Getting Relief from Metformin Diarrhea
Metformin is an effective and commonly prescribed medication used to treat type 2 diabetes. It works by improving insulin sensitivity and decreasing glucose production by the liver. However, one unpleasant side effect experienced by some people taking metformin is chronic diarrhea.
What Causes Metformin Diarrhea?
The exact mechanisms are unknown but a few possibilities exist:
- Increased bile acid malabsorption - metformin disrupts bile acid reabsorption in the intestines sending more bile to the colon which stimulates diarrhea.
- Changes to gut bacteria - metformin seems to encourage growth of bacteria that give off gases and irritants leading to diarrhea.
- Faster food transit - the medication may accelerate digestion meaning less water is absorbed resulting in loose, more frequent stools.
Stopping Metformin Diarrhea
If diarrhea due to metformin use is bothersome, there are some things you can try to ease symptoms:
Adjust Dosage
Talk to your doctor about reducing your metformin dose, then slowly increase back up over several weeks which allows your body to adjust. Extended release versions may also reduce diarrhea.
Manage Diet
Avoid greasy, fatty, processed, sugary and high fiber foods which are harder to digest. Stick to the BRAT diet - bananas, rice, applesauce and toast. Stay hydrated with electrolyte-rich fluids.
Supplements & Medications
Over-the-counter anti-diarrheal medications can provide relief in the short term. Probiotic supplements may help restore healthy gut flora for more lasting benefit.
Lifestyle Changes
Don't drink with meals as fluids dilute stomach acid needed to break down food. Exercise regularly to reduce glucose levels so less metformin is required. Quit smoking which exacerbates gastrointestinal issues.
Dealing with Persistent Diarrhea
Talk to your doctor if none of the above suggestions resolve metformin-related diarrhea. They may recommend:
- Switching diabetes medication
- Adding anti-diarrheal prescription medication
- Testing for lactose intolerance or celiac disease
- Assessing any related medications that could contribute
- Referral to a gastroenterologist
Metformin Benefits and Side Effects
While diarrhea affects some metformin users, it remains one of the most widely used and effective oral diabetes drugs. Understanding how it works and potential side effects can help manage expectations.
How Metformin Works
Metformin helps lower blood sugar levels by:
- Decreasing glucose production in the liver
- Improving insulin sensitivity and utilization in muscle tissue
- Slowing glucose absorption from food in the intestines
Together these mechanisms work to balance blood sugars and lower hemoglobin A1C levels.
Metformin Benefits
Some benefits beyond blood sugar control offered by metformin include:
- Weight loss - Improved insulin sensitivity promotes weight loss, especially when combined with diet and activity.
- Heart health – The medication seems to have a positive effect on cholesterol levels when used for over 10 years.
- Anti-cancer properties – Emerging research shows metformin may protect against and fight certain cancers.
Common Metformin Side Effects
In addition to diarrhea, possible side effects of metformin use involve:
- Stomach pain, nausea, vomiting
- Headache, weakness, dizziness
- Metallic taste in the mouth
- Appetite suppression and weight loss
These often resolve over time as your body adjusts. Let your doctor know if any worsen or severely impact your quality of life.
The Takeaway
Metformin offers effective blood sugar management with the added benefit of potential weight loss. But diarrhea from metformin can negatively affect lifestyle, nutrition and diabetes control. Thankfully several strategies exist to help reduce diarrhea and keep you on track.
Work with your healthcare providers to make dosage adjustments, treat contributing factors, supplement to improve digestion, switch medications if needed - so you can continue benefiting from metformin while avoiding unwanted bowel side effects.
FAQs
Why does metformin cause diarrhea?
The exact reasons are unknown but theories include metformin increasing bile acid malabsorption, altering gut bacteria, and speeding up digestion so less water gets absorbed.
How can I make metformin diarrhea go away?
Try adjusting your dosage slowly, sticking to a BRAT diet, taking anti-diarrheal medications, adding a probiotic, not drinking with meals, exercising more, or quitting smoking.
When should I call my doctor about metformin diarrhea?
Contact your doctor if lifestyle changes don't resolve diarrhea within a few weeks. They may adjust medications, test for other conditions, or refer you to a specialist to help manage side effects.
Can I keep taking metformin if I have chronic diarrhea?
Yes, your doctor can help find ways to manage diarrhea through supplements, additional medications, and exploring alternative diabetes drugs so metformin benefits aren't lost.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.
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