diabetes
14 interactions related to diabetes
metformin + alpha-lipoic acid
Alpha-lipoic acid (ALA) can improve insulin sensitivity and modestly lower blood glucose, producing an additive hypoglycemic effect with metformin. Most short-term clinical studies show the effect is mild, but susceptible patients (elderly, undernourished, on beta-blockers) can experience symptomatic lows.
metformin + chromium
Chromium can increase insulin sensitivity and lower fasting blood glucose, producing an additive effect when stacked on top of metformin. The combination can drive blood sugar below the range that the metformin dose was calibrated for, raising the risk of hypoglycemia symptoms (shakiness, sweating, confusion) even though metformin alone rarely causes lows.
glipizide + berberine
Berberine has potent glucose-lowering activity comparable to metformin and also inhibits CYP2C9, the enzyme responsible for clearing glipizide. The pharmacodynamic stacking plus pharmacokinetic interaction can substantially raise glipizide exposure and produce severe, prolonged hypoglycemia.
metformin + cinnamon
Cinnamon (particularly cassia and ceylon varieties) has a mild antiglycemic effect that can produce an additive blood sugar reduction when combined with metformin. The effect is modest in most studies but can become clinically meaningful in patients with already well-controlled A1c or those on combination diabetes regimens.
insulin + chromium
Chromium increases insulin sensitivity at the muscle cell, which means each unit of injected insulin produces a larger glucose-lowering effect than your dose was calibrated for. The result can be unpredictable hypoglycemia, particularly between meals and overnight when basal insulin is acting.
glipizide + bitter melon
Bitter melon (Momordica charantia) has multiple glucose-lowering mechanisms including enhanced peripheral glucose uptake and possible insulinotropic activity. Combined with the sulfonylurea glipizide, the pharmacodynamic synergism can produce significant additive hypoglycemia, particularly postprandially.
glipizide + ginseng
Ginseng (Panax and American) stimulates pancreatic insulin secretion through the same mechanism as glipizide. The combination is pharmacodynamically synergistic and can cause additive hypoglycemia, particularly in fasting or fed states where ginseng has demonstrated postprandial glucose reductions.
psyllium + metformin
Psyllium forms a viscous gel that can physically trap metformin in the gut and slow its absorption, potentially reducing peak plasma levels and blood-glucose control when both are taken simultaneously. Soluble fiber can also independently lower postprandial glucose, which may compound metformin's hypoglycemic effect.
glucomannan + metformin
Glucomannan is a highly viscous soluble fiber that swells dramatically in the gut and can bind metformin, reducing its absorption when both are taken together. Glucomannan also has independent glucose-lowering effects that may compound metformin's action and increase the risk of hypoglycemia.
alcohol + glipizide
Alcohol potentiates the hypoglycemic effect of glipizide by suppressing hepatic gluconeogenesis, and in rare cases can trigger a disulfiram-like reaction with flushing, headache, nausea, and palpitations. Sulfonylurea-induced hypoglycemia tends to be prolonged and recurrent.
smoking + insulin
Smoking reduces subcutaneous insulin absorption through vasoconstriction and worsens insulin resistance through nicotine-driven catecholamine release, oxidative stress, and inflammation, with HbA1c rising progressively with cigarettes per day. Diabetic smokers typically need 15-30% more insulin than non-smokers to achieve the same glycemic control.
vitamin c + glucose meter
Vitamin C (ascorbic acid) is a strong reducing agent that interferes with the electrochemical reactions used by many home and hospital glucose meters, producing falsely elevated blood glucose readings, especially with glucose dehydrogenase (GDH-PQQ) and some glucose oxidase strip chemistries. Cases have been reported where high-dose vitamin C therapy led to a wrong diagnosis of diabetic ketoacidosis and inappropriate insulin treatment.
ginger tea + metformin
Ginger (Zingiber officinale) has modest blood-glucose-lowering activity in randomized trials in type 2 diabetes, primarily improving fasting glucose and HbA1c. Combined with metformin, the effect is generally additive rather than dangerous, but it can occasionally contribute to hypoglycemia, particularly with other glucose-lowering drugs or fasting.
alcohol + insulin
Alcohol suppresses hepatic gluconeogenesis, removing a key safety net against low blood sugar; insulin lowers glucose directly. Combined, they can cause severe, prolonged, and delayed hypoglycemia, especially when drinking on an empty stomach or overnight.