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What are the side effects of insulin injection (regular or fast-acting)?

Insulin injection (regular or fast-acting) may cause allergic reactions, with symptoms that include: itching, a rash or hives and problems breathing. Side effects, such as swelling and redness at the injection site, skin changes and weight gain, can also occur. Since all insulin types work by reducing the blood sugar level, one side effect is hypoglycemia (low blood sugar) if an amount in excess of the needs is administered. Symptoms of hypoglycemia include: sweating, dizziness, headaches, hunger, loss of coordination, mood swings, weakness, seizures and loss of consciousness. Hyperglycemia (high blood sugar) could also occur if insufficient insulin is administered. Symptoms of hyperglycemia include: severe hunger or thirst, vision problems and weakness.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.