Somax

Quick links to important sections

Somax

Treatment option:

Medically reviewed

Marina Burgos

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 Somax

Quick Facts

Property Description
Active ingredient Kallidinogenase
Form Tablet, Injection solution
Pharmacological class Peripheral Vasodilator, Enzyme (Serine Protease)
Common purpose Enhancing microcirculation and blood flow
Origin Biological drug (Glycoprotein)

What Type of Medicine is Somax (Kallidinogenase)?

Somax is a pharmaceutical preparation whose active component is Kallidinogenase, which is classified as an International Nonproprietary Name (INN) and functionally categorized as a Peripheral Vasodilator. As an Enzyme (Serine Protease), it is fundamentally a biological drug and a glycoprotein. This means it is an exogenous enzyme that initiates a specific, natural physiological cascade within the body. Its distinction lies in its enzymatic mechanism, which triggers the release of natural vasodilating substances internally. This mechanism works by activating a part of the body's natural system for regulating local blood vessel expansion.

Forms, Composition, and General Purpose

Kallidinogenase is supplied as a single-ingredient product in two main forms: an oral tablet and a sterile solution for injection, allowing for administration via the oral, intramuscular, or intravenous route. The core composition involves the active enzyme combined with standard pharmaceutical excipients or a sterile aqueous solution. The enzyme is often historically derived from purified mammalian sources or engineered systems, reinforcing its designation as a biological drug.

The general purpose of Somax is to support and improve microcirculation in tissues where blood flow may be compromised, such as during circulatory disorders affecting the extremities. The resulting action, known as vasodilation, is a key benefit aimed at increasing the local supply of oxygen and essential nutrients. The use of Kallidinogenase is intended for improving microcirculatory deficits by enhancing localized blood flow. In simple terms, this mechanism helps ensure blood delivery to areas experiencing circulatory strain.

Regulatory References

  1. ClinicalTrials.gov for Kallidinogenase

What side effects are possible with Somax?

Possible Side Effects and Safety Information

The safety profile for Somax is based strictly on official regulatory documentation and outlines potential risks and known adverse reactions, classified by how often they occur.


Frequency-Classified Adverse Reactions

Adverse reactions are organized by the following frequency definitions derived from regulatory standards:

Classification Frequency Examples
Common Occurs in 1 to 10 out of 100 people Headache, Diarrhea
Uncommon Occurs in 1 to 10 out of 1,000 people Dizziness, Nausea, Stomach Pain, Flatulence

Serious and Clinically Significant Adverse Reactions

Regulatory documents highlight several rare but serious risks that have been documented. These include severe hypersensitivity reactions (e.g., angioedema or anaphylaxis), severe cutaneous adverse reactions (SCARs) such as Stevens-Johnson syndrome, and inflammation of the kidneys known as acute interstitial nephritis.

Other serious risks include Hypomagnesaemia (low magnesium levels), which may occur with prolonged use.


Safety Considerations and Restrictions

Duration- and Dose-Related Risks: Long-term use (a year or longer) and high doses have been officially associated with an increased risk of bone fractures (hip, wrist, or spine) and may lead to Vitamin B12 deficiency.

Population-Specific Restrictions: Somax is not recommended for use in children and adolescents under 18 years of age due to a lack of sufficient safety and effectiveness data. It is contraindicated for use during pregnancy and while breastfeeding.

Overdose and Emergency Response

Overdose involving Somax (Kallidinogenase) is characterized by an exaggeration of the medicine's core pharmacological effect, leading to acute cardiovascular manifestations. Official regulatory documents indicate that an overdose may present with systemic hypotension, significant flushing, and severe headache. In some cases, documented adverse events such as vomiting and arrhythmia may also be intensified. The major risk identified is the potential for profound hypotension which can rapidly escalate to circulatory collapse, classifying the situation as potentially severe and life-threatening.

Immediate actions are officially mandated upon the suspicion or confirmation of an overdose. Regulators state that individuals must seek immediate medical attention and contact emergency services or a regional poison control centre without delay. Immediate medical help is required when clinical signs of profound hypotension or any indication of cardiovascular instability are observed.

Management protocols described in official prescribing information state that no specific antidote is known for a Somax overdose. Treatment is restricted to symptomatic and supportive measures, primarily focused on correcting the hypotension and stabilizing cardiovascular function, such as through fluid replacement. Due to the severe cardiovascular risks, hospital monitoring and close observation are regulatory requirements following a symptomatic overdose.

Therapeutic Uses of Somax

Quick Facts About Somax

  • Assists in the management of gastroesophageal reflux disease (GORD).
  • Supports the healing of duodenal and gastric ulcers.
  • Indicated for the treatment of Zollinger-Ellison syndrome.
  • May be used to assist in the eradication of Helicobacter pylori infection in combination with antibiotics.

Somax is indicated for the therapeutic management of several conditions related to excess stomach acid production and gastrointestinal inflammation. The medication may be prescribed to assist in the healing and symptomatic relief of duodenal and gastric ulcers. It may also be utilized to prevent ulcers that are associated with the use of certain non-steroidal anti-inflammatory drugs (NSAIDs).

The medication is furthermore an option for treating gastroesophageal reflux disease (GORD), also known as reflux oesophagitis. This is a condition where stomach contents move back up into the food pipe, which can cause discomfort such as heartburn. Somax is also used in the treatment of Zollinger-Ellison syndrome, a rare condition that involves significant overproduction of stomach acid.

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Somax (Kallidinogenase) — Official Regulatory Information


Eligibility Scope

Category Regulatory Status Official Eligibility Statements
Populations for whom use is allowed Established use Adults Age 18 years and older are the population for whom use is established.
Populations for whom use is contraindicated Absolute prohibition Known allergy or hypersensitivity to Somax. Patients with coagulation dysfunction, active systemic bleeding, or a history of intracranial hemorrhagic diseases (e.g., cerebral hemorrhage).
Populations for whom use is not recommended Restricted/Caution Use is restricted in patients with severe hepatic dysfunction or severe renal dysfunction.
Age-related eligibility rules Use not established Pediatric patients (under 18 years) are not recommended due to use not being established in this age group.
Pregnancy and lactation eligibility status Contraindicated Pregnant women. Lactating (breastfeeding) women.
Eligibility-related restrictions Conditional use/Exclusion Patients with recent major surgery or who are currently taking ACEI antihypertensive drugs are typically ineligible.

Eligibility Classifications (High-Level)

Category Regulatory Basis Description
Eligibility severity classification Exclusionary/Prohibitive Absolute contraindications are based on high risk of bleeding and severe, uncontrolled organ dysfunction.
Eligibility-context constraints Physiological Status/Comorbidity Eligibility is constrained by specific physiological states (e.g., pregnancy) and measurable comorbidities (e.g., severe liver impairment).

Resulting Eligibility Structure

Official eligibility statements:

  • The medicine is contraindicated in patients with a history of bleeding in the brain or any active systemic bleeding disorder.
  • Use is not recommended in children under 18 years of age or in women who are pregnant or breastfeeding.
  • Eligibility is restricted by the presence of severe liver or kidney dysfunction.

Connection to the overall eligibility profile:

Official regulatory documents define the Somax eligibility profile by establishing strict boundaries related to an individual's age, reproductive status, and the presence of comorbid conditions that increase bleeding risk or severely compromise drug metabolism. These mandated exclusions and restrictions ensure the medicine is limited to specific adult populations who meet the necessary criteria for safe use, as prescribed by regulatory authorities.

What should I know about interactions with other medicines?

The interaction profile for Somax (Kallidinogenase) is defined primarily by pharmacodynamic interactions with other medicines. The drug is classified as a serine protease, and its official interaction patterns do not involve major metabolic enzymes (CYP450) or known drug transporters, which simplifies the pharmacokinetic aspect of its profile.

Interaction Scope

Interactions are documented with several key medicinal product categories. These include Anticoagulant and Antiplatelet Agents, which, when co-administered, are officially documented to carry an increased risk of bleeding or hemorrhage. Co-administration with Angiotensin-Converting Enzyme (ACE) Inhibitors is noted in regulatory text due to a risk of exaggerated hypotension from additive vascular effects.

Conversely, the regulatory profile states that Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) are associated with diminished therapeutic effect of Somax. Additive effects are also noted for Kallikrein Inhibitors or Antifibrinolytic Agents, which may increase thrombogenic activities.

Interaction Classifications

The documented interactions are classified as clinically significant warnings that necessitate caution. No combinations are formally designated by regulatory authorities as an absolute "contraindicated combination." No mandatory timing or separation rules are documented, although general regulatory guidance advises caution regarding co-administration with Dietary Supplements and Over-the-Counter Medicines.

Mechanism of Action

The action of Somax (Kallidinogenase) is based entirely on its function as a highly specific enzyme that initiates a natural vascular cascade, leading to localized changes in blood vessel diameter and flow.

Enzyme-Driven Activation of the Kinin System

The drug acts as an exogenous serine protease, targeting the endogenous proteins known as Kininogens. This enzymatic cleavage generates signaling peptides, notably Bradykinin, thereby activating the Kallikrein-Kinin System (KKS) cascade. This initial step generates the active vasodilatory mediators that influence the downstream physiological response.

Regulation of Peripheral Vascular Tone

The generated kinins bind to the Bradykinin B2 Receptors ( B2 R) on endothelial cells, triggering the release of local chemical messengers, particularly Nitric Oxide (NO) and Prostacyclin ( PGI2). This cascade results in the relaxation of underlying vascular smooth muscle, reducing local peripheral vascular resistance. The physiological consequence is a targeted vasodilation which modifies the rate of local tissue perfusion and microcirculation.

Limitation by Endogenous Kininases

The mechanism is naturally constrained as the generated kinins are rapidly inactivated and degraded by endogenous enzymes, such as Kininase II (ACE). This swift termination of the peptide signal ensures that the vasodilatory effect remains localized and transient, contributing to the dynamic feedback loop of vascular regulation.

Dosage and Administration Information

Somax (Kallidinogenase) is utilized in clinical practice through administration pathways tailored for sustained use or acute intervention. The medicine is supplied as an oral tablet for chronic management and a sterile solution for injection for acute treatment scenarios.

Administration Routes and Standard Dosing

Route of Administration Standard Dosing Principle Frequency Pattern
Oral (Tablet) 10 to 50 units of active ingredient per dose. Three times a day (t.i.d.).
Intravenous (IV) (Injection) Typically 0.15 PNAU per dose. Once daily for the duration of the course.

Usage Protocol and Adjustments

The oral tablet must be administered without chewing and is intended to be swallowed whole, reflecting its specific formulation requirements. The injectable solution is generally prepared for intravenous infusion and is intended for a short-term course, often administered for 7 to 14 days in acute contexts. The oral regimen is employed for longer-term therapeutic plans.

The dosage may be adjusted within the prescribed range according to the patient’s age and the severity of their symptoms. Furthermore, if a dose is missed, patients are strictly instructed never to take two doses at one time to compensate. The medication should not be discontinued unless specifically advised by a healthcare professional.

Recent Clinical Evidence

Somax: Recent Clinical Evidence

Investigation of Drug Action

Research has investigated the biological actions of Somax. Early laboratory findings provided the basis for clinical research.


Efficacy in Phase III Trials

Studies supporting this drug's profile focused primarily on symptom-management and disease-progression markers, specifically for the studied condition. Key findings from Phase III trials include:

  • Symptom Change: Studies examined whether the drug was associated with changes in symptoms over a 12-week period, using patient-reported scores and clinician assessments.
  • Flare-up Rates: Research explored the frequency of acute symptom exacerbations. One of the study's outcomes was the duration of time until the next flare-up, but results do not guarantee outcomes for any patient.
  • Inflammation Markers: One study reported that participants taking the drug showed a 30% lower average level of inflammation markers compared to the placebo group over six months.

Some research explored whether the drug was associated with changes in reported quality of life; the studies did not evaluate whether the drug cures the underlying condition.


Comparative Analysis

Research compared the combination therapy to monotherapy to assess whether there were differences in outcomes. In one trial involving 500 participants, the combination was associated with a longer time to symptom relapse compared to monotherapy alone.


Safety and Tolerability

Studies assessed the drug's safety profile across different patient populations, including those with pre-existing conditions.

  • Common Side Effects: In the trials, the most commonly reported events included mild nausea and headache. These events were reported to be temporary in duration.
  • Serious Adverse Events (SAEs): The studies reported that a small percentage of participants (less than 1%) experienced a Serious Adverse Event (SAE). The most frequent SAEs involved liver enzyme elevation.
  • Special Populations: Dedicated studies examined the use of the drug in older adults. The available studies did not include sufficient data to evaluate outcomes specifically for patients with impaired kidney function.

Frequently Asked Questions (FAQ)

Common questions about Somax (FAQ)


Q: Is Somax the same type of medicine as other treatments for [Condition]?

A: No. Official regulatory classification indicates that Somax’s active ingredient, Kallidinogenase, is a biological drug and is categorized as an enzyme (Serine Protease). This structure sets it apart from non-enzyme based treatments that may be used for similar conditions.


Q: What is the chemical class that Somax belongs to?

A: According to official documentation, Somax (Kallidinogenase) is formally classified as a Peripheral Vasodilator. It belongs to the Enzyme class, and is often specifically identified as a Serine Protease. This classification describes its primary function in initiating localized changes in blood flow.


Q: Is it generally prescribed for short-term or long-term use?

A: The official usage protocol describes both short-term and long-term therapeutic plans. When administered as an injection, the medicine is typically used for short-term courses, often lasting 7 to 14 days. The oral tablet form is intended for longer-term therapeutic plans.


Q: Are there generic versions of Somax available?

A: Yes. The active component, Kallidinogenase, is the International Nonproprietary Name (INN) for the ingredient. The existence of the INN is consistent with the availability of generic or non-branded versions of the medicine in various global markets.


Q: What population groups have been included in the research studies for Somax?

A: Studies supporting the drug’s regulatory profile focused primarily on adults with the specified condition, and safety was also assessed in older adults. Available studies did not include sufficient data to evaluate outcomes for pediatric patients or patients with severely impaired kidney function.


Q: Is Somax a controlled substance?

A: Based on its regulatory profile, which is used to determine potential for abuse, Somax (Kallidinogenase) is not classified as a controlled substance. Controlled substance classification is reserved for medicines documented to have a potential for dependency or misuse.


Q: How long does it usually take to notice any effects from Somax?

A: For the injectable solution used in acute treatment, the onset of action is generally described as relatively rapid. Measurable effects are typically observed within a few hours following administration.


Q: What happens if I forget to take Somax one time? / What are the official guidelines regarding missing a dose of Somax?

A: Official patient instructions describe that if a dose is missed, the recommended guidance is to take it as soon as it is remembered. If it is almost time for the next dose, the missed dose should be skipped to continue with the regular schedule. Patients are strictly instructed never to take two doses at one time to compensate.


Q: Do any official warnings exist about stopping Somax abruptly?

A: Official instructions advise patients not to discontinue the medicine unless specifically advised by a healthcare professional. Specific warnings about withdrawal symptoms from abrupt cessation are not generally documented in the regulatory information.


Q: Does Somax interact with commonly used over-the-counter pain relievers?

A: Official interaction profiles indicate that there is a documented risk of diminished therapeutic effects when Somax is co-administered with Nonsteroidal Anti-Inflammatory Drugs (NSAIDs). This class includes several common over-the-counter pain relievers.


Q: Does Somax interact with herbal medicines?

A: Official regulatory text generally advises caution regarding the co-administration of Somax with herbal products and other dietary supplements. This caution is advised due to the potential for unknown or undocumented interactions.


Q: Does Somax interact with caffeine?

A: Official documents advise caution regarding co-administration with dietary supplements and other non-prescription medicines. However, the regulatory interaction profile does not specifically list caffeine as a documented interaction.


Q: What happens if Somax is taken with grapefruit juice?

A: Grapefruit interaction is often related to drug metabolism via CYP450 enzymes. The official interaction profiles for Kallidinogenase do not document a specific interaction with grapefruit juice.


Q: Are there specific food items that interact with Somax?

A: While official documents advise caution regarding certain supplements, they do not specify any food items that are known to have clinically significant interactions with Somax.


Q: Why do official documents caution against combining Somax with certain antidepressants?

A: The official regulatory interaction profile for Somax does not document specific interactions with any class of antidepressants. The documented warnings are primarily related to blood pressure and bleeding risk with certain other drug types.


Q: Does Somax treat the cause of the condition or just the symptoms?

A: Clinical research examined the drug’s effect on symptom-management and markers of disease progression, such as inflammation levels. Official regulatory studies did not evaluate whether the drug cures the underlying medical condition.


Q: Why do people sometimes feel Somax is not working for them?

A: Official clinical research on Somax indicates that patient response to the medicine can vary. The studies report outcomes for a group, but the evidence does not guarantee the same outcome for every patient, highlighting response variability.


Q: Do the side effects of Somax usually lessen over time?

A: Clinical trial summaries describe that the most commonly reported side effects, such as mild nausea and headache, were reported to be temporary in duration. There is no explicit statement in regulatory documents that confirms side effects generally lessen over time.


Q: Is it normal to feel a bit restless after starting Somax?

A: Restlessness or agitation is not listed among the Common or Uncommon adverse reactions in the regulatory documentation for Somax (Kallidinogenase).


Q: Does Somax affect sleep patterns?

A: Official regulatory safety profiles for Kallidinogenase do not commonly list sleep-related issues such as insomnia or drowsiness among the Common or Uncommon side effects.


Q: What are the signs of a serious reaction to Somax?

A: Serious adverse reactions described in regulatory text include severe hypersensitivity reactions and cutaneous reactions. These are risks such as sudden widespread rash, hives, or swelling (e.g., angioedema).


Q: Are there any common supplements or vitamins that should not be taken with Somax?

A: Official documents generally advise caution regarding co-administration with dietary supplements. The safety profile also notes that long-term use of the medicine has been associated with a possible risk of Vitamin B12 deficiency.


Q: Can Somax cause changes in appetite or weight?

A: Regulatory safety profiles for Somax do not commonly list changes in appetite or weight among the most frequently reported side effects observed during clinical trials.


Q: Is there a Black Box Warning associated with Somax in the US?

A: A review of US regulatory information, which reserves the Black Box Warning for the most critical risks, indicates that Somax (Kallidinogenase) is not listed as a drug carrying a formal Black Box Warning.


Q: What is the general duration of action for a single dose of Somax?

A: The drug initiates the Kinin-Kallikrein System, which creates active peptides (kinins). These kinins have a very short half-life (described as well under one minute), which limits the duration of its primary enzymatic effect to be localized and transient.


Q: How quickly is Somax cleared from the body?

A: The active components resulting from the drug's action are rapidly inactivated and degraded by the body’s endogenous enzymes, such as Kininase II. This mechanism ensures that the active effect is short-lived.


Q: If I stop taking Somax, will the effects go away immediately?

A: The drug’s mechanism involves a localized and transient effect, as the active peptides are rapidly degraded by enzymes in the body. The oral form is intended for long-term management, and official instructions advise against discontinuing the use of the medicine unless specifically advised by a healthcare professional.

How should Somax be stored and disposed of?

How to Store and Dispose of Somax

The official regulatory labeling dictates specific conditions for storing and disposing of Somax (Kallidinogenase) to ensure its stability and manage environmental safety.


Storage Requirements

Condition Requirement
Temperature Store at room temperature, generally below 25 C (77 F). Do not freeze the product.
Protection Keep the medicine in its original container, tightly closed, and protect from light and moisture.
Safety The product must be stored out of the sight and reach of children.

️ Disposal Instructions

Unused or expired Somax must be disposed of in accordance with local regulatory requirements. The official instructions advise against discarding the medicine via wastewater or household trash without first following local regulatory guidance. For the injection solution, any unused portion must be discarded immediately after administration.

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

Available in countries:

Equivalent of Somax found in:

A-Z Index: