POLIOMYELITIS VACCINE (VERO CELL) INACTIVATED, SABIN STRAINS, 0.5ML

Indications

• Constipation
• Irritable bowel syndrome (IBS)
• Diverticulosis
• Cholesterol management
• Hemorrhoids

Dosage

Children: Refer to the BNF for Children for dosing recommendations in pediatric patients, as dosages depend on age, weight, and clinical indications.

Adults: Refer to the BNF for specific dosing guidelines for adult patients, as doses may vary based on the specific bulk agent used and the clinical condition being treated.

Mechanism of action

Bulks work primarily by absorbing water in the gastrointestinal tract, leading to an increase in stool volume. This distension of the bowel triggers peristalsis, enhancing the movement of the intestines and facilitating easier passage of stool. The fibrous content also helps to regulate bowel function by normalizing stool consistency.

Pharmacodynamics

The pharmacodynamic properties of bulks involve their ability to swell and form a gel-like substance when mixed with water. This gel increases stool bulk and promotes peristalsis, thereby reducing constipation. Additionally, bulks can help manage diarrhea by absorbing excess fluid in the intestines, effectively normalizing bowel function. However, their onset of action may vary depending on the specific type of bulk agent used.

Pharmacokinetics

Bulks are not absorbed systemically; they exert their effects locally within the gastrointestinal tract. The absorption of water and electrolytes occurs in the intestines, and the fibers are fermented to a limited extent by colonic bacteria, which can produce short-chain fatty acids. The transit time through the gastrointestinal tract can vary depending on dietary factors and individual gastrointestinal motility, but typically, the effects are observed within 12 to 72 hours after intake.

Pregnancy

There is limited data on the use of bulking agents during pregnancy. Consultation with a healthcare professional is recommended before use.

Breast-feeding

Bulking agents are generally considered safe during breastfeeding, but consultation with a healthcare professional is advised.

Storage

Store in a cool, dry place away from direct sunlight and moisture. Keep out of reach of children.

Indications

• Hepatitis A
• Hepatitis B
• Influenza
• Polio
• Rabies
• Typhoid fever

Dosage

Children: Refer to specific product guidelines for paediatric dosing, as it varies by vaccine type and indication.

Adults: Refer to specific product guidelines for adult dosing, as it varies by vaccine type and indication.

Mechanism of action

Inactivated vaccines work by introducing a form of the pathogen that cannot cause disease into the body. This stimulates the immune system to produce antibodies and memory cells specific to the pathogen, allowing for a robust immune response upon future exposure. The immune system recognizes the inactivated pathogen as foreign, leading to the activation of T-cells and B-cells, which are crucial for long-term immunity.

Pharmacodynamics

The pharmacodynamics of inactivated vaccines involve the generation of an adaptive immune response. After vaccination, the body produces specific antibodies against the inactivated pathogen. The response typically includes both humoral immunity, characterized by antibody production, and cellular immunity, involving T-cell activation. The duration of immunity can vary, and booster doses may be required to maintain adequate protection.

Pharmacokinetics

Inactivated vaccines do not have a pharmacokinetic profile like traditional drugs since they do not enter systemic circulation in the same manner. Following administration, the vaccine components are taken up by antigen-presenting cells, which process and present the antigens to T-cells. The immune response is initiated locally at the site of injection and can be influenced by factors such as the route of administration and the presence of adjuvants that enhance the immune response.

Adverse effects

• Injection site reactions (pain, swelling, redness)
• Fever
• Fatigue
• Headache
• Myalgia
• Chills

Precautions

• Assess for allergies to vaccine components
• Monitor for allergic reactions post-administration
• Consider underlying health conditions that may affect immune response

Pregnancy

Inactivated vaccines are generally considered safe during pregnancy, but individual risk-benefit assessment is recommended.

Breast-feeding

Inactivated vaccines can be administered during breastfeeding without concern for adverse effects in the infant.

Storage

Store in a refrigerator at 2°C to 8°C. Do not freeze.

Formulations

• Inactivated viral vaccines
• Inactivated bacterial vaccines

Indications

• Prevention of specific infectious diseases caused by a single strain of a pathogen
• Vaccination campaigns targeting specific outbreaks
• Routine immunization programs

Dosage

Children: Refer to specific vaccine guidelines for paediatric dosing based on the vaccine used.

Adults: Refer to specific vaccine guidelines for adult dosing based on the vaccine used.

Mechanism of action

Monovalent vaccines work by introducing a harmless component of a pathogen, such as an inactivated virus, live attenuated virus, or a subunit of the pathogen, into the body. This exposure stimulates the immune system to recognize and mount a response against the specific pathogen strain, leading to the production of neutralizing antibodies and memory cells that provide long-term immunity.

Pharmacodynamics

The pharmacodynamics of monovalent vaccines involve the activation of the adaptive immune system. Upon administration, dendritic cells present antigens from the vaccine to T cells, which then help stimulate B cells to produce antibodies. This process also generates memory T and B cells that enable a rapid and robust immune response upon subsequent exposure to the pathogen.

Pharmacokinetics

As vaccines, monovalent formulations do not have traditional pharmacokinetic profiles, as they do not follow the same absorption, distribution, metabolism, and excretion pathways typical of pharmaceutical drugs. Instead, their efficacy is influenced by factors like the route of administration (intramuscular, subcutaneous), vaccine stability, and the immune response of the individual receiving the vaccine.

Pregnancy

Monovalent vaccines are generally considered safe during pregnancy; however, it is important to consult a healthcare professional for specific recommendations based on the type of vaccine and individual circumstances.

Breast-feeding

Monovalent vaccines can typically be administered during breastfeeding without any special precautions; consult a healthcare professional for personalized advice.

Storage

Store monovalent vaccines according to the manufacturer's guidelines, usually in a refrigerator at temperatures between 2°C and 8°C. Protect from light and do not freeze.

Formulations

• Inactivated monovalent vaccine
• Live attenuated monovalent vaccine

Indications

• Prevention of poliomyelitis infection
• Vaccination in children and high-risk populations

Dosage

Children: Refer to the BNF for Children for specific dosages and recommendations for vaccination schedules.

Adults: Refer to specific vaccination guidelines for adults, as dosages may vary based on risk factors and prior vaccination history.

Mechanism of action

Poliovirus enters the body through the oral route, replicating in the oropharynx and gastrointestinal tract before spreading to the central nervous system via the bloodstream. Once inside the CNS, the virus selectively infects motor neurons in the anterior horn of the spinal cord, leading to cell lysis and resulting in muscle weakness or paralysis. The immune response to the virus contributes to inflammation and further neuronal damage.

Pharmacodynamics

The poliovirus's pathogenicity is primarily due to its ability to evade the host's immune response and its selective neurotropism. The destruction of motor neurons leads to flaccid paralysis, with recovery possible in some cases as the motor neurons may regenerate. The severity of the disease correlates with the extent of neuronal involvement, which can vary widely among individuals.

Pharmacokinetics

Poliovirus is an RNA virus that does not undergo traditional pharmacokinetic processes as it is not treated with drugs. Instead, the prevention of polio relies on vaccination strategies. The inactivated poliovirus vaccine (IPV) and the oral poliovirus vaccine (OPV) are used to induce immunity. After administration, the vaccines promote the development of antibodies against the virus without causing disease.

Contra-indications

• Hypersensitivity to the vaccine component
• Severe immunodeficiency
• Acute febrile illness

Adverse effects

• Pain at injection site
• Fever
• Fatigue
• Headache
• Nausea
• Allergic reactions

Interactions

• Immunosuppressive therapies may reduce vaccine efficacy
• Concomitant administration with other vaccines may affect immune response

Precautions

• Use with caution in individuals with moderate to severe acute illness
• Consider history of allergic reactions
• Monitor for signs of anaphylaxis after administration

Pregnancy

Poliomyelitis vaccination is generally considered safe during pregnancy, but consult a healthcare professional.

Breast-feeding

The vaccine is considered safe for breastfeeding mothers.

Storage

Store at 2 to 8 degrees Celsius. Do not freeze. Protect from light.

Formulations

• Inactivated poliovirus vaccine (IPV)
• Oral poliovirus vaccine (OPV)

Dosage

Children: Refer to specific drug formulations and product labels as purified substances can vary widely in their use and dosing.

Adults: Refer to specific drug formulations and product labels as purified substances can vary widely in their use and dosing.

Mechanism of action

The mechanism of action for purified compounds varies widely depending on the specific substance. Generally, purified drugs exert their effects by interacting with specific biological targets, such as receptors, enzymes, or ion channels, leading to a desired therapeutic effect. This interaction can involve binding to receptors to activate or inhibit signaling pathways, modulating enzymatic activity, or altering physiological processes.

Pharmacodynamics

Pharmacodynamics describes the effects of a drug on the body and the relationship between drug concentration and effect. For purified drugs, this can involve dose-response relationships and the time course of their action. The purified form often enhances potency and reduces variability in response among patients, which can lead to more predictable therapeutic outcomes. The overall effect is determined by the drug's affinity for its target, the efficacy of the drug-receptor interaction, and the downstream signaling pathways activated as a result of this interaction.

Pharmacokinetics

Pharmacokinetics involves the absorption, distribution, metabolism, and excretion (ADME) of a drug. For purified substances, absorption can be more efficient due to the absence of impurities that may affect solubility or stability. Distribution may also be enhanced, leading to higher bioavailability. Metabolism can be influenced by the structure of the purified compound, as it may be metabolized more readily by liver enzymes. Excretion typically occurs through the kidneys or liver, depending on the molecular characteristics of the purified drug.

Pregnancy

Consult with a healthcare professional, as the safety of purified forms of medications during pregnancy may vary depending on the specific substance.

Breast-feeding

Consult with a healthcare professional, as the safety of purified forms of medications during breastfeeding may vary depending on the specific substance.

Storage

Store in a cool, dry place, away from light and moisture, and keep out of reach of children.

Indications

• Prevention of poliomyelitis
• Post-exposure prophylaxis in outbreak situations

Dosage

Children: Refer to local guidelines for dosing recommendations, as specific dosing may vary based on regional vaccination programs.

Adults: Refer to local guidelines for dosing recommendations, as specific dosing may vary based on regional vaccination programs.

Mechanism of action

The Sabin vaccine contains live attenuated strains of the poliovirus, which stimulate an immune response without causing disease. After administration, the vaccine replicates in the intestine, leading to the production of immunoglobulin A (IgA) in the gut and immunoglobulin G (IgG) in the bloodstream. This response provides both local and systemic immunity against poliovirus infection.

Pharmacodynamics

The Sabin vaccine effectively induces active immunity by promoting the production of neutralizing antibodies against all three serotypes of poliovirus. This immune response helps prevent the virus from replicating and spreading within the host and contributes to herd immunity, reducing the overall incidence of poliomyelitis in the community.

Pharmacokinetics

Following oral administration, the attenuated virus replicates in the gut, leading to viral shedding in the stool. The immune response develops over several weeks, with peak antibody levels typically occurring within 4 to 6 weeks. The duration of immunity is long-lasting, although booster doses may be required in certain populations to maintain adequate immunity.

Pregnancy

Safety during pregnancy has not been established. Use only if the benefits outweigh the risks.

Breast-feeding

Caution is advised as it is unknown whether it is excreted in breast milk.

Storage

Store in a cool, dry place away from light.

Indications

• Muscle strain
• Tendon strain
• Acute pain management
• Inflammation control

Dosage

Children: Refer to specific medication guidelines as dosing varies by drug used for pain management.

Adults: Refer to specific medication guidelines as dosing varies by drug used for pain management.

Mechanism of action

The mechanism of injury in strains involves the disruption of muscle fibers or tendons due to excessive tension or force. This can lead to inflammation, pain, and impaired function. Inflammatory mediators are released at the site of injury, resulting in local vasodilation, increased permeability of blood vessels, and recruitment of immune cells which contribute to the healing process.

Pharmacodynamics

The pharmacodynamics of treating strains often involve the use of analgesics and anti-inflammatory medications, which work by inhibiting cyclooxygenase (COX) enzymes, leading to decreased production of prostaglandins. This reduces pain and inflammation associated with muscle or tendon injury. Physical therapy may also play a significant role in enhancing recovery and restoring function.

Pharmacokinetics

The pharmacokinetics of medications used for strains, such as NSAIDs, vary depending on the specific drug. Generally, these agents are absorbed rapidly from the gastrointestinal tract, peak in plasma concentration within a few hours, and have a half-life that varies widely. Metabolism typically occurs in the liver, and excretion is primarily via the kidneys. Individual responses can vary based on age, weight, and overall health.

Pregnancy

Consult healthcare provider before use.

Breast-feeding

Consult healthcare provider before use.

Storage

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

Indications

• Prevention of infectious diseases such as measles, mumps, rubella, hepatitis B, influenza, and human papillomavirus (HPV)
• Travel vaccinations for diseases endemic to certain regions
• Vaccination for at-risk populations, such as those with compromised immune systems or specific occupational exposures

Dosage

Children: Dosage varies by vaccine type and age; refer to the BNF for Children for specific dosing information.

Adults: Dosage varies by vaccine type and indication; refer to specific guidelines for each vaccine.

Mechanism of action

Vaccines work by mimicking an infection. They introduce a harmless component of a pathogen (antigen) to the immune system, prompting the body to produce an immune response. This includes the generation of antibodies and memory cells that provide long-term immunity. Upon subsequent exposure to the actual pathogen, the immune system is primed to respond more rapidly and effectively.

Pharmacodynamics

The pharmacodynamics of vaccines involves the activation of both humoral and cellular immunity. Vaccines stimulate B cells to produce antibodies against the pathogen, while T cells are activated to destroy infected cells. This dual response helps to establish immunological memory, which enables a faster and more robust response upon re-exposure to the pathogen.

Pharmacokinetics

Vaccines are administered via various routes, including intramuscular, subcutaneous, and oral. After administration, the antigens are presented to antigen-presenting cells, which activate T cells and stimulate B cell proliferation and differentiation. The half-life of vaccine-induced immunity varies depending on the type of vaccine, with some providing lifelong immunity and others requiring booster doses to maintain protection.

Contra-indications

• Severe allergic reaction (anaphylaxis) to a component of the vaccine
• Severe immunocompromised state for live attenuated vaccines

Adverse effects

• Local reactions at the injection site (pain, redness, swelling)
• Fever
• Fatigue
• Headache
• Muscle pain
• Joint pain
• Nausea

Interactions

• Immunosuppressive medications may reduce vaccine efficacy
• Concurrent administration of some vaccines may require spacing to optimize immune response

Precautions

• History of allergic reactions to vaccines or vaccine components
• Pregnancy (specific vaccines may be contraindicated)
• Moderate to severe acute illness with or without fever

Pregnancy

Consult healthcare provider. Some vaccines are contraindicated during pregnancy, while others are recommended.

Breast-feeding

Generally considered safe, but consult healthcare provider regarding specific vaccines.

Storage

Store in a refrigerator at 2-8°C. Do not freeze. Protect from light.

Formulations

• Liquid suspension for injection
• Lyophilized powder for reconstitution