Side Effects
Symptoms associated with using insulin can differ depending on a patient’s health, treatment, and condition.
Most people do not experience side effects with insulin treatment. If you do experience side effects that worsen and persist, contact your doctor immediately, especially if you see signs of low potassium levels in the blood, irregular heartbeats, cramps, and weakness.
Injection site reactions may occur. This can include redness, irritation, and pain at injection sites.
Insulin can cause low blood sugar (hypoglycemia), showing symptoms of cold sweats, shaking, hunger, blurred vision, increased heartbeat, dizziness, or tingling feet/hands.
You are carrying a diabetic candy, glucose tablets, or a sugary drink (non-diet) in case of hypoglycemic side effects. To prevent hypoglycemia from occurring, be sure to eat meals regularly and do not skip meals. Consult your doctor for instruction in the event you miss a meal.
Hyperglycemia is another side effect that also may occur. Symptoms include increased thirst, increased urination, flushing, rapid breathing, drowsiness, confusion, and fruity breath. Speak with your doctor if you experience symptoms, as your dosage may need to be adjusted.
Severe allergic reactions when taking insulin are rare. If you experience itching/swelling, body rash, trouble breathing, or dizziness, seek medical attention immediately.
All Humulin R insulin side effects listed above are not complete. Speak to your doctor or pharmacist about possible side effects.