch, Corn
- Sodium Lauryl Sulfate
- Sodium Starch Glycolate Type A Potato

I hope this information was useful. Let me know if you have any other questions regarding this medication.

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Kim Says:
via mobile

Yes - what's it used for? Just gout, or other things?

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Roy Says:

Re: Kim (# 3)

This is from the DailyMed article:

Allopurinol tablets are indicated in:

1) The management of patients with signs and symptoms of primary or secondary gout (acute attacks, tophi, joint destruction, uric acid lithiasis, and/or nephropathy).

2) The management of patients with leukemia, lymphoma and malignancies who are receiving cancer therapy which causes elevations of serum and urinary uric acid levels. Treatment with allopurinol tablets should be discontinued when the potential for overproduction of uric acid is no longer present.

3) The management of patients with recurrent calcium oxalate calculi whose daily uric acid excretion exceeds 800 mg/day in male patients and 750 mg/day in female patients. Therapy in such patients should be carefully assessed initially and reassessed periodically to determine in each case that treatment is beneficial and that the benefits outweigh the risks.

Hope this helps!

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