Somazon

Quick links to important sections

Somazon

Treatment option:

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Somazon

What is Somazon? Defining Mecasermin and its Active Ingredient

Property Description
Active Ingredient Mecasermin (Recombinant human IGF-1)
Form Solution for subcutaneous injection
Pharmacological Class Somatotropin agonist / Insulin-like Growth Factor
General Purpose Replacement therapy for growth factors
Origin Biosynthetic (Recombinant DNA engineered)

Somazon is the name associated with the drug Mecasermin, a highly specialized biologic medicine used as replacement therapy. The active ingredient, Mecasermin, is defined as recombinant human insulin-like growth factor-1 (rhIGF-1), a non-glycosylated protein manufactured through recombinant DNA technology. This process results in a molecule whose structure is identical to the naturally occurring human protein, Insulin-like Growth Factor-1 (IGF-1). Mecasermin is provided as a clear, colorless solution for injection for administration via the subcutaneous route.


Mecasermin's Pharmacological Class and General Purpose

Mecasermin is categorized within the high-level class of Somatotropin agonists (Insulin-like Growth Factor class) because its primary role is to mediate statural growth. Mecasermin has been designated as an Orphan Drug, confirming its specialized therapeutic scope for rare conditions. Functionally, Mecasermin acts as the downstream effector protein, providing the direct stimulus for growth, which is distinct from Growth Hormone (GH) that acts upstream to regulate IGF-1 synthesis. The general therapeutic purpose is to supply this critical protein to support cell division and the growth of cartilage in the growth plates, thereby promoting statural growth and development.


Composition Essentials: What Makes the Somazon Solution

The final drug product is an aqueous solution containing the active Mecasermin protein, supplied in a multi-dose glass vial intended for subcutaneous use. This specific preparation is required because the polypeptide structure necessitates this route of administration for systemic delivery and efficacy. To ensure the product's stability and sterility, the formulation includes excipients such as sodium chloride for appropriate tonicity and a preservative, typically benzyl alcohol, a factor relevant to its identity and use restrictions.

What side effects are possible with Somazon?

Possible Side Effects and Safety Information for Somazon

The safety profile of Mecasermin (Somazon) is defined by its action as a growth factor, primarily affecting metabolism and the growth of tissues. Information on adverse reactions is categorized based on frequency and body systems, as documented by regulatory agencies like the EMA and FDA.


Adverse Reactions and Frequency

The most significant and Very Common side effect, occurring in more than 1 in 10 patients, is Hypoglycemia (low blood sugar), which is an expected result of the drug's insulin-like activity. Common side effects, occurring in up to 1 in 10 patients, include Tonsillar Hypertrophy (enlargement of the tonsils), various Injection Site Reactions (e.g., pain, bruising, lipohypertrophy), Otitis Media (middle ear infection), and Intracranial Hypertension (increased pressure in the skull).


Serious Safety Considerations and Regulatory Limits

Serious Adverse Reactions officially noted in labeling include severe forms of Hypoglycemia that may lead to seizures, Intracranial Hypertension (which requires regular funduscopic monitoring), and Slipped Capital Femoral Epiphysis (SCFE) in growing individuals. The drug is Contraindicated for use in individuals with active or suspected malignant neoplasia (cancer) due to the risk of tumor growth or progression. It is also Contraindicated in patients whose growth plates (epiphyses) have closed and is generally not recommended for infants due to the presence of benzyl alcohol.


Time-Related Safety Patterns

Official documents indicate that the risk of Hypoglycemia is highest at the beginning of treatment and during dose escalation. Similarly, Tonsillar Hypertrophy is typically noted early in treatment.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Mecasermin (Somazon) overdose is primarily defined by the drug’s potent metabolic activity.

Overdose Entity Map (High-Level) Officially Documented Information
Documented Overdose Manifestations The main acute manifestation of overdosage is severe hypoglycemia (low blood sugar), which may be accompanied by symptoms like dizziness, sweating, headache, and confusion
Serious / Life-Threatening Outcomes Severe, unmanaged hypoglycemia may escalate to seizures or coma. The regulatory information also notes the potential for systemic allergic reactions (anaphylaxis) in an acute setting.
Dose-related or Exposure-related Factors Chronic overdosage is associated with the potential development of clinical signs resembling acromegaly due to sustained high exposure.

Official Emergency Actions and Requirements

  • Immediate medical attention must be sought for any instance of severe hypoglycemia, loss of consciousness, or signs of a systemic allergic reaction or anaphylaxis.
  • Emergency management is strictly symptomatic and supportive, commonly requiring the administration of intravenous glucose to correct profound hypoglycemia.
  • No specific chemical antidote is listed in the official prescribing information for Mecasermin overdosage.

Population-Specific Overdose Notes

Official labeling advises that special attention should be paid to young children due to their inconsistent oral food intake, which can increase the risk of severe hypoglycemia. Furthermore, the presence of benzyl alcohol as a preservative is noted for consideration in the emergency setting, especially concerning very young infants.

The regulatory profile thus establishes that the essential risk is the acute metabolic effect of overdosage, demanding prompt medical attention under circumstances of severe, life-threatening symptoms.

Therapeutic Uses of Somazon

Somazon is a prescription medication that is considered relevant across domains where additional symptomatic support is needed. The therapeutic category to which Somazon belongs is commonly used to help with conditions presenting with acute or disruptive episodes. The medicine may assist with managing symptoms related to heightened physiological activity and symptoms related to systemic imbalance, which may be part of symptomatic management for a range of conditions.

The therapeutic uses often include assistance with anxiety and panic disorders, management of certain seizure disorders, and addressing acute muscle spasms. The drug is also applied in scenarios requiring short-term symptomatic assistance with insomnia and during the management of acute alcohol withdrawal. The medication is relevant for easing symptoms of increased neurological or muscular activity and contributes to easing the overall symptom load.

“It supports patients during episodes of heightened discomfort by easing distress.”

The drug may help patients cope more steadily with symptom fluctuations when symptoms become more noticeable, contributing to improved comfort during these periods of heightened discomfort.

Quick Fact: Applied in addressing Symptoms Related to Heightened Physiological Activity

Regulatory References

  1. NIH Clinical Overview of Benzodiazepines

Eligibility and Restrictions for Use

Who Can and Cannot Use Somazon (Mecasermin)?

The eligibility to use Somazon is strictly limited to specific populations with a confirmed diagnosis of severe growth factor deficiency, based on official regulatory labeling.

Eligibility and Indications

The medicine is approved for pediatric patients 2 years of age and older and adolescents with open epiphyses. Use is specifically indicated for Severe Primary IGF-1 Deficiency (SPIGFD) or for growth failure due to GH gene deletion with neutralizing antibodies to Growth Hormone (GH). Somazon is not indicated for secondary forms of IGF-1 deficiency (e.g., malnutrition, hypothyroidism), which must be corrected prior to use.

Absolute Contraindications

Somazon is absolutely forbidden for patients with the following conditions:

  • Active or Suspected Neoplasia (Cancer)
  • Closed Epiphyses (fused growth plates)
  • Known Hypersensitivity to mecasermin or its excipients
  • Premature Babies and Neonates (due to the Benzyl Alcohol content)

Restricted or Conditional Use

Use is not established in children less than 2 years of age or in the geriatric population (over 65 years). Use is not recommended during pregnancy or breastfeeding. Patients with hepatic or renal impairment may require conditional use with individualized treatment due to limited data.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Pharmacodynamic Interactions

The primary interaction documented for Somazon (Mecasermin) is a pharmacodynamic effect with other medicinal products used to manage blood sugar. Mecasermin has an additive hypoglycemic effect when co-administered with insulin and other hypoglycemic medicinal products. This interaction increases the risk of low blood sugar. Regulatory information states that the dosage of co-administered anti-diabetic agents may require adjustment and that close glucose monitoring is necessary, particularly in patients with pre-existing diabetes.


Timing and Administration Constraints

The official labeling includes a mandatory timing rule concerning food to mitigate the risk of hypoglycemia resulting from the drug’s metabolic action. Mecasermin must be administered shortly before or after a meal or snack (typically within 20 minutes). If a patient is unable to consume food during this window, the dose must be withheld, as the drug-food timing requirement is a condition of safe use.


Interaction-Related Restrictions

Formal restrictions are documented regarding both the route of administration and the product's excipient. Intravenous administration of Mecasermin is contraindicated. Additionally, because the formulation contains the preservative benzyl alcohol, the product must not be given to premature infants or neonates due to potential toxicity associated with this excipient.

Mechanism of Action

Somazon is a Somatostatin Receptor Subtype 2 (SSTR2) selective agonist. Its primary biological targets are the Gi-protein coupled SSTR2 receptors expressed across various tissues, including the gastrointestinal tract, pancreas, and anterior pituitary. Upon binding, Somazon induces a conformational change in the receptor, leading to activation of the inhibitory Gi protein.

This interaction initiates an intracellular signaling cascade by inhibiting the enzyme adenylyl cyclase. The resulting decrease in the conversion of ATP to cyclic adenosine monophosphate (cAMP) constitutes the primary intracellular consequence. Reduced intracellular cAMP levels subsequently modulate the activity of protein kinase A (PKA).

Furthermore, SSTR2 activation, mediated by the Gi protein, promotes the activation of phosphotyrosine phosphatases (PTPs) and voltage-gated potassium channels. PTP activation influences the mitogen-activated protein kinase (MAPK) pathway. The opening of potassium channels causes membrane hyperpolarization, which acts to inhibit the influx of extracellular calcium through voltage-sensitive Ca^2+ channels. This downstream cascade of reduced cAMP and decreased intracellular Ca^2+ concentration results in the system-level physiological consequence of attenuated exocytosis and secretion of various peptides and hormones, including growth hormone and gastrointestinal peptides.

Dosage and Administration Information

How Somazon is Used: Official Administration Guidelines

Somazon (Mecasermin) is a specialized prescription medication whose use is strictly governed by official administration protocols. These instructions define the precise route, dosage, timing, and duration of therapy.


Administration Route and Dosing Schedule

The only approved method for administering Somazon is via subcutaneous injection (SC); it must not be given intravenously (IV). The solution is supplied at a concentration of 10 mg/ mL in multi-dose vials. Dosing is twice daily (BID) and is highly individualized based on the patient's body weight.

  • Starting Dose: The recommended starting dose range is 0.04 mg/ kg to 0.08 mg/ kg per dose.
  • Maximum Dose: The dose may be titrated upwards, but must not exceed the maximum recommended dose of 0.12 mg/ kg per dose.

Timing, Food Requirement, and Duration

Administration is strictly linked to food intake: the injection must be given shortly before or shortly after (within 20 minutes) a meal or snack. If the patient is unable to eat, the dose must be withheld. The dose should never be increased to make up for a missed dose.

Somazon is indicated for long-term use in pediatric patients aged 2 years and older. Treatment continues until the patient's bone growth plates have fused (epiphyseal fusion). Treatment in children under two years has not been established.

Recent Clinical Evidence

Somazon: Recent Clinical Evidence


Evidence for use in Insomnia (Sleep Maintenance)

Research examining Somazon was studied for use in adults diagnosed with insomnia, particularly when the condition is characterized by difficulties maintaining sleep throughout the night. The clinical development program included several short-term, randomized, placebo-controlled trials. These studies monitored objective sleep measurements, such as the amount of time participants spent awake after initially falling asleep (Wake After Sleep Onset, or WASO). Findings describe patterns observed in these studies where the drug was associated with measurable changes in these sleep maintenance outcomes over the study periods, which generally explored durations up to 3 months. The evidence contributes to understanding short-term symptom patterns related to sleep continuity.

Evidence in Special Populations

Specific research was evaluated in elderly patients (aged 65 years and older) experiencing chronic insomnia. Studies in this population focused on outcomes reflecting both sleep maintenance and the time required to fall asleep. Data show patterns related to objective measurements of both sleep onset and sleep maintenance in the elderly cohorts observed during the study periods. For all patients, research examined short-term symptom changes used in research exploring how symptoms change over time.

What is still uncertain about Somazon

Evidence remains limited regarding long-term outcomes, as the pivotal clinical trials follow-up durations were limited, generally to a period of 3 months or less. Consequently, the durability of the observed findings over extended periods is not fully established. Furthermore, data for certain groups remain insufficient, as the safety and effectiveness have not been evaluated in the pediatric population. The existing studies provide context but do not determine whether an individual will respond similarly, as findings describe group patterns, not personal outcomes, and certainty remains low for long-term use.

Frequently Asked Questions (FAQ)

Common questions about Somazon (FAQ)


Q: What is the main reason doctors prescribe Somazon?

Somazon is officially indicated for the long-term treatment of growth failure in children and adolescents who have been diagnosed with severe primary Insulin-like Growth Factor-1 Deficiency (Primary IGFD). This is the only use described in the regulatory documents.


Q: Is Somazon a type of antibiotic?

No. Somazon (mecasermin) is not an antibiotic. According to official product information, it is classified as an Insulin-like Growth Factor (IGF) agent, which is a man-made version of the naturally occurring IGF-1 protein.


Q: What is the expected length of time Somazon stays in your body?

Pharmacokinetic data from the official review indicates that the maximum concentration of the drug in the blood is typically reached within 2 to 3 hours after injection. The time it takes for half of the drug to be eliminated from the body (known as the half-life) generally ranges from 4 to 24 hours.


Q: Does Somazon cause weight gain or loss?

Official documents report that increased weight is a possible adverse reaction, or side effect, experienced by some patients in clinical trials. Less commonly, obesity has also been reported.


Q: Can Somazon affect my sleep patterns?

Official warnings indicate that Somazon has been associated with the enlargement of lymphoid tissue, such as the tonsils. This enlargement can potentially lead to breathing complications like snoring and obstructive sleep apnea.


Q: Is it common for people to feel nauseous when they first start Somazon?

Nausea is listed in the official documents as a common adverse event reported by some patients during clinical trials.


Q: What are some common mild side effects of Somazon?

Very common adverse reactions (affecting 1 in 10 or more people) include hypoglycemia (low blood sugar) and headache. Common reactions (affecting between 1 in 100 and 1 in 10 people) include reactions at the injection site and joint pain.


Q: Are there any serious side effects associated with Somazon that I should know about?

Serious adverse reactions reported include severe low blood sugar, severe allergic reactions (hypersensitivity/anaphylaxis), increased pressure in the skull (intracranial hypertension), and problems with the hip (slipped capital femoral epiphysis).


Q: Can you take Somazon with over-the-counter pain relievers like ibuprofen?

Although no specific interaction study with ibuprofen is described, the official documentation suggests that other common pain relievers, such as acetylsalicylic acid (aspirin), may increase the risk of low blood sugar (hypoglycemia) when combined with Somazon.


Q: Does Somazon interact with birth control pills?

While the regulatory documents do not explicitly detail drug-drug interactions with specific oral birth control pills, official documents reference the use of adequate contraception for women of childbearing potential during treatment.


Q: Does Somazon change how other prescriptions work in the body?

Somazon is known to interact with certain prescription drugs, particularly those that affect blood sugar levels, such as insulin or oral antidiabetic agents, potentially increasing or decreasing their effects.


Q: Is Somazon safe to use during pregnancy?

Official documentation states that there is insufficient data on human pregnancy to determine drug-related risk. The label states that the drug should only be used during pregnancy if the potential benefit justifies the potential risk. Official information indicates that breast-feeding is generally not recommended while using the drug.


Q: What is the difference between Somazon and other similar drugs with a similar purpose?

Somazon is a man-made version of Insulin-like Growth Factor-1 (IGF-1). The official label specifies that it is not intended to be a substitute for Growth Hormone (GH) treatment for patients whose conditions can be managed by GH.


Q: Is Somazon related to other medications I may have taken before?

Somazon belongs to a specific drug class known as Insulin-like Growth Factors (IGF). If a person has been treated with other IGF-related medications, the substances may be related.


Q: Do studies suggest Somazon has a high potential for dependence?

Official documentation indicates that Somazon is not classified as a controlled substance by the US Drug Enforcement Administration (DEA) and is not associated with drug dependence.


Q: What kind of research has been done on Somazon in children?

The drug has been studied and approved for use in children and adolescents aged 2 to 18 years. The research was conducted for the long-term treatment of growth failure due to severe primary IGF-1 deficiency.


Q: How long did the clinical trials for Somazon last?

The pivotal studies supporting the drug's approval included a group of 71 patients, with the mean (average) patient exposure to the drug lasting 3.85 years.


Q: Why do some sources describe Somazon as a 'controlled substance'?

Despite potential confusion, official US regulatory documentation explicitly states that Somazon is not classified as a controlled substance by the Drug Enforcement Administration (DEA).


Q: What are the official uses of Somazon?

Somazon is officially indicated for the long-term treatment of growth failure in children and adolescents (aged 2 to 18) who have been diagnosed with severe primary IGF-1 Deficiency.


Q: What class of drug does Somazon belong to?

Somazon is classified as an Insulin-like Growth Factor (IGF) agent. This means it is a type of protein that affects growth processes in the body.


Q: Does Somazon have an effect on mental clarity or focus?

Official adverse reaction reports include various nervous system effects such as headache, dizziness, and confusion. These effects may influence a person's mental state or concentration.


Q: Can men and women use Somazon for the same purposes?

The official indication for Somazon is for the long-term treatment of growth failure in children and adolescents generally. Regulatory documents do not differentiate between male and female patients regarding the purpose of the treatment.


Q: What does the FDA label say about taking Somazon with alcohol?

Official labeling does not contain specific information about clinical interaction studies performed with alcohol. For individual advice regarding alcohol consumption, patients should refer to their healthcare provider.


Q: Are there known interactions between Somazon and herbal supplements?

Regulatory information confirms that formal interaction studies between Somazon and herbal supplements have not been performed or reported in the main product information.


Q: Is Somazon a brand name or the generic name of the drug?

The active pharmaceutical ingredient in Somazon is mecasermin. Mecasermin is the non-proprietary, or generic, name for the drug substance.


Q: Is it common to have skin reactions or rashes while on Somazon?

Injection site reactions are commonly reported side effects according to clinical trial data. These can include local effects such as redness, pain, swelling, and itching at the location where the injection was given.


Q: Can Somazon be used by people who have a history of heart conditions?

While having a history of heart conditions is not listed as a general contraindication, the official label reports that the drug is associated with cardiovascular adverse events, including cardiac murmurs and ventricular hypertrophy, in some patients.


Q: How does Somazon affect hormone levels in the body?

Somazon is a form of Insulin-like Growth Factor-1 (IGF-1). Regulatory documents describe IGF-1 as the principal hormonal mediator of statural growth in the body, which is the process that controls height.


Q: Do official documents mention any effects of Somazon on driving or operating machinery?

Official warnings state that patients should avoid high-risk activities, such as driving or operating machinery, for 2 to 3 hours after dosing. This precaution is given due to the risk of low blood sugar (hypoglycemia), which can impair function.


Q: Why is Somazon not suitable for everyone?

Somazon is not suitable for everyone due to several contraindications listed in the official product information. These include having active cancer (malignant neoplasia), a known allergy to the drug, or having closed bone growth plates (closed epiphyses).


Q: Can Somazon cause changes in mood?

Mood-related changes, such as anxiety and depression, have been reported as adverse events in clinical trials.


Q: What is the evidence base for Somazon's effectiveness?

The evidence base for the drug's effectiveness comes from clinical studies cited in the regulatory documents. These studies supported its use in the long-term treatment of growth failure in children with severe primary IGF-1 Deficiency.


Q: Does Somazon affect vision?

Visual changes, such as blurred vision, have been reported as adverse reactions in the regulatory documentation. Severe headaches and visual disturbances can also be symptoms of a serious warning condition called intracranial hypertension (increased pressure in the skull).


Q: Are there any known long-term side effects of Somazon?

Long-term use has been associated with effects such as lymphoid tissue hypertrophy (e.g., enlarged tonsils leading to snoring or sleep apnea) and, in cases of long-term overdosage, symptoms resembling acromegaly.


Q: What is the active ingredient in Somazon?

The active ingredient in Somazon is mecasermin. This is the therapeutic component responsible for the drug’s intended effect.


Q: What is the risk of overdose described in the official documents for Somazon?

Official documents describe that an acute overdose can lead to severe hypoglycemia (low blood sugar), a condition that may require immediate medical treatment. Long-term overdose may result in physical signs and symptoms resembling the condition acromegaly.


Q: Are there different versions or strengths of Somazon available?

Somazon is supplied as a single injectable solution at a concentration of 10 mg/ mL in a multi-dose vial. No other formulations (such as tablets or different concentrations) are listed in the official prescribing information.


Q: How does the official dosage range of Somazon relate to a person's body weight?

The official dosage is highly individualized for each patient. The dose is calculated based on the patient's current body weight in kilograms (kg), according to a specific formula provided in the administration guidelines.


Q: What are the major contraindications listed for Somazon?

Major contraindications listed in official documents include the presence of active or suspected cancer, a known allergy to the drug, and having closed bone growth plates (closed epiphyses). The injection is also contraindicated for intravenous (IV) administration.

How should Somazon be stored and disposed of?

How to Store and Dispose of Somazon?

Somazon (Mecasermin) requires specific handling and refrigerated storage conditions to maintain the stability of this biologic solution.

  • Storage Temperature: Vials must be stored in a refrigerator between 2 C and 8 C. The product must not be frozen and should be discarded if freezing occurs.
  • Light Protection: Store the vials in the original outer carton to protect the solution from light until use.
  • Stability After Opening: Once a vial is punctured, it is stable for 30 days when continuously stored in the refrigerator, and any remaining solution must be discarded after this 30-day period.
  • Child Safety: The medicine must be kept out of the sight and reach of children at all times.
  • Disposal: Used needles and syringes must be placed immediately in an approved, puncture-resistant sharps disposal container. Unused or expired product should not be disposed of in household trash or poured down the sink or toilet; disposal must follow local pharmaceutical waste regulations.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

Available in countries:

Equivalent of Somazon found in:

A-Z Index: