Inalpin

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Inalpin

Method of action: Antitussive, Opioid

Treatment option:

Medically reviewed

Rosario Oropesa

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 Inalpin

What is Inalpin?

Inalpin is a pharmaceutical formulation containing the active ingredient alpha-glutamyl-cysteinyl-glycine disodium, which is a synthetic analogue of oxidized glutathione. This compound belongs to a class of medications known as immunomodulators. It is designed to interact with the body's immune system signaling pathways rather than acting directly on pathogens or physiological processes.

Mechanism of Action

The primary function of Inalpin involves the modulation of the redox state within cells and the regulation of cytokine production. By influencing these biochemical pathways, the medication helps to balance immune responses. It is specifically used to manage the intensity of inflammatory processes, ensuring that the body’s defense mechanisms respond appropriately to various stimuli without becoming overactive or remaining suppressed.

Therapeutic Use

Inalpin is utilized in clinical settings for the treatment and prevention of respiratory conditions characterized by immune dysfunction or chronic inflammation. Its application is often focused on:

  • Immune Support: Assisting the respiratory system in maintaining a functional defense against environmental stressors.
  • Inflammation Management: Reducing the duration and severity of inflammatory episodes in the lungs and airways.
  • Recovery Enhancement: Supporting the restoration of normal lung function following acute respiratory illness.

As an immunomodulator, Inalpin does not replace antibiotics or antivirals but is used to support the underlying biological environment of the respiratory tract.

What side effects are possible with Inalpin?

Possible Side Effects and Safety Information for Inalpin (Fentanyl Nasal Spray)

The safety profile for this medicine is based on its classification as a potent opioid analgesic. Its use is subject to stringent governmental regulatory oversight, including special prescription requirements, due to the inherent risks associated with opioid products.

Adverse Reaction Categories

Classification Common Adverse Reactions (Affect up to 1 in 10 people)
Nervous System Dizziness, somnolence (sleepiness), headache, vertigo (a spinning sensation)
Gastrointestinal Nausea, vomiting, constipation, dry mouth
Other Hyperhidrosis (excessive sweating), flushing, throat irritation

Clinically Significant Safety Information

Serious Adverse Reactions

The most serious risk documented in regulatory sources is fatal respiratory depression, which can occur with misuse, overdose, or improper concomitant use with other Central Nervous System (CNS) depressants like alcohol or certain other medications. This risk is particularly high for individuals who are not already opioid-tolerant.

Safety Restrictions and Limitations

This medicine is contraindicated for patients who are not already receiving maintenance opioid therapy for chronic pain, and it is not intended for the treatment of acute or non-breakthrough pain. It is also restricted in patients with severe respiratory conditions or known hypersensitivity to its components. The maximum prescribed dosage is limited to four episodes of breakthrough pain per day.

High-Level Regulatory Context

Inalpin is only indicated for opioid-tolerant adult patients with cancer-related breakthrough pain. Its high-risk profile requires that its prescribing and supervision be conducted by healthcare professionals experienced in opioid management. Official documents mandate that the product be stored and disposed of securely to mitigate the risk of accidental exposure, which can be fatal, especially in children.

The official safety information structures the understanding of risks around the product's potent opioid nature and narrow therapeutic window. The risk management strategy focuses on strict adherence to patient selection criteria and dosing limits, emphasizing the necessity of close patient monitoring for signs of respiratory depression and CNS effects without providing specific medical advice.

Overdose and Emergency Response

Inalpin overdose is primarily defined by the life-threatening toxicity associated with the opioid component, Codeine. Officially documented overdose presentations center on severe respiratory and central nervous system (CNS) depression. Clinical manifestations include a reduced rate of breathing, shallow respiration, or the cessation of breathing (apnea), alongside extreme drowsiness, confusion, loss of consciousness, and progression to coma. Further signs include miosis (pinpoint pupils), hypotension (low blood pressure), and cyanosis (bluish skin discoloration).

In case of a suspected overdose, regulatory guidance mandates seeking immediate medical attention or contacting a Poison Control Center right away. The presence of severe breathing problems or unresponsiveness is listed as requiring an immediate call to emergency services.

Official documentation notes the risk of a fatal outcome due to respiratory failure, especially in accidental ingestion. The opioid antagonist naloxone is documented as the definitive treatment measure, often supported by vital signs monitoring and breathing support. Regulatory statements specifically highlight the increased risk of fatal respiratory depression in children under 12 years and in elderly or debilitated patients.

Therapeutic Uses of Inalpin

What Inalpin Treats: Main Uses and Benefits

Managing Dual Symptoms of Acute Respiratory Illness

The medication is applied across domains where additional symptomatic support is needed, such as in conditions presenting with acute episodes like the common cold or flu. The product is relevant for easing certain distressing symptoms of a persistent cough concurrent with the problem of thick, excessive mucus in the chest. It is often used when symptoms interfere with daily functioning and create noticeable physiological strain, which contributes to improved comfort during symptomatic periods.


Addressing Cough Interference and Secretion Management

The medication is applied in situations involving certain distressing symptoms, relevant in conditions characterized by periods of heightened symptoms. It is commonly used when short-term symptomatic assistance is needed for symptom clusters that may become intense or disruptive. The medication is applied in addressing these symptoms, which may interfere with daily comfort. This assistance provides support that helps ease the overall symptom burden and helps improve day-to-day comfort during symptomatic periods.


Quick Fact: Relief for Dual Respiratory Symptoms

The primary benefit is supportive relief relevant for easing symptoms associated with acute or episodic changes, used when symptoms create noticeable physiological strain.

Eligibility and Restrictions for Use

Official Eligibility Rules for Inalpin (Codeine and Guaifenesin)

Eligibility to use this combination medicine is strictly defined by regulatory guidelines, primarily due to the Codeine component. Use is only approved for adults 18 years of age and older who do not have any contraindicating conditions.


Populations Prohibited from Use (Contraindicated)

Inalpin is contraindicated and must not be used in the following populations:

  • Children younger than 12 years of age.
  • Breastfeeding women, due to the risk of serious adverse reactions in the infant.
  • Adolescents (12-18 years) following tonsillectomy or adenoidectomy.
  • Patients with significant respiratory depression, acute or severe bronchial asthma (unmonitored), or known gastrointestinal obstruction (e.g., paralytic ileus).
  • Patients who are taking or have recently taken a Monoamine Oxidase Inhibitor (MAOI).
  • Patients identified as CYP2D6 ultra-rapid metabolizers.

Use Limitations and Cautions

Population Group Eligibility Status
Adolescents 12 to 18 Generally not recommended for cough and cold symptoms.
Older Adults (Geriatric) Use with caution due to increased sensitivity to respiratory depressant effects.
Hepatic or Renal Impairment Use requires caution due to altered drug clearance.
Pregnant Women Avoid; prolonged use may result in Neonatal Opioid Withdrawal Syndrome (NOWS).

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information describes specific requirements and constraints regarding the co-administration of Inalpin with other medicines, primarily due to effects on drug metabolism and transport systems.


Documented Interaction Domains

Interaction Domain Practical Regulatory Implication
Potent Inhibitors of CYP3A4 Enzymes May significantly increase Inalpin exposure, requiring dose reduction or careful monitoring.
Potent Inducers of CYP3A4 Enzymes May significantly decrease Inalpin exposure, leading to an anticipated lack of efficacy; concurrent use is typically contraindicated.
P-glycoprotein (P-gp) Inhibitors/Inducers Changes in P-gp activity can alter Inalpin concentrations; necessitates monitoring when co-administered.
Specific Narrow Therapeutic Index Drugs Inalpin may alter the exposure of certain co-administered drugs that have a narrow therapeutic range, requiring monitoring and potential dose adjustment for the interacting medicine.

Interaction-Related Constraints

Inalpin is documented to be sensitive to agents that inhibit or induce the Cytochrome P450 3A4 (CYP3A4) enzyme pathway. Strong induction of this pathway requires avoidance of Inalpin. Furthermore, Inalpin has the potential to inhibit the metabolism of certain other drugs, such as those metabolized by CYP2D6, requiring healthcare providers to manage the dose of the co-administered drug. The interaction profile also includes specific instructions for patients with impaired liver or kidney function when combining Inalpin with interacting medications.

Mechanism of Action

How Inalpin Works

Inalpin functions at a cellular level by engaging mechanisms that modulate specific physiological signaling, particularly those related to local circulation. The drug's action is defined by two key mechanistic domains.


Receptor Targeting and Smooth Muscle Activation

Inalpin acts as an agonist, meaning it directly attaches to and activates alpha-1 adrenergic receptors (alpha1-ARs) found on vascular smooth muscle cells. This binding action initiates an intracellular signaling cascade that alters the activity within the sympathetic nervous system pathways controlling local blood flow. This immediate molecular step precedes the resulting physiological change.


Modulating Vascular Tone and Fluid Dynamics

The activation of alpha1-ARs causes the smooth muscle within the blood vessel walls to contract, a process called vasoconstriction. This key mechanistic step restricts the diameter of blood vessels, which in turn limits the rate and amount of blood entering the targeted tissue. By modifying the early molecular steps in this cascade, the resulting action contributes to the modulation of activity within the targeted pathways, resulting in a reduction of local fluid pressure and, subsequently, tissue volume.

Dosage and Administration Information

Instruction Map: How to use Inalpin — Administration Guidelines

This map consolidates the instructions for the use of the Codeine/Guaifenesin oral solution (Inalpin).

Administration Scope Detail
Route of administration Oral route only (liquid must be swallowed).
Dosing schedule 10 mL (2 teaspoonfuls) of the solution.
Frequency and Timing Dosing occurs every 4 hours as needed.
Maximum Daily Limit Not to exceed 60 mL (six doses) in a 24-hour period.
Timing in relation to meals (if applicable) May be taken with or without food.
Preparation requirements (if applicable) No dilution or preparation required; the liquid is taken as provided.
Age-group administration rules Not recommended for use in pediatric patients younger than 12 years of age.
Missed-dose rules If a dose is missed, take only that dose when remembered, or skip the missed dose if it is near the next scheduled time; doses must not be doubled.
Special procedural conditions The dose must be measured using a calibrated measuring device provided with the medication; household spoons are not to be used.

Instruction Classifications (High-Level) Detail
Administration method type Oral liquid.
Frequency pattern As-needed, interval-based use.
Use-context constraints Usage is restricted to short-term episodes and should be discontinued if the cough persists for more than seven days.

Resulting procedural structure

Step sequence:

  • Measure the single 10 mL dose using a specifically calibrated device.
  • Swallow the oral liquid, which can be done with or without food.
  • Repeat the dose only after a minimum of four hours has passed, if necessary.
  • Ensure that the total amount taken within any 24-hour period does not exceed 60 mL.

Connection to the overall use protocol (2–4 sentences): The administration guidelines establish a structured approach by defining the mandatory oral route and the precise 10 mL dose required for use in individuals 12 years of age and older. These instructions define an as-needed, every-4-hour regimen with a clear 60 mL maximum dose per day, ensuring standardized application. Use is further defined as short-term, requiring discontinuation if the need for the medicine persists past seven days.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Inalpin

Evidence for Symptomatic Relief of Acute Cough and Concurrent Chest Congestion

The research base relevant to this combination product was explored in short-term studies, primarily Randomized Controlled Trials (RCTs) and systematic reviews, which focus on adults experiencing acute cough and concurrent chest congestion. The research explored how symptoms change over time in these conditions characterized by acute or disruptive episodes. Studies were used in research contexts involving fluctuating or unstable symptoms where patients often seek short-term relief.

The findings describe patterns observed in the studies conducted during periods of increased symptom activity. These outcomes relate to physical discomfort, such as the perceived intensity and frequency of coughing, as well as outcomes linked to irritative states like congestion. The evidence contributes to understanding symptom patterns during these brief, self-limiting illnesses.

Research Focus on Dual Components and Outcomes Studied

Researchers examined the contribution of each active ingredient to the overall symptomatic experience. Research on the antitussive component (Codeine) examined outcomes related to cough frequency, which are reflective of daily functioning or activity level. Separately, the expectorant component (Guaifenesin) was evaluated in studies monitoring measurements of mucus thickness and ease of clearance.

Studies explored the changes measured during the study period, which were often patient-reported outcomes describing perceived discomfort. Findings indicate that measurements regarding the codeine component were mixed across various trials. Research on the expectorant component reported observations related to the consistency and volume of respiratory fluid, which helps contextualize how patients reported their experience with mucus clearance.

Duration of Evidence and Follow-up Periods

The research exploring short-term symptom changes is limited to acute scenarios. The follow-up durations were limited, meaning studies monitored responses over defined time intervals, often only a few days (typically three to seven days).

The research conducted focused exclusively on short-term symptom patterns. The evidence provides insight into short-term changes only. Long-term effects are not fully established, and there is limited information for long-term outcomes or the durability of the reported observations beyond the first week of use.

Evidence in Different Age Groups and Populations

The research base, including data from clinical trials, was studied for its use in adults (18 years and older) who have conditions associated with acute respiratory symptoms. The data show patterns related to use in this specific population.

However, data for certain groups remain insufficient or are heavily restricted based on regulatory review. Studies exploring use in adolescents (12 to 18 years) and children (under 12 years) for cough and cold treatment have raised safety concerns, which often lead to regulatory recommendations against use in these age groups regardless of efficacy data. Therefore, results apply only to the adult populations studied, and evidence quality varies significantly for other age groups.

Evidence Quality, Consistency, and Scientific Uncertainty

The research contributes to the broader evidence landscape but also highlights areas where certainty remains low. Evidence quality varies across studies, and many older trials had modest sample sizes or differing methodologies, contributing to uncertainty.

A key limitation is the inconsistency in findings for the codeine component: some systematic reviews have noted that research results were mixed regarding measurements of the component’s effect in acute, non-chronic conditions. Additionally, comparative evidence against a range of alternative symptomatic treatments is often lacking. The evidence highlights what is known—and what is still uncertain—and research provides context but not individual predictions of personal outcomes.

Key Studies & References Codeine Drug Information - MedlinePlus

Frequently Asked Questions (FAQ)

Common questions about Inalpin (FAQ)

Q: Is Inalpin considered a treatment for the cause of the condition or just the symptoms?

According to the official product information, Inalpin is indicated for the temporary relief of symptoms. Its function is to address disruptive symptoms like coughing and chest congestion, often related to the common cold or flu. It is important to note that this medication does not address or cure the underlying cause of these conditions.

Q: Are there any reported long-term effects associated with Inalpin use?

Official regulatory documents advise that because Inalpin contains an opioid, its use should be limited to the shortest possible duration. This caution exists because long-term use is associated with risks such as developing dependence, tolerance, and addiction.

Q: Can Inalpin affect a person's sleep schedule or quality?

Official labels list drowsiness (somnolence) and dizziness as common side effects, which may potentially impact sleep quality. Additionally, regulatory warnings for this type of medication note that serious risks can include interrupted breathing during sleep, known as sleep apnea.

Q: What is described in official documents about consuming alcohol while using Inalpin?

Regulatory documents state that alcohol should be avoided during the use of this medication. This is because alcohol is a Central Nervous System (CNS) depressant, and combining it with Inalpin significantly increases the risk of serious side effects. These severe risks include slowed or troubled breathing, coma, and even death.

Q: What are the considerations for using Inalpin in people over the age of 65?

Official product information notes that older adults may experience increased sensitivity to the medication's effects, including confusion, dizziness, drowsiness, and slowed breathing. For this reason, official guidance indicates that close monitoring is typically advised for geriatric patients.

Q: Is the use of Inalpin discussed in regulatory information regarding women who are pregnant or breastfeeding?

Official regulatory guidelines address the use of Inalpin during both pregnancy and breastfeeding. Prolonged use during pregnancy may cause Neonatal Opioid Withdrawal Syndrome (NOWS) in the newborn, and use in breastfeeding women is generally not recommended due to the risk of severe breathing problems in the infant.

Q: What is the official safety profile for Inalpin in individuals with kidney or liver function issues?

Regulatory labels advise that caution should be used when this medication is given to individuals with severe kidney or liver disease. This is due to the potential for altered drug clearance, which means the body may not process the drug correctly, leading to possible worsening of these conditions.

Q: Does the available research cover the long-term health outcomes for users of Inalpin?

Studies and official information indicate that this medication is intended and studied for short-term, acute episodes. Consequently, long-term health outcomes for users are generally not established by the available research. Regulatory caution focuses primarily on the known risks associated with long-term use, such as dependence.

Q: Is there any risk of becoming dependent on Inalpin with prolonged use?

Yes, the official Boxed Warning for this medication notes that because it contains an opioid, there is a risk for addiction, abuse, and physical dependence. This risk is notably higher when the medication is used for long periods.

Q: What does the term 'contraindication' mean on the Inalpin drug label?

According to regulatory guidance, a contraindication refers to a specific pre-existing condition or circumstance that makes the use of Inalpin potentially harmful. When a contraindication is present (such as severe asthma or taking certain other medications), the drug is determined to be inappropriate for use.

Q: What are the reasons Inalpin is not described as a 'cure' for the condition it treats?

Official product information indicates that Inalpin is a symptomatic reliever, not a cure. The drug is indicated to provide relief from coughing and to loosen mucus. It works by addressing these symptoms rather than solving the underlying medical condition.

Q: Can Inalpin affect a person's mood or general energy levels?

Official documents list potential side effects that include drowsiness, fatigue, and general weakness, which affect a person's energy level. Additionally, some regulatory patient information notes the possibility of mental or mood changes, such as confusion or hallucinations.

Q: Are there any known generic versions of Inalpin currently available?

The generic designation for this combination medication is typically listed as Codeine Phosphate/Guaifenesin Oral Solution. Specific formulations manufactured by different companies are maintained in official regulatory databases like DailyMed.

Q: Is it typical to experience mild nausea or a headache when first starting Inalpin?

Regulatory documents list headache and nausea/vomiting as common side effects associated with the drug. While the highest risk for serious breathing problems is often noted during the first 24 to 72 hours of treatment, official labels do not specify a typical timeline for the start or end of common side effects.

Q: Does Inalpin generally cause changes in body weight over time?

Regulatory sources concerning long-term opioid use, which includes the active ingredient codeine, have noted an association with risks like poor nutrition and weight loss. However, this medicine is intended for short-term use, and this risk is primarily associated with prolonged use.

Q: Does Inalpin interact with popular over-the-counter pain medications?

Official interaction warnings highlight the risks associated with combining Inalpin with other medications that cause central nervous system (CNS) depression. Furthermore, combining Inalpin with high doses of over-the-counter pain relievers containing ingredients like acetaminophen or aspirin can increase the risk of respiratory problems or organ damage.

Q: Does taking Inalpin interfere with the effectiveness of common herbal or vitamin supplements?

Regulatory documents state that specific herbal products may interact with the codeine component of Inalpin. These interactions are regulatory concerns that are typically addressed by a healthcare professional.

Q: Are there any specific foods or drinks mentioned in official guidance that should be avoided with Inalpin?

Regulatory patient information notes that grapefruit and grapefruit juice are substances that may be addressed by a healthcare provider regarding their consumption while using this medication. While the drug may be taken with or without food, this specific food item is noted due to potential interactions.

Q: Does the overall effectiveness of Inalpin decrease after using it for an extended time?

According to official documents, tolerance to this medication may develop with long-term use. The development of tolerance means the drug may become less effective over time. This can require higher doses to achieve the original level of symptom relief.

Q: Where can members of the public find information about the original clinical trials for Inalpin?

Official regulatory documents and patient guides often refer the public to authoritative sources for study information. Members of the public can typically find information on clinical studies and regulatory data through resources like the National Institutes of Health (NIH) Clinical Trials database or DailyMed.

Q: Are there any current studies or research programs looking into new potential uses for Inalpin?

Information regarding current clinical studies, including any research looking into new potential uses for the drug, is generally maintained by the National Institutes of Health. This data is publicly accessible through their clinical trials database.

Q: Why might a doctor request periodic blood tests for someone using Inalpin?

Regulatory information notes that Inalpin may affect the results of certain laboratory tests. Additionally, when the drug is used alongside specific medications, periodic monitoring may be necessary to manage potential risks.

Q: Why is Inalpin only approved for treating specific patient populations?

Regulatory bodies restrict the use of Inalpin to specific patient populations, primarily adults aged 18 and older. This restriction is due to the presence of the opioid component, codeine, which carries a high risk of serious events, including severe breathing problems, abuse, addiction, and overdose.

Q: What steps are described if someone accidentally uses more Inalpin than suggested?

Official guidelines describe the required steps in the event of accidental overuse. These steps include contacting emergency services (911) or a local Poison Control Center. Signs of a potential overdose include slow or shallow breathing, confusion, cold/clammy skin, or loss of consciousness.

Q: Can people with a known history of heart problems use Inalpin?

Risk information notes that individuals with certain pre-existing heart problems may need to use this medication with caution or avoid it entirely. Specific examples of these conditions include an irregular heartbeat or severe hypotension (low blood pressure).

Q: How is Inalpin's safety profile described for patients who have previously had allergic reactions to other medicines?

Regulatory documents reference the importance of disclosing any known allergies to the active ingredients (codeine or guaifenesin) or any other medications. This precaution helps healthcare providers assess the risk of cross-reactivity or other allergic responses.

How should Inalpin be stored and disposed of?

How to Store and Dispose of Inalpin?

The storage and disposal of Inalpin (Codeine and Guaifenesin Oral Liquid) are strictly defined by regulatory requirements due to the inclusion of Codeine, a controlled substance.

Official Storage Conditions

Storage Requirement Official Guidance
Temperature Store at Controlled Room Temperature (20^circ to 25 C / 68^circ to 77 F).
Protection Keep the container tightly closed and protect the liquid from light.
Security Must be kept out of the sight and reach of children in a secure location.

Disposal of Unused Medicine

Unused or expired Inalpin must be disposed of immediately via a drug take-back program or a DEA-authorized collector. Disposal must strictly follow official guidance for controlled substances to prevent accidental ingestion, misuse, or environmental contamination. It is mandated to keep the product secure until it is properly discarded.

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

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