Increlex, illustration of pre-filled syringe form (not a photo of the actual pack)

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Increlex

Mecasermin

Prescription required

$1250.00

10mg/ml · 1 syringes

BrandBranded medicine· By Ipsen

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About Increlex

Overview

Increlex is a prescription medicine containing mecasermin, a manufactured version of human insulin-like growth factor-1 (IGF-1). It treats growth failure in children aged 2 years and older with severe primary IGF-1 deficiency, or with a growth hormone gene deletion who have developed antibodies that block growth hormone’s activity. It works by activating IGF-1 receptors in body tissues to stimulate growth. Increlex is not a substitute for growth hormone for its approved uses.

What it treats

- Growth failure in children aged 2 years and older with severe primary insulin-like growth factor-1 (IGF-1) deficiency. - Growth failure in children aged 2 years and older with a growth hormone (GH) gene deletion who have developed antibodies that neutralize GH. Increlex is not a substitute for growth hormone for its approved uses.

Safety information

Side effects

Common side effects of Increlex include low blood sugar, allergic reactions at the injection site or affecting the whole body, and enlarged tonsils. Serious side effects include: • Severe low blood sugar, which can cause seizures. • Severe allergic reactions, including anaphylaxis, which may require hospital treatment. If an allergic reaction affects the whole body, stop treatment and seek prompt medical attention. • Increased pressure inside the skull. Eye examinations are recommended before treatment and periodically during treatment. • Enlarged tonsils or adenoids and related complications, which require periodic examinations. • Slipping of the growth plate at the top of the thigh bone and bone tissue death. Contact a doctor if a child develops a limp or hip or knee pain. • Worsening of an existing sideways curve of the spine (scoliosis), which requires monitoring. • Cancer, which has been reported in children treated with Increlex. If evidence of cancer develops, treatment should be stopped and specialist medical care sought. Increlex contains the preservative benzyl alcohol, which has been associated with serious reactions, including death, in newborns and infants. Use in infants is not recommended.

When to call your doctor

- A seizure or severe low blood sugar. - A serious allergic reaction. - A new limp or new hip or knee pain.

If symptoms are severe or getting worse quickly, seek emergency care rather than waiting.

Before taking this medicine

Do not use Increlex if you have a known allergy to mecasermin, closed growth plates (epiphyses), or cancer. Increlex can cause severe low blood sugar, including seizures. It should be given shortly before or after a meal or snack. Serious allergic reactions, including anaphylaxis requiring hospital care, have been reported. Stop treatment and seek prompt medical attention if a whole-body allergic reaction occurs. Other conditions requiring caution and monitoring include: - Increased pressure inside the skull: an examination of the back of the eye is recommended before treatment starts and periodically during treatment. - Enlarged tonsils or adenoids: periodic examinations are needed to check for complications. - A new limp or hip or knee pain in a child: this needs evaluation for a slipped hip growth plate and bone tissue death. - Scoliosis: children with an existing spinal curve should be monitored for worsening. - Cancer developing during treatment: treatment must be stopped and specialist medical care sought. Increlex contains benzyl alcohol, which has been associated with serious reactions, including death, in newborns and infants. Use in infants is not recommended. Safety and effectiveness have not been established in children younger than 2 years.

Using Increlex

Dosing

Dosing is set by your prescriber. Each health care professional may prescribe medication differently according to a patient's medical history and condition, so follow the directions on your prescription label and speak to your doctor or pharmacist before changing anything.

Storage

Store in the original carton to protect it from light. Check the pack for whether it must be refrigerated before first use. Keep all medicines out of the sight and reach of children.

Clinical information on this page is summarised from the US FDA label INCRELEX (MECASERMIN) INJECTION [ETON PHARMACEUTICALS, INC.] (DailyMed, retrieved 19 September 2026).

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