Insulin — Uses, Dosage, Side Effects & Safety

Drug class: Antidiabetic agent (Hormone)

Overview

Insulin is a hormone that helps your body use glucose (sugar) for energy. People with diabetes may not produce enough insulin or may not use it effectively, leading to high blood sugar levels. Insulin therapy is used to control blood sugar in people with type 1 diabetes, and sometimes in type 2 diabetes or gestational diabetes when other treatments are not enough. Insulin works by helping glucose move from your blood into your cells, where it can be used for energy. There are different types of insulin that act at different speeds, including rapid-acting, short-acting, intermediate-acting, and long-acting forms. Key points: Insulin must be injected or inhaled (not taken by mouth). It is important to use insulin exactly as prescribed, monitor your blood sugar regularly, and be aware of signs of low blood sugar (hypoglycemia).

Therapeutic uses

• Type 1 diabetes mellitus
• Type 2 diabetes mellitus
• Gestational diabetes
• Diabetic ketoacidosis
• Hyperkalemia

Common side effects

• Hypoglycemia
• Weight gain
• Injection site reactions
• Lipodystrophy
• Allergic reactions
• Peripheral edema

Frequently Asked Questions about Insulin

What is insulin used for?

Insulin is used to control blood sugar in people with diabetes, including type 1 diabetes, type 2 diabetes (when other treatments are not enough), and gestational diabetes.

How do I know if my insulin is working?

You should monitor your blood sugar levels regularly. If your blood sugar stays within your target range, your insulin is working as intended. Symptoms of high or low blood sugar may indicate a need for dose adjustment.

What should I do if I experience low blood sugar?

If you feel symptoms of low blood sugar (shakiness, sweating, confusion), eat or drink a fast-acting source of sugar (such as glucose tablets, juice, or candy) and recheck your blood sugar. Seek medical help if symptoms are severe or do not improve.

Can insulin be taken orally?

No, insulin cannot be taken by mouth because it is broken down in the digestive system. It must be injected or inhaled.

How should I store my insulin?

Unopened insulin should be stored in the refrigerator. Once opened, it can be kept at room temperature (below 30°C/86°F) for up to 28 days, but always check the product instructions.

What are the signs of an insulin allergy?

Signs include rash, itching, swelling at the injection site, or more severe reactions like difficulty breathing or swelling of the face, lips, or throat. Seek medical attention if you suspect an allergy.

Can I use insulin if I am pregnant or breastfeeding?

Insulin is generally considered safe during pregnancy and breastfeeding, but your dose may need adjustment. Always consult your healthcare provider.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.