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Patient Education Monograph

Insulin Regular Human Injection

Common brand names:

Humulin R, Novolin GE Toronto

Pronounced

"IN-sue-lin"

Drug Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Beta-blocker medications (such as metoprolol, propranolol, glaucoma eye drops such as timolol) may prevent the fast/pounding heartbeat you would usually feel when your blood sugar falls too low (hypoglycemia). Other symptoms of low blood sugar, such as dizziness, hunger, or sweating, are unaffected by these drugs.

Many drugs can affect your blood sugar levels, making it more difficult to control your blood sugar. Before you start, stop, or change any medication, talk with your doctor or pharmacist about how the medication may affect your blood sugar. Check your blood sugar regularly as directed by your doctor. Tell your doctor about the results and of any symptoms of high or low blood sugar. (See also Side Effects section.) Your doctor may need to adjust your diabetes medication, exercise program, or diet.

Supportive Interactions
2
- Insulin
  DHEA
  Replenish Depleted Nutrients
  Insulin has been shown to decrease the levels of DHEA and DHEA-sulfate in the blood. More research is needed to determine the significance of this finding.
  DHEA
  Insulin
  ×
  1. Lavallee B, Provost PR, Kahwash Z, et al. Effect of insulin on serum levels of dehydroepiandrosterone metabolites in men. Clin Endocrinol 1997;46:93-100.
- Insulin
  Fenugreek
  Support Medicine
  In a controlled study of patients with type 1 diabetes, fenugreek (100 grams per day for ten days) was reported to reduce blood sugar, urinary sugar excretion, serum cholesterol, and triglycerides, with no change in insulin levels. In a controlled study of people with type 2 diabetes, fenugreek (25 grams per day for 24 weeks) was reported to significantly reduce blood glucose levels. People using insulin should talk with their prescribing doctor before incorporating large amounts of fenugreek into their diet.
  Fenugreek
  Insulin
  ×
  1. Sharma RD, Raghuram TC, Rao NS. Effect of fenugreek seeds on blood glucose and serum lipids in type I diabetes. Eur J Clin Nutr 1990;44:301-6.
  2. Sharma RD, Sakar A, Hazra DK, et al. Use of fenugreek seed powder in the management of non-insulin dependent diabetes mellitus. Nutr Res 1996;16:1131-9.
Explanation Required
4
- Insulin
  Biotin
  Needs Explanation
  Biotin supplements have been shown to improve blood sugar control in people with diabetes. Consequently, supplementing with biotin could reduce blood sugar levels in people with taking insulin, potentially resulting in abnormally low blood sugar levels (hypoglycemia). While biotin supplementation may be beneficial for people with diabetes, its use in combination with insulin or with any other blood sugar–lowering medication should be supervised by a doctor.
  Biotin
  Insulin
  ×
  1. Maebashi M, Makino Y, Furukawa Y, et al. Therapeutic evaluation of the effect of biotin on hyperglycemia in patients with non-insulin dependent diabetes mellitus. J Clin Biochem Nutr 1993;14:211–8
- Insulin
  Chromium
  Needs Explanation
  Chromium supplements have been shown to improve blood sugar control in people with diabetes. Consequently, supplementing with chromium could reduce blood sugar levels in people with taking insulin, potentially resulting in abnormally low blood sugar levels (hypoglycemia). While chromium supplementation may be beneficial for people with diabetes, its use in combination with insulin or with any other blood sugar-lowering medication should be supervised by a doctor.
  Chromium
  Insulin
  ×
  1. Anderson RA, Cheng N, Bryden NA, Polansky MM, Cheng N, Chi J, et al. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes. Diabetes1997;46:1786-91.
- Insulin
  Dandelion
  Needs Explanation
  Animal studies have shown that dandelion can lower blood sugar levels. In a case report, a patient who was taking insulin for diabetes developed episodes of hypoglycemia after adding dandelion to her treatment regimen. People taking blood sugar-lowering drugs should therefore not take dandelion without the supervision of a doctor.
  Dandelion
  Insulin
  ×
  1. Goksu E, Eken C, Karadeniz O, Kucukyilmaz O. First report of hypoglycemia secondary to dandelion (Taraxacum officinale) ingestion. Am J Emerg Med 2010;28:111.e1-2.
- Insulin
  Gymnema
  Needs Explanation
  Although no interactions have been reported, gymnema may decrease the required daily dose of insulin. Therefore, people currently using insulin for the treatment of diabetes should discuss the use of this herb with their healthcare professional.
  Gymnema
  Insulin
  ×
  1. Shanmugasundaram ER, Rajeswari G, Baskaran K, et al. Use of Gymnema sylvestre leaf extract in the control of blood glucose in insulin-dependent diabetes mellitus. J Ethnopharmacol 1990;30:281-94.