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insulin

Insulin · Antidiabetic agent

InsulinAntidiabetic agent
CDSCO approved
EXCRETION
not curated
INTERACTIONS
6 major
incl. contraindicated
PREGNANCY
not curated
Top interactionssee all 12
  • AminophyllineContraindicatedTextbookKDT 7e · p227
  • GlitazonesSevereTextbookKDT 7e · p277
  • EmpagliflozinSevereDatabaseKimi deep-research + Cla
  • GlipizideSevereDatabaseKimi deep-research + Cla

Mechanism

Insulin is a hormone that regulates glucose homeostasis. It lowers blood glucose by inhibiting hepatic glucose production and stimulating the uptake and metabolism of glucose by liver, muscle, and adipose cells. Insulin also has potent effects to reduce lipolysis, increase lipid storage, stimulate amino acid uptake and protein synthesis, and inhibit protein degradation.

Indications

Type 1 diabetesType 2 diabetesAcute correction of hyperglycemiaDiabetic ketoacidosis (intravenous infusion)Hyperglycemia in hospitalized setting (intravenous infusion)

Side effects

Common
Weight gainHypoglycemia
Serious
  • Allergic reactions
  • Lipoatrophy
  • Lipohypertrophy

Drug interactions

Aminophylline
Contraindicated
Textbook

Should not be mixed in the same infusion bottle/syringe.

Do not mix.

Source: KDT 7e · p227

Glitazones
Severe
Textbook

Greater fluid retention, weight gain, and precipitation of congestive heart failure.

Experts advise avoiding this combination.

Source: KDT 7e · p277

Empagliflozin
Severe
Database

Additive hypoglycaemia

Reduce insulin/sulfonylurea dose; monitor glucose

Source: Kimi deep-research + Cla

Glipizide
Severe
Database

Additive hypoglycaemia

Monitor glucose; adjust doses

Source: Kimi deep-research + Cla

Nateglinide
Severe
Database

Additive hypoglycaemia

Adjust doses; monitor glucose

Source: Kimi deep-research + Cla

Octreotide
Severe
Database

Altered glucose counter-regulation → hypo- or hyperglycaemia

Monitor glucose closely; adjust antidiabetic dose

Source: Kimi deep-research + Cla

Alpha Glucosidase Inhibitors
Moderate
Textbook

Increased risk of hypoglycemia when added to insulin.

Source: G&G 14e · p1039

Bendroflumethiazide
Moderate
Textbook

Reduced effectiveness of insulin, potentially leading to hyperglycemia.

Not explicitly stated, but implies monitoring blood glucose levels.

Source: G&G 14e · p567

Chlorthalidone
Moderate
Textbook

Reduced effectiveness of insulin, potentially leading to hyperglycemia.

Not explicitly stated, but implies monitoring blood glucose levels.

Source: G&G 14e · p567

Enalapril
Moderate
Textbook

Increased hypoglycemic risk.

Closely monitor blood glucose levels and adjust antidiabetic medication as needed.

Source: G&G 14e · p653

General Anaesthesia
Moderate
Textbook

Increased insulin requirement.

Switch a diabetic patient to plain insulin and adjust the dose during general anaesthesia, even if they are on oral hypoglycaemics.

Source: KDT 7e · p385

Hydrochlorothiazide
Moderate
Textbook

Reduced effectiveness of insulin, potentially leading to hyperglycemia.

Not explicitly stated, but implies monitoring blood glucose levels.

Source: G&G 14e · p567

Related guidelines

Other Insulin drugs

Ask House about insulin

Continue into a citation-backed clinical answer with the drug context already attached.

Sources: KD Tripathi 7e, Goodman & Gilman 14e·Verified: 2026-05-13 · House clinical team