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Lantus (Insulin Glargine) Side Effects in Pakistan

Lantus side effects — a complete guide. From common effects to serious warnings — everything you need to know is on this page. This is YMYL content — seek medical help immediately for any serious symptom.

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-06-17

Side Effects

Quick Answer

Common side effects of Lantus (Insulin Glargine) include hypoglycaemia (low blood sugar — sweating, shakiness, confusion), injection site reactions, lipodystrophy, and weight gain. Serious effects such as severe hypoglycaemia (unconsciousness/seizure) require immediate emergency treatment with glucagon or IV glucose. Stop use and seek emergency care for signs of severe allergic reaction. Contact your diabetologist if any side effect persists.

Side Effects at a Glance

Common

Hypoglycaemia (low blood sugar) — sweating, shakiness, confusion, hunger, palpitations
Injection site reactions — redness, pain, mild swelling, itching
Lipodystrophy — skin thickening or thinning with repeated same-site injection
Weight gain (common with insulin therapy)

Serious — See a Doctor

Severe hypoglycaemia — loss of consciousness, seizure (EMERGENCY — glucagon or IV glucose needed)
Severe allergic reaction / anaphylaxis — very rare (rash, dyspnoea, angioedema)
Severe hypokalemia (dangerously low potassium)

When to See a Doctor Immediately

Loss of consciousness or seizure — severe hypoglycaemia — EMERGENCY: inject glucagon and call an ambulance
Signs of severe allergic reaction: breathing difficulty, severe rash, swelling of face/throat — EMERGENCY
Repeated unexplained hypoglycaemia — see a diabetologist for dose review
Injection site lumps, hard tissue, or skin dimpling — lipodystrophy
Blood sugar consistently too high or too low despite correct dosing

Lantus (Insulin Glargine) Side Effects (Nuksanat)

Lantus (Insulin Glargine, 100 units/mL) is generally safe when used correctly at the prescribed dose. However, like all insulins, it can cause side effects — the most important being hypoglycaemia.

Common Side Effects (Aam Nuksanat)

Hypoglycaemia (sweating, shakiness, confusion, hunger, palpitations)
Injection site reactions (redness, pain, mild swelling, itching)
Lipodystrophy (skin thickening or thinning with repeated same-site injection)
Weight gain (common with insulin therapy)

These side effects are generally manageable. If they persist or worsen, inform your diabetologist.

Serious Side Effects (Sanjeedah Nuksanat)

Severe hypoglycaemia — loss of consciousness, seizure — EMERGENCY (glucagon + ambulance)
Severe allergic reaction / anaphylaxis — rash, breathing difficulty, swelling — EMERGENCY
Severe hypokalemia — muscle weakness, irregular heartbeat — EMERGENCY

When to See a Doctor (Kab Doctor Se Milna Zaroori Hai)

Unconsciousness or seizure — EMERGENCY: glucagon + ambulance
Severe allergic signs — EMERGENCY
Repeated unexplained hypoglycaemia episodes
Injection site lumps or skin changes
Blood sugar consistently out of target range

Warnings and Precautions (Ihtiyat)

Always keep glucose or sugar on hand
Beta-blockers can mask the physical signs of hypoglycaemia
Alcohol use increases the risk of hypoglycaemia
NEVER mix with another insulin in the same syringe

Side Effects Summary Table

Type	Side Effect	Action
Common	Hypoglycaemia	Take glucose; inform diabetologist
Common	Injection site reactions	Monitor / inform doctor
Common	Lipodystrophy	Rotate sites; see a doctor
Common	Weight gain	Diet/exercise; diabetologist guidance
Serious	Severe hypoglycaemia	EMERGENCY — Glucagon + ambulance
Serious	Anaphylaxis	EMERGENCY — Stop, emergency help
Serious	Severe hypokalemia	EMERGENCY — Go to hospital

Reporting Side Effects

If you notice any unexpected side effect, report it on the DRAP pharmacovigilance portal: https://www.dra.gov.pk/pharmacovigilance

The information in this guide is for educational purposes only. If you notice any side effect, contact your doctor or pharmacist.

Frequently Asked Questions

Lantus ke sabse common side effects kya hain?

The most common side effect is hypoglycaemia (low blood sugar) — symptoms include sweating, shakiness, confusion, and hunger. Redness at the injection site, weight gain, and lipodystrophy are also common. Mild symptoms are generally manageable — inform your diabetologist if they persist.

Kya Lantus allergic reaction cause kar sakta hai?

Yes, but a severe allergic reaction is very rare. Signs include rash, itching, swelling of the face or throat, and breathing difficulty. This is an EMERGENCY — stop the injection immediately and seek medical help.

Kya Lantus lambe arse tak safe hai?

Yes — long-term use is clinically established, but regular diabetologist follow-up, injection site rotation, and blood glucose monitoring are essential. Site rotation is critical to prevent lipodystrophy.

Lantus se weight gain kyun hoti hai?

Insulin is an anabolic hormone — it promotes storage of glucose in cells, which leads to weight gain. Maintain diet and exercise under your diabetologist's guidance.

Hypoglycaemia ho jaye to kya karein?

Mild: immediately take glucose tablets, fruit juice, or 2–3 teaspoons of sugar; recheck after 15 minutes. Severe (unconsciousness/seizure): inject glucagon and call an ambulance — this is an EMERGENCY. Do not try to feed the patient if they are unconscious.

Brand alternatives, same-class options, and other medicines used for the same conditions as Lantus (Insulin Glargine Injection).

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Sources

DRAP Registered Products Database — Drug Regulatory Authority of Pakistan
WHO Model List of Essential Medicines, 23rd ed. (2023) — World Health Organization
British National Formulary (BNF) — BMJ Group & Pharmaceutical Press

Medical disclaimer

This page is for educational use only and does not replace professional medical advice. Always confirm diagnosis, dose, and interactions with a qualified doctor or pharmacist before starting or changing any medicine.