Headon Injection (HGH), containing Somatropin 4 IU (recombinant human growth hormone, HGH), is a prescription medication by Sun Pharmaceutical Industries Ltd. Available as a powder for injection (4 IU/vial), it treats growth hormone deficiency (GHD) and related conditions in children and adults. Requires a prescription due to risks of serious side effects, including diabetes and cancer risk.
Uses
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Treats growth failure in children due to GHD, Turner syndrome, Prader-Willi syndrome, chronic kidney disease, or idiopathic short stature 
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Manages short stature in adults with GHD (childhood- or adult-onset) 
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Treats muscle wasting in HIV/AIDS or short bowel syndrome 
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Off-label: May be used for anti-aging or performance enhancement (not FDA-approved, illegal without prescription) 
Side Effects
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Common: Injection site reactions (pain, swelling, redness), headache, rash, joint/muscle pain 
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Rare: Hypothyroidism, fluid retention, scoliosis progression, ear infections (Turner syndrome) 
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Serious: Intracranial hypertension (severe headache, vision changes), diabetic ketoacidosis, pancreatitis, increased cancer risk, allergic reactions (e.g., hives, swelling) 
Seek emergency help for severe headache, vision loss, or allergic reactions. Consult a doctor for persistent side effects.
How to Use
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Dosage: Children: 25–50 μg/kg/day; adults: 0.1–0.3 mg/day, adjusted by doctor based on IGF-1 levels, weight, and condition. Administered 6–7 days/week. 
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Administration: Reconstitute powder with provided diluent. Inject subcutaneously (under skin) into fatty tissue (e.g., thigh, abdomen) at bedtime. Rotate injection sites. Administered by a healthcare professional or self-administered after training. 
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Missed Dose: Skip if >12 hours until next dose; do not double dose. Contact doctor if multiple doses missed. 
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Overdose: Seek urgent help for symptoms like hypoglycemia (sweating, shakiness) or hyperglycemia. Call Poison Help (1-800-222-1222). 
How Injection Works
Somatropin, a recombinant HGH, mimics natural growth hormone produced by the pituitary gland. It stimulates insulin-like growth factor-1 (IGF-1) production in the liver, promoting bone, muscle, and tissue growth. It enhances cell reproduction, metabolism, and protein synthesis, addressing GHD symptoms. Effects on height may take 3–6 months; muscle benefits vary by condition.
Safety Advice
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Allergies: Avoid if allergic to Somatropin or excipients (e.g., benzyl alcohol in diluent). 
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Health Conditions: Contraindicated in active cancer, acute critical illness, severe obesity with Prader-Willi syndrome, or closed epiphyses in children. Caution in diabetes, hypothyroidism, or scoliosis. 
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Pregnancy/Breastfeeding: Not recommended in pregnancy (fetal risk); safe in breastfeeding with limited risk. Consult doctor. 
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Driving: Safe unless dizziness or vision changes occur. 
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Alcohol: Unsafe; may worsen side effects or alter blood sugar control. 
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Storage: Store unopened vials at 2–8°C (refrigerator); do not freeze. Use reconstituted solution within 14 days if refrigerated. 




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