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Humulin R Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Humulin R (insulin (human recombinant)) is used to treat diabetes. Insulin is a hormone that is produced in the body. Common side effects include injection site reactions (e.g., pain, redness, irritation).
Each patient's diabetes is different, and the injection schedule and use of Humulin R is individualized. A doctor determines which insulin to use, how much, and when and how often to inject it. Humulin R may interact with albuterol, clonidine, reserpine, guanethidine, or beta-blockers. Tell your doctor all medications you are taking. Tell your doctor if you are pregnant before using Humulin R. If you are planning pregnancy, discuss a plan for managing your blood sugars with your doctor before you become pregnant. Your doctor may switch the type of insulin you use during pregnancy. This medication does not pass into breast milk. Consult your doctor before breast-feeding. Insulin needs may change while breast-feeding.
Our Humulin R (insulin (human recombinant)) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
Humulin R in Detail - Patient Information: Side Effects
Get emergency medical help if you have any of these signs of insulin allergy: itching skin rash over the entire body, wheezing, trouble breathing, fast heart rate, sweating, or feeling like you might pass out.
Hypoglycemia, or low blood sugar, is the most common side effect of insulin. Symptoms include headache, hunger, weakness, sweating, tremors, irritability, trouble concentrating, rapid breathing, fast heartbeat, fainting, or seizure (severe hypoglycemia can be fatal). Carry hard candy or glucose tablets with you in case you have low blood sugar.
Tell your doctor if you have itching, swelling, redness, or thickening of the skin where you inject insulin.
Read the entire detailed patient monograph for Humulin R (Insulin (Human Recombinant))
What is Patient Information Overview?
A concise overview of the drug for the patient or caregiver from First DataBank.
Humulin R Overview - Patient Information: Side Effects
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: signs of low potassium level in the blood (such as muscle cramps, weakness, irregular heartbeat).
This medication can cause low blood sugar (hypoglycemia). This may occur if you do not consume enough calories from food or if you do unusually heavy exercise. Symptoms of low blood sugar include sudden sweating, shaking, fast heartbeat, hunger, blurred vision, dizziness, or tingling hands/feet. It is a good habit to carry glucose tablets or gel to treat low blood sugar. If you don't have these reliable forms of glucose, rapidly raise your blood sugar by eating a quick source of sugar such as table sugar, honey, or candy, or drink fruit juice or non-diet soda. Tell your doctor immediately about the reaction and the use of this product. To help prevent low blood sugar, eat meals on a regular schedule, and do not skip meals. Check with your doctor or pharmacist to find out what you should do if you miss a meal.
Symptoms of high blood sugar (hyperglycemia) include thirst, increased urination, confusion, drowsiness, flushing, rapid breathing, and fruity breath odor. If these symptoms occur, tell your doctor immediately. Your dosage may need to be increased.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the entire patient information overview for Humulin R (Insulin (Human Recombinant))
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Humulin R FDA Prescribing Information: Side Effects
Hypoglycemia is one of the most frequent adverse events experienced by insulin users.
Symptoms of mild to moderate hypoglycemia may occur suddenly and can include:
Signs of severe hypoglycemia can include:
Early warning symptoms of hypoglycemia may be different or less pronounced under certain conditions, such as long duration of diabetes, autonomic diabetic neuropathy, use of medications such as beta-adrenergic blockers, changing insulin preparations, or intensified control (3 or more insulin injections per day) of diabetes.
Without recognition of early warning symptoms, the patient may not be able to take steps to avoid more serious hypoglycemia. Patients who experience hypoglycemia without early warning symptoms should monitor their blood glucose more frequently, especially prior to activities such as driving. Mild to moderate hypoglycemia may be treated by eating foods or taking drinks that contain sugar. Patients should always carry a quick source of sugar, such as hard candy, non-diet carbohydrate-containing drinks or glucose tablets.
Administration of insulin subcutaneously can result in lipoatrophy (depression in the skin) or lipohypertrophy (enlargement or thickening of tissue).
Local Allergy - Patients occasionally experience erythema, local edema, and pruritus at the site of injection. This condition usually is self-limiting. In some instances, this condition may be related to factors other than insulin, such as irritants in the skin cleansing agent or poor injection technique.
Systemic Allergy - Less common, but potentially more serious, is generalized allergy to insulin, which may cause rash over the whole body, shortness of breath, wheezing, reduction in blood pressure, fast pulse, or sweating. Severe cases of generalized allergy (anaphylaxis) may be life threatening.
Weight gain can occur with some insulin therapies and has been attributed to the anabolic effects of insulin and the decrease in glycosuria.
Insulin may cause sodium retention and edema, particularly if previously poor metabolic control is improved by intensified insulin therapy.
Read the entire FDA prescribing information for Humulin R (Insulin (Human Recombinant))
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