Metformin is employed alongside a balanced diet and exercise regimen, and sometimes in combination with other medications, to manage elevated blood sugar levels. It is primarily utilized in patients diagnosed with type 2 diabetes. The regulation of high blood sugar aids in averting complications such as kidney damage, vision impairment, nerve disorders, limb amputation, and sexual function impairments. Effective management of diabetes can also lower the risk of experiencing a heart attack or stroke.

The mechanism of action of metformin involves facilitating the restoration of your body’s natural response to insulin. Additionally, it reduces the production of sugar by your liver and the absorption of sugar by your stomach and intestines.


Gabapentin is employed in conjunction with other drugs to prevent and manage seizures. Additionally, it is utilized to alleviate nerve pain that occurs after shingles (a painful rash resulting from a herpes zoster infection) in adult patients. Gabapentin is classified as an anticonvulsant or antiepileptic medication.

How to use gabapentin

Before starting gabapentin and each time you refill your prescription, read the Medication Guide and, if provided, the Patient Information Leaflet from your pharmacist. If you have any questions, consult your doctor or pharmacist.

Take gabapentin orally with or without food as instructed by your doctor. The dosage depends on your medical condition and response to treatment, and for children, it also considers their weight.

If your doctor advises splitting the tablet in half and taking the other half at the next dose, follow their instructions. Discard any unused half-tablets if not used within a few days. If you are taking capsules, swallow them whole with plenty of water.

Follow your doctor’s dosing instructions precisely. Initially, your doctor may gradually increase your dose during the first few days to allow your body to adjust to the medication. To reduce side effects, take the first dose at bedtime.

Take gabapentin regularly for optimal benefits. The medication is most effective when maintained at a consistent level in your body. Take it at evenly spaced intervals at the same time(s) daily. If you’re taking it three times a day for seizure control, don’t exceed 12 hours between doses to prevent increased seizures.

Do not alter the dosage or frequency without consulting your doctor, as doing so won’t accelerate improvement and may raise the risk of serious side effects.

Do not discontinue gabapentin abruptly without consulting your doctor, as some conditions may worsen with sudden cessation. Gradual dose reduction may be necessary.

Antacids containing aluminum or magnesium can affect gabapentin absorption. If you’re taking an antacid, take gabapentin at least two hours after the antacid.

Different gabapentin formulations (e.g., immediate-release, sustained-release, enacarbil sustained-release) are absorbed differently. Don’t switch formulations without consulting your doctor.

Inform your doctor if your condition doesn’t improve or worsens.

Read Also: M523 Pill: Uses, Dosage, Side Effects, Addiction – Meds Safety

Pros and Cons of metformin and gabapentin



  • Effective in managing blood sugar levels
  • Weight management
  • Cardiovascular benefits
  • Low risk of hypoglycemia


  • Gastrointestinal side effects
  • Lactic acidosis risk
  • Vitamin B12 deficiency



  • Effective for neuropathic pain
  • Seizure control
  • Minimal drug interactions


  • Sedation and dizziness
  • Dependency risk
  • Cognitive effects

Differences Between metformin and gabapentin


Primarily used for managing blood sugar levels in individuals with type 2 diabetes. It helps improve insulin sensitivity and reduce glucose production in the liver.


Used for treating neuropathic pain conditions such as diabetic neuropathy, postherpetic neuralgia, and certain types of seizures as an antiepileptic medication.

Alternative to metformin and gabapentin

Alternatives to Metformin

DPP-4 inhibitors (e.g., sitagliptin, saxagliptin):

Improve blood sugar control by increasing insulin secretion and reducing glucose production.

Alternatives to Gabapentin for Neuropathic Pain:


Similar to gabapentin, pregabalin is another antiepileptic medication used to treat neuropathic pain conditions.

Interactions between your drugs


Metformin belongs to the drug class known as non-sulfonylureas and is used to treat several conditions, including:

  • Type 2 Diabetes
  • Type 3c Diabetes (off-label)
  • Female Infertility (off-label)
  • Insulin Resistance Syndrome (off-label)
  • Polycystic Ovary Syndrome (off-label)

It’s important to note that metformin has interactions with a total of 365 other drugs.


Neurontin belongs to the drug class known as gamma-aminobutyric acid analogs and is used to treat the following conditions:

  • Epilepsy
  • Postherpetic Neuralgia

It’s also noteworthy that Neurontin has interactions with a total of 269 other drugs.

Drug and food interactions

metformin food

It is generally advised to avoid consuming alcohol while taking metformin due to potential interactions. Alcohol can increase the risk of lactic acidosis when combined with metformin, especially in patients with diabetes. It may also cause episodes of low blood sugar (hypoglycemia) or high blood sugar (hyperglycemia). Even small amounts of alcohol can significantly lower blood sugar levels, particularly when taken on an empty stomach or after exercise. This happens because alcohol inhibits gluconeogenesis and the body’s response to low blood sugar. Hypoglycemic episodes may persist for several hours after drinking alcohol. Chronic alcohol abuse can also lead to impaired glucose tolerance and high blood sugar levels.

Food can affect the absorption of metformin differently depending on whether it is an immediate-release or extended-release formulation. Taking immediate-release metformin with food decreases its peak concentration and exposure, while extended-release metformin’s exposure increases when taken with food, although the peak concentration remains unchanged. Patients should take metformin with meals and avoid excessive alcohol intake during treatment. Those with poorly controlled blood glucose, hypertriglyceridemia, neuropathy, or pancreatitis should especially avoid alcohol. Patients should be vigilant for symptoms of lactic acidosis such as malaise, muscle pain, breathing difficulties, increased drowsiness, and abdominal discomfort, particularly after starting metformin therapy. Immediate medical attention is necessary if lactic acidosis is suspected, and metformin should be discontinued promptly. Various tests can help diagnose lactic acidosis in diabetic patients showing metabolic acidosis without signs of ketoacidosis.

gabapentin food

It is generally recommended to avoid combining alcohol with CNS-active agents, as alcohol can enhance their effects. This combination may lead to increased central nervous system depression and potentially impair judgment, cognitive abilities, and motor skills.

Patients taking CNS-active agents should be informed about this interaction and advised to limit or abstain from alcohol consumption. Those who are ambulatory should be cautioned against engaging in activities that require full mental alertness and motor coordination until they understand how these agents affect them. Additionally, patients should notify their physician if they experience excessive or prolonged central nervous system effects that interfere with their daily activities.


The interaction between metformin and gabapentin primarily involves potential alterations in the pharmacokinetics of gabapentin. Metformin is known to affect the absorption of certain medications, and gabapentin’s absorption may be influenced when administered concomitantly with metformin. However, there is limited specific information available regarding the clinical significance or the exact mechanism of interaction between metformin and gabapentin.

Further research and clinical studies are warranted to elucidate the nature and impact of this interaction. Patients taking both metformin and gabapentin should be monitored closely for any signs of altered drug efficacy or adverse effects. Healthcare providers should consider individual patient factors, such as renal function and medical history, when managing the concurrent use of metformin and gabapentin to ensure optimal therapeutic outcomes and patient safety.

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The information presented on this website is not intended as specific medical advice and is not a substitute for professional treatment or diagnosis. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


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