Prescription requiredAntidiabetic

Sustaglar Pen — Side Effects & Warnings

Known side effects of Sustaglar Pen include Hypoglycaemia (low blood sugar), injection site reactions (pain/redness/swelling), weight gain, itching or rash, lipodystrophy at injection site. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated August 2026

Common Side Effects

Hypoglycaemia (low blood sugar)
injection site reactions (pain/redness/swelling)
weight gain
itching or rash
lipodystrophy at injection site

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Risk of hypoglycaemia—carry glucose/sugar and know symptoms (sweating, tremor, confusion). Do not share pen to avoid infection transmission. Use caution in kidney/liver impairment and during illness; dose adjustments may be needed. Do not stop or change dose without medical advice. Seek urgent care for severe allergy (swelling, breathing difficulty) or repeated severe low sugars.

Drug Interactions

Sustaglar Pen may interact with the following:

Other antidiabetics
beta-blockers (may mask hypoglycaemia)
corticosteroids
thiazide diuretics
thyroid hormones
sympathomimetics
MAO inhibitors
ACE inhibitors
alcohol (can increase hypoglycaemia risk)

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Consult doctor

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store unopened pen in refrigerator (2–8°C); do not freeze. Protect from light. After first use, store as per label (often at room temperature below 25–30°C) and discard after the in-use period; keep cap on when not in use.

Sustaglar Pen — Safety Summary

Prescription: Required (Rx)
Pregnancy: Consult doctor
Alcohol: Use with caution
Habit forming: No

Sustaglar Pen — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

Get help from a doctor

Consult a doctor

Discuss side effects with a qualified doctor online.

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Full product details for Sustaglar Pen.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.

Sustaglar Pen — Side Effects & Warnings

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated August 2026