Gardasil

Indications

• Antiseptic treatment
• Antifungal treatment
• Management of minor burns and cuts
• Treatment of eye infections (as boric acid solution)

Dosage

Children: Refer to the BNF for Children for specific guidance on pediatric dosing.

Adults: Refer to specific product guidelines, as dosing can vary based on formulation and indication.

Mechanism of action

Borate compounds, such as boric acid, exhibit their effects primarily through the disruption of bacterial and fungal cell membrane integrity. They can interfere with the metabolism of microorganisms, leading to their death. Additionally, borates have anti-inflammatory properties, which may contribute to their therapeutic effects.

Pharmacodynamics

The pharmacodynamics of borate compounds involve their ability to inhibit enzyme activity in microbial cells, leading to the disruption of essential metabolic processes. They also have a mild antiseptic effect, which can help in reducing inflammation and promoting healing in affected tissues.

Pharmacokinetics

The pharmacokinetics of borate compounds can vary depending on the specific formulation and route of administration. Generally, borates are poorly absorbed through the gastrointestinal tract when ingested, which limits systemic exposure. However, topical applications can lead to localized effects. Borate compounds are known to be excreted primarily through the kidneys.

Pregnancy

Borate should be used in pregnancy only if clearly needed, as its safety has not been established.

Breast-feeding

Caution is advised when borate is used during breastfeeding due to insufficient data on its excretion in human milk.

Storage

Store in a tightly closed container, protected from moisture.

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

• Rheumatoid arthritis
• Allergic diseases
• Ulcers
• Anemia

Dosage

Children: Refer to the BNF for Children for specific dosing recommendations.

Adults: Refer to the BNF for specific dosing guidelines.

Mechanism of action

The exact actions of supplemental L-histidine are not fully understood, but it is postulated to have immunomodulatory and antioxidant properties. It serves as the precursor for histamine, which can enhance suppressor T cell activity and potentially down-regulate the production of reactive oxygen species in immune cells. This may confer benefits in conditions like rheumatoid arthritis, where oxidative stress is a concern.

Pharmacodynamics

L-histidine is abundant in hemoglobin and contributes to various bodily functions. It has been clinically associated with treating rheumatoid arthritis, allergic diseases, ulcers, and anemia. Deficiencies in L-histidine can lead to complications such as impaired hearing. Its metabolites, particularly histamine, exhibit immunomodulatory effects and antioxidant capabilities.

Pharmacokinetics

L-histidine is absorbed through the gastrointestinal tract, and its bioavailability can be influenced by dietary intake. Once ingested, it is incorporated into proteins and utilized in various metabolic pathways, including histidine biosynthesis and tRNA charging. The metabolism of L-histidine involves its conversion to histamine, which subsequently participates in numerous physiological processes.

Pregnancy

There is limited data on the use of L-histidine during pregnancy. Consult healthcare professionals.

Breast-feeding

Limited information is available on the excretion of L-histidine in human milk. Consult healthcare professionals before use.

Storage

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

Formulations

• L-histidine powder
• L-histidine capsules
• L-histidine tablets

Indications

• Prevention of cervical cancer
• Prevention of anal cancer
• Prevention of oropharyngeal cancer
• Prevention of genital warts

Dosage

Children: Refer to relevant guidelines for vaccination schedules and administration.

Adults: Refer to relevant guidelines for vaccination schedules and administration.

Mechanism of action

HPV infects epithelial cells and integrates its DNA into the host cell genome. The viral proteins E6 and E7 interfere with host cell cycle regulation, inhibiting tumor suppressor proteins p53 and retinoblastoma (Rb). This leads to uncontrolled cell proliferation and genomic instability, contributing to oncogenesis.

Pharmacodynamics

The immune response to HPV infection can lead to the elimination of the virus in some individuals, while others may develop persistent infections that can progress to dysplasia and cancer. The effectiveness of HPV vaccines is based on their ability to elicit a strong and lasting immune response against the virus, thus preventing the associated diseases.

Pharmacokinetics

HPV is not treated with conventional pharmacological agents, as it is a viral infection that requires preventive measures such as vaccination. The HPV vaccines are administered intramuscularly, leading to systemic circulation of the vaccine components, which stimulate an immune response. The half-life of antibodies generated in response to the vaccine is variable but generally lasts for several years, providing long-term protection.

Adverse effects

• Local reactions at the injection site
• Fever
• Headache
• Fatigue
• Nausea

Precautions

• Caution in patients with a history of allergic reactions to vaccine components
• Consider the risk of fainting after vaccination
• Monitor for any adverse reactions post-vaccination

Pregnancy

The safety of papillomavirus vaccines during pregnancy has not been established. Vaccination is generally not recommended during pregnancy unless the benefits outweigh the risks.

Breast-feeding

There is no evidence suggesting that papillomavirus vaccines pose a risk to breastfeeding infants. Vaccination can be considered.

Storage

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

Formulations

• Quadrivalent HPV vaccine (types 6, 11, 16, 18)
• Bivalent HPV vaccine (types 16, 18)
• Nonavalent HPV vaccine (types 6, 11, 16, 18, 31, 33, 45, 52, 58)

Indications

• Emulsifying agent in drug formulations
• Stabilizer for parenteral preparations
• Solubilizer for hydrophobic drug compounds
• Ingredient in topical formulations

Dosage

Children: Refer to specific product guidelines, as dosing varies based on formulation and intended use.

Adults: Refer to specific product guidelines, as dosing varies based on formulation and intended use.

Mechanism of action

Polysorbate functions primarily as an emulsifying agent. It reduces the surface tension between immiscible liquids, allowing them to mix more easily. This property is particularly useful in stabilizing emulsions and suspensions, facilitating the delivery of active pharmaceutical ingredients in various formulations.

Pharmacodynamics

Polysorbate does not exert pharmacological effects in the traditional sense, as it does not bind to specific receptors to elicit a physiological response. Instead, it plays a crucial role in modifying the physical properties of drug formulations, thereby enhancing drug delivery and absorption. Its ability to solubilize drugs enhances their bioavailability, particularly for poorly soluble compounds.

Pharmacokinetics

Polysorbate is generally considered to be non-toxic and is not absorbed to a significant extent when administered orally. It is metabolized by the liver and excreted primarily through the gastrointestinal tract. The pharmacokinetic profile may vary depending on the route of administration and the specific formulation in which it is used.

Adverse effects

• Allergic reactions
• Skin irritation
• Gastrointestinal disturbances

Precautions

• Use cautiously in patients with known allergies to polysorbates or related compounds
• Monitor for allergic reactions in susceptible individuals

Pregnancy

Polysorbate is generally considered safe for use during pregnancy, but consult with a healthcare provider for specific cases.

Breast-feeding

Polysorbate is considered safe during breastfeeding, but consult with a healthcare provider for individual advice.

Storage

Store at room temperature, away from direct sunlight and moisture.

Formulations

• Polysorbate 20
• Polysorbate 80

Indications

• Nutritional supplementation
• Muscle repair and growth
• Immune support
• Enzyme replacement therapy
• Hormonal regulation

Dosage

Children: Refer to specific product guidelines for dosing information, as protein requirements in children vary based on age, growth stage, and health status.

Adults: Refer to specific product guidelines for dosing information, as protein requirements can vary widely based on individual needs, activity levels, and clinical conditions.

Mechanism of action

Proteins exert their effects primarily through their structure and interactions with other molecules. They can function as enzymes, hormones, and antibodies, and their action is often mediated by binding to specific receptors or substrates, leading to a change in cellular activity or function. For example, enzymes catalyze biochemical reactions, while antibodies bind to antigens to facilitate immune responses.

Pharmacodynamics

The pharmacodynamics of proteins can vary significantly depending on the specific protein being considered. Generally, the effects of proteins are dose-dependent and influenced by their concentration, affinity for targets, and duration of action. Proteins can have a wide range of biological activities, including promoting cellular repair, regulating metabolism, and modulating immune responses.

Pharmacokinetics

The pharmacokinetics of proteins includes their absorption, distribution, metabolism, and excretion (ADME). Proteins are typically digested in the gastrointestinal tract into amino acids before being absorbed into the bloodstream. Once in circulation, proteins can be distributed throughout various tissues. They may have a variable half-life based on their structure and function, and they are primarily metabolized by the liver and excreted via the kidneys. The pharmacokinetic profile can be influenced by factors such as the route of administration and the presence of other substances.

Pregnancy

Generally considered safe, but high protein intake should be monitored to avoid potential risks.

Breast-feeding

Adequate protein intake is critical for lactating women to support milk production and quality.

Storage

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

Mechanism of action

Since the actions of supplemental L-histidine are unclear, any postulated mechanism is entirely speculative. However, some facts are known about L-histidine and some of its metabolites, such as histamine and trans-urocanic acid, which suggest that supplemental L-histidine may one day be shown to have immunomodulatory and/or antioxidant activities. Low free histidine has been found in the serum of some rheumatoid arthritis patients. Serum concentrations of other amino acids have been found to be normal in these patients. L-histidine is an excellent chelating agent for such metals as copper, iron and zinc. Copper and iron participate in a reaction (Fenton reaction) that generates potent reactive oxygen species that could be destructive to tissues, including joints. L-histidine is the obligate precursor of histamine, which is produced via the decarboxylation of the amino acid. In experimental animals, tissue histamine levels increase as the amount of dietary L-histidine increases. It is likely that this would be the case in humans as well. Histamine is known to possess immunomodulatory and antioxidant activity. Suppressor T cells have H2 receptors, and histamine activates them. Promotion of suppressor T cell activity could be beneficial in rheumatoid arthritis. Further, histamine has been shown to down-regulate the production of reactive oxygen species in phagocytic cells, such as monocytes, by binding to the H2 receptors on these cells. Decreased reactive oxygen species production by phagocytes could play antioxidant, anti-inflammatory and immunomodulatory roles in such diseases as rheumatoid arthritis. This latter mechanism is the rationale for the use of histamine itself in several clinical trials studying histamine for the treatment of certain types of cancer and viral diseases. In these trials, down-regulation by histamine of reactive oxygen species formation appears to inhibit the suppression of natural killer (NK) cells and cytotoxic T lymphocytes, allowing these cells to be more effective in attacking cancer cells and virally infected cells.

Pharmacodynamics

Is found abundantly in hemoglobin; has been used in the treatment of rheumatoid arthritis, allergic diseases, ulcers and anemia. A deficiency can cause poor hearing.