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Abbott India Limited - Sachet - 6 G
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Human insulin (100IU)
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Actrapid Flexpen is used for diabetes.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Actrapid Flexpen contains Human insulin (100IU). It belongs to the Insulin class of medicines.
Diabetes
Actrapid 100IU Flexpen (3ml Each) is a short-acting insulin, which starts working within 30 minutes after injection. It works similar to the insulin produced by the body. Insulin facilitates reuptake of sugar in muscle and fat cells and also suppresses the production of sugar in the liver.
Your doctor or nurse will guide you how to use this medicine.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you forget to take Actrapid 100IU Flexpen (3ml Each), your blood sugar may get too high (hyperglycemia). Take it as soon as you remember. If it's time for your next dose then skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to compensate for the missed one.
An overdose of this medicine can cause severe low blood sugar, leading to fits or unconsciousness — this is a medical emergency. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Actrapid Flexpen are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Pregnancy SAFE IF PRESCRIBED |
|---|---|
| Breastfeeding | Breast feeding SAFE IF PRESCRIBED |
| Alcohol | Alcohol CAUTION |
| Driving | Driving UNSAFE |
| Kidney | Kidney CAUTION |
| Liver | Liver CAUTION |
| Habit forming | No |
If you feel shaky, sweaty, confused or unusually hungry, take sugar, glucose or a sweet drink at once and tell your doctor — these are signs your blood sugar has fallen too low. Never change your insulin brand, strength or type on your own — always through your doctor. Rotate the injection site each time, or fatty lumps will form and the insulin will be absorbed unpredictably. Do not use insulin that has changed colour, gone cloudy when it should be clear, or has clumps in it. Never share a pen or needle, even with a family member.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not to be used during an episode of low blood sugar.
Beta blockers can mask the warning signs of low blood sugar. Steroids raise blood sugar and your insulin dose may need review.
Keep unopened insulin in the refrigerator between 2°C and 8°C — never in the freezer, and never against the ice box. The pen or vial in use may be kept below 30°C, away from direct sunlight, for the period stated on the pack. Keep out of the reach of children.
Take it 20 to 30 minutes before a meal. Hypoglycemia (low blood sugar level) is a common side-effect. Learn how to identify and manage its symptoms (sweating, rapid heartbeat, weakness, blurry vision, headache) and teach your family as well. Injection below the skin of the abdomen results in faster absorption than other injection sites. Injection sites must be rotated to prevent hard lumps from developing at one site. Opened vials/cartridges are good at room temperature for up to 4 weeks, while unopened vials must be placed in the refrigerator (2°C–8°C).

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The information on Actrapid Flexpen is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.