V-IMMUNE

Dosage

Children: Refer to specific drug guidelines for paediatric dosing.

Adults: Refer to specific drug guidelines for adult dosing.

Mechanism of action

The mechanism of action varies depending on the specific drug being administered. Generally, drugs interact with specific receptors or enzymes in the body to elicit a therapeutic effect. This interaction can result in various downstream effects, including the modulation of physiological processes, alteration of biochemical pathways, or inhibition of pathological conditions.

Pharmacodynamics

Pharmacodynamics involves the study of how a drug affects the body, including the relationship between drug concentration and effect. It includes the drug's therapeutic effects, side effects, and the duration of action. Factors such as receptor affinity, intrinsic activity, and the presence of other substances can influence pharmacodynamic responses.

Pharmacokinetics

Pharmacokinetics is the study of how the body absorbs, distributes, metabolizes, and excretes a drug. Key parameters include bioavailability, volume of distribution, half-life, and clearance. The route of administration significantly impacts these parameters, influencing the onset, intensity, and duration of the drug's effects.

Adverse effects

• Nausea
• Vomiting
• Diarrhea
• Abdominal pain
• Headache
• Dizziness
• Fatigue

Precautions

• Use with caution in patients with gastrointestinal disorders
• Monitor for dehydration in patients with significant vomiting or diarrhea
• Assess for potential interactions with other medications

Pregnancy

Use during pregnancy only if clearly needed, as safety has not been established.

Breast-feeding

Consult a healthcare provider before use, as it may be excreted in breast milk.

Storage

Store in a cool, dry place away from direct sunlight.

Dosage

Children: Dosage for human-derived biological products in pediatrics should be determined based on specific product guidelines and the clinical context.

Adults: Dosage for human-derived biological products varies widely. Refer to specific product information for appropriate dosing.

Mechanism of action

Human physiology is governed by complex biological systems involving various cellular and molecular pathways. The mechanisms of action for human-derived biological products vary widely depending on the specific context, including immune response, hormonal regulation, and metabolic processes.

Pharmacodynamics

Pharmacodynamics in humans involves the interaction of drugs with biological systems, resulting in therapeutic effects. This includes receptor binding, signal transduction, and physiological responses. The effects are influenced by genetic factors, existing health conditions, and concurrent medications.

Pharmacokinetics

Pharmacokinetics in humans involves the absorption, distribution, metabolism, and excretion (ADME) of substances. Factors such as age, sex, body weight, and organ function can significantly influence these processes. Drug absorption may occur via oral, intravenous, or other routes, while distribution depends on blood flow and tissue permeability. Metabolism typically occurs in the liver, and excretion primarily takes place through the kidneys.

Pregnancy

There is no specific information available; consult local guidelines.

Breast-feeding

There is no specific information available; consult local guidelines.

Storage

Store in a cool, dry place away from direct sunlight.

Indications

• Primary immunodeficiency disorders
• Secondary immunodeficiency (e.g. due to HIV infection)
• Chronic inflammatory demyelinating polyneuropathy (CIDP)
• Immune thrombocytopenic purpura (ITP)
• Kawasaki disease
• Prevention of infections in at-risk populations (e.g. following bone marrow transplant)

Dosage

Children: Refer to the BNF for Children for age-appropriate dosing guidelines; specific doses depend on the clinical condition and patient age.

Adults: Refer to specific guidelines for dosing based on indication; typically varies based on clinical scenario and patient condition.

Mechanism of action

Immunoglobulin exerts its effects primarily through the neutralization of pathogens and toxins, opsonization, and the activation of the complement system. It modulates immune responses by influencing the activity of various immune cells, including B cells, T cells, and macrophages, thereby enhancing antibody production and regulating inflammation.

Pharmacodynamics

The pharmacodynamics of immunoglobulin involve its ability to bind to specific antigens, effectively neutralizing them and facilitating their clearance. It also plays a crucial role in modulating the immune response, providing immediate passive immunity and promoting the establishment of active immunity over time. The diverse mechanisms through which immunoglobulin operates include antibody-dependent cell-mediated cytotoxicity (ADCC) and inhibition of pro-inflammatory cytokines.

Pharmacokinetics

Immunoglobulin is typically administered intravenously or subcutaneously. After administration, it is distributed throughout the extracellular space. The half-life of immunoglobulin varies but is generally in the range of 21 to 30 days, depending on the specific formulation and the patient's individual characteristics. It is primarily eliminated through the reticuloendothelial system, with catabolism occurring in various tissues.

Contra-indications

• Hypersensitivity to immunoglobulin preparations
• Selective IgA deficiency with a history of hypersensitivity
• Severe hyperprolinemia

Adverse effects

• Headache
• Nausea
• Fever
• Chills
• Fatigue
• Rash
• Anaphylactic reactions
• Thromboembolic events

Interactions

• Live attenuated vaccines may be less effective if administered concurrently with immunoglobulin therapy
• Caution is advised when administering with other blood products

Precautions

• Monitor for signs of anaphylaxis during and after administration
• Use with caution in patients with renal impairment
• Hydrate adequately to prevent renal dysfunction
• Consider the risk of thrombosis in patients with a history of thromboembolic events

Pregnancy

Immunoglobulin can be used during pregnancy if indicated, as it is considered safe based on available data.

Breast-feeding

Immunoglobulin is excreted in breast milk, but is generally considered safe during breastfeeding.

Storage

Store at 2-8 degrees Celsius. Do not freeze. Protect from light. Use before expiry date.

Formulations

• Intravenous immunoglobulin (IVIG)
• Subcutaneous immunoglobulin (SCIG)
• Intramuscular immunoglobulin (IMIG)

Indications

• Dehydration
• Electrolyte imbalances
• Infections requiring immediate antibiotic therapy
• Pain management in acute settings
• Nutritional support in patients unable to eat
• Chemotherapy administration
• Anesthesia induction and maintenance

Dosage

Children: Refer to the specific drug's prescribing information in the BNF for Children for appropriate dosing guidelines.

Adults: Refer to the specific drug's prescribing information in the BNF for appropriate dosing guidelines.

Mechanism of action

The mechanism of action for intravenous drugs depends on the specific medication administered. Generally, intravenous administration allows for rapid drug distribution throughout the body, achieving high plasma concentrations quickly. This is particularly beneficial for medications that require immediate therapeutic effects.

Pharmacodynamics

Pharmacodynamics varies based on the specific drug administered intravenously. In general, drugs delivered via IV can achieve peak plasma concentrations faster than those taken orally, leading to quicker onset of action. This route is often utilized for drugs that are poorly absorbed in the gastrointestinal tract or for those that require precise titration to achieve the desired therapeutic effect.

Pharmacokinetics

Pharmacokinetics for intravenous drugs typically includes immediate bioavailability since the drug is delivered directly into circulation. Distribution is rapid, and elimination depends on the drug's specific metabolic pathways. Volume of distribution, clearance rates, and half-life can significantly vary based on the drug's properties and patient factors such as age, body weight, and organ function.

Interactions

• ataluren + intravenous aminoglycosides: Severe (increases risk of nephrotoxicity)
• intravenous dantrolene + calcium channel blockers: Severe (increases risk of acute hyperkalaemia and cardiovascular collapse)
• intravenous dantrolene + diltiazem: Severe (increases risk of acute hyperkalaemia and cardiovascular collapse)
• intravenous dantrolene + verapamil: Severe (increases risk of acute hyperkalaemia and cardiovascular collapse)
• intravenous chloramphenicol + antiepileptics: Moderate (increases concentration)
• intravenous chloramphenicol + fosphenytoin: Moderate (increases concentration)
• intravenous chloramphenicol + phenytoin: Moderate (increases concentration)
• miconazole + intravenous benzodiazepines: Moderate (increases exposure)
• intravenous magnesium + calcium channel blockers: Unknown (increases risk of hypotension)
• intravenous magnesium + amlodipine: Unknown (increases risk of hypotension)

Indications

• Primary immunodeficiency syndromes
• Secondary immunodeficiency
• Immunomodulation in certain autoimmune disorders
• Prevention of infections in patients undergoing immunosuppressive therapy

Dosage

Children: Refer to the BNF for Children for specific dosing recommendations in pediatric patients, as it varies based on age, weight, and clinical condition.

Adults: Refer to the BNF for specific dosing recommendations for adults, as it varies based on clinical indications and patient circumstances.

Mechanism of action

Normal immunoglobulin works by providing a broad spectrum of antibodies that neutralize pathogens and enhance the immune response. These antibodies bind to pathogens, facilitating their removal by immune cells and providing immediate passive immunity against infections.

Pharmacodynamics

The pharmacodynamic effects of normal immunoglobulin include the neutralization of toxins and pathogens, opsonization, and enhancement of phagocytosis. It modulates immune responses and provides immediate humoral immunity, particularly in individuals with inadequate antibody production.

Pharmacokinetics

Normal immunoglobulin is administered intravenously or subcutaneously. After administration, it is distributed throughout the body, with a half-life of approximately 21 to 30 days. It is metabolized by the reticuloendothelial system, and the rate of clearance can vary based on individual patient factors and the presence of underlying conditions.

Interactions

• normal immunoglobulin + monoclonal antibodies: Severe (affects effects)
• normal immunoglobulin + dinutuximab: Severe (affects effects)
• normal immunoglobulin + live vaccines, measles, mumps and rubella vaccine, live, rotavirus vaccine, typhoid vaccine, oral, varicella-zoster vaccine: Unknown (decreases efficacy)
• normal immunoglobulin + bacillus Calmette-Guérin vaccine: Unknown (decreases efficacy)
• normal immunoglobulin + herpes-zoster vaccine: Unknown (decreases efficacy)
• normal immunoglobulin + live: Unknown (decreases efficacy)
• normal immunoglobulin + influenza vaccine, live: Unknown (decreases efficacy)

Pregnancy

Consult relevant guidelines for use in pregnancy.

Breast-feeding

Consult relevant guidelines for use during breastfeeding.

Storage

Store at 2-8°C. Do not freeze.