Humulin R U-500

  • Diabetes

Humulin R U-500 Generic Name & Formulations

General Description

Regular insulin (human, rDNA origin) 500 Units/mL; inj; contains m-cresol.

How Supplied

Vials 70/30, N, R (U-100)—3mL, 10mL; R (U-500)—20mL; KwikPen (70/30, N)—5x3mL; R (U-500)—2x3mL


Humulin R U-500 Indications



Humulin R U-500 Dosage and Administration

Adults and Children

Individualize. SC inj only. Rotate inj sites. Onset ~30mins, peak 4–8hrs, duration up to 24hrs. Should prescribe U-500 insulin syringes for use with Humulin R U-500 vials.

Humulin R U-500 Contraindications


During episodes of hypoglycemia.

Humulin R U-500 Boxed Warnings

Not Applicable

Humulin R U-500 Warnings/Precautions


Instruct patients on proper administration of insulin, check insulin label before each injection, and management of hypoglycemia. Do not reuse or share pens, needles, or syringes between patients, even if the needle is changed. Do not inject into areas of lipodystrophy or localized cutaneous amyloidosis. Increased risk of hyperglycemia or hypoglycemia if changes in physical activity, meal patterns, concomitant medications, renal or hepatic function, insulin regimen, administration site, and if acute illness occurs: monitor glucose more frequently and may need to adjust dose. Monitor potassium levels in patients at risk for hypokalemia (eg, concomitant K+-lowering or K+-sensitive drugs). Discontinue if hypersensitivity reactions occur. Renal or hepatic impairment. Elderly. Pregnancy. Nursing mothers.

Humulin R U-500 Pharmacokinetics

See Literature

Humulin R U-500 Interactions


Concomitant thiazolidinediones (TZDs) may cause fluid retention and heart failure; consider dose reduction or discontinue TZDs. Increased risk of hypoglycemia with concomitant antidiabetics, ACEIs, ARBs, disopyramide, fibrates, fluoxetine, MAOIs, pentoxifylline, pramlintide, propoxyphene, salicylates, somatostatin analogs (eg, octreotide), sulfonamide antibiotics. Reduced efficacy with concomitant atypical antipsychotics (eg, olanzapine, clozapine), steroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, protease inhibitors, somatropin, sympathomimetics (eg, albuterol, epinephrine, terbutaline), thyroid hormones. Variable effects with β-blockers, clonidine, lithium salts, alcohol, pentamidine. Concomitant β-blockers, clonidine, guanethidine, reserpine may blunt hypoglycemia. Onset may be delayed if regular insulin is mixed with zinc insulin. Regular and NPH insulins may be mixed and used immediately or stored for future use.

Humulin R U-500 Adverse Reactions

Adverse Reactions

Hypoglycemia, allergic reactions, inj site reactions, lipodystrophy, pruritus, rash, weight gain, edema, hypokalemia.

Humulin R U-500 Clinical Trials

See Literature

Humulin R U-500 Note

Not Applicable

Humulin R U-500 Patient Counseling

See Literature