Influvac

Dosage

Children: Refer to specific drug information for appropriate dosing.

Adults: Refer to specific drug information for appropriate dosing.

Indications

• Prevention of influenza virus infection
• Reduction of the severity of influenza illness
• Protection for high-risk groups against influenza complications

Dosage

Children: Refer to the BNF for Children for specific dosing recommendations for paediatric patients based on age and health status.

Adults: Refer to the BNF for specific dosing recommendations for adult patients based on the type of vaccine and individual health status.

Mechanism of action

Influenza vaccines stimulate the immune system to produce antibodies against the influenza virus. When the body is exposed to the virus, these antibodies help to prevent infection or mitigate the severity of the disease. The vaccines may contain inactivated virus or live attenuated virus, depending on the formulation.

Pharmacodynamics

Upon administration of the influenza vaccine, the immune system recognizes the viral antigens and generates a specific immune response. This response includes the production of antibodies, primarily immunoglobulin G (IgG), which can neutralize the virus and prevent its replication. The response varies based on individual health status and age.

Pharmacokinetics

The pharmacokinetics of influenza vaccines vary by type. After intramuscular or subcutaneous administration, the vaccine components are absorbed into the systemic circulation, leading to the production of antibodies. Peak antibody levels typically occur within 2 to 4 weeks after vaccination. The half-life of antibodies can vary, but they generally persist for several months, providing immunity against future infections.

Interactions

• normal immunoglobulin + influenza vaccine live: Unknown (decreases efficacy)

Pregnancy

Influenza vaccination is recommended during pregnancy, especially in the second and third trimesters, as it protects both mother and fetus.

Breast-feeding

Influenza vaccination is safe during breastfeeding and provides passive immunity to the infant.

Storage

Influenza vaccines should be stored in a refrigerator at 2 to 8 degrees Celsius. Do not freeze.

Indications

• Major depressive disorder
• Generalized anxiety disorder
• Obsessive-compulsive disorder
• Panic disorder

Dosage

Children: Refer to the BNF for Children for specific paediatric dosing information.

Adults: Refer to the BNF for specific dosing guidelines.

Mechanism of action

Like works by selectively inhibiting the reuptake of serotonin (5-HT) in the presynaptic neurons, leading to an increase in serotonin levels in the synaptic cleft. This increase enhances serotonergic neurotransmission, which is thought to contribute to its antidepressant and anxiolytic effects.

Pharmacodynamics

The pharmacodynamic effects of Like include increased levels of serotonin in the central nervous system, which improves mood, reduces anxiety, and alleviates symptoms of depression. The onset of therapeutic effects may take several weeks, as the drug facilitates neuronal adaptation and changes in receptor sensitivity over time.

Pharmacokinetics

Like is absorbed well from the gastrointestinal tract, with peak plasma concentrations typically occurring within 4 to 6 hours post-dose. It is extensively metabolized in the liver, primarily by cytochrome P450 enzymes, and has a half-life that allows for once-daily dosing in most cases. Excretion occurs mainly via urine, with metabolites being eliminated in both urine and feces.

Pregnancy

Data on the use of this drug in pregnancy is limited. Its use should be carefully considered against potential risks.

Breast-feeding

Caution is advised when using this drug during breastfeeding. It is recommended to assess the benefits and risks before use.

Storage

Store in a cool, dry place away from direct sunlight. Ensure it is kept out of reach of children.

Dosage

Children: Refer to the specific drug formulation for dosage in micrograms for pediatric patients, as it varies based on the medication and the child's weight or age.

Adults: Refer to the specific drug formulation for dosage in micrograms, as it varies based on the medication being administered.

Pregnancy

Consult healthcare provider for use during pregnancy as safety has not been established.

Breast-feeding

Consult healthcare provider prior to use while breastfeeding.

Storage

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

Dosage

Children: Refer to specific medication guidelines as Phuket is not a recognized drug.

Adults: Refer to specific medication guidelines as Phuket is not a recognized drug.

Pregnancy

Data on the use of phuket during pregnancy is not well-established. It is advisable to consult a healthcare provider before use.

Breast-feeding

The effects of phuket during breastfeeding are not clearly documented. Caution is recommended, and consultation with a healthcare provider is advised.

Storage

Store at room temperature, away from moisture and direct light. Keep out of reach of children.

Indications

• Bacterial infections
• Viral infections
• Epidemiological studies
• Antibiotic resistance monitoring

Dosage

Children: Refer to specific antimicrobial treatment guidelines based on the strain identified and the infection site.

Adults: Refer to specific antimicrobial treatment guidelines based on the strain identified and the infection site.

Mechanism of action

The mechanism of action for a strain depends on the type of microorganism it represents. For pathogenic bacteria, the strain may produce toxins, evade the host's immune response, or possess resistance mechanisms that allow it to survive in the presence of antibiotics. For viruses, strains may exhibit mutations that alter their ability to infect host cells or evade antiviral therapies.

Pharmacodynamics

Pharmacodynamics in the context of strains involves the interaction between the strain and the host's immune system, as well as the effects of specific antimicrobial agents on the strain. These interactions can influence the efficacy of treatments and the development of resistance.

Pharmacokinetics

Pharmacokinetics is not directly applicable to strains themselves but rather to the drugs used to treat infections caused by specific strains. Factors such as absorption, distribution, metabolism, and excretion of antimicrobial agents can vary depending on the strain's characteristics and the site of infection.

Pregnancy

There is limited information on the safety of strain in pregnancy. It is advisable to consult healthcare professionals for guidance.

Breast-feeding

Safety during breastfeeding is not well established. It is recommended to seek medical advice before use.

Storage

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

Indications

• Topical treatment of skin conditions
• Emulsifying agents in pharmaceutical formulations
• Wound healing applications
• Delivery of poorly soluble drugs

Dosage

Children: Refer to specific product guidelines and BNF for appropriate dosing regimens.

Adults: Refer to specific product guidelines and BNF for appropriate dosing regimens.

Mechanism of action

Surface-active agents, or surfactants, lower the surface tension between two substances, such as between a liquid and a solid or between two liquids. This property enables them to spread easily and improve the solubility of drugs in various formulations. In the context of drug delivery, surfactants can facilitate the absorption of medications across biological membranes by disrupting lipid bilayers, thus enhancing bioavailability.

Pharmacodynamics

Pharmacodynamics refers to the effects of drugs on the body and their mechanisms of action. For surface-active agents, the pharmacodynamic properties include their ability to alter surface tension and enhance wetting, spreading, and emulsification. These properties allow for improved penetration of active ingredients into tissues and can enhance the therapeutic effects of topically applied drugs.

Pharmacokinetics

Pharmacokinetics involves the absorption, distribution, metabolism, and excretion (ADME) of drugs. Surface-active agents typically exhibit limited systemic absorption when applied topically, leading to localized effects. The rate of absorption can be influenced by the formulation, the presence of other excipients, and the condition of the skin or mucosal surface. Metabolism may occur to a minimal extent, and excretion primarily happens through the skin or via the lymphatic system.

Pregnancy

Consult healthcare professional before use.

Breast-feeding

Consult healthcare professional before use.

Storage

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

Indications

• Influenza
• HIV/AIDS
• Hepatitis B and C
• Herpes simplex virus infections
• Cytomegalovirus infections
• COVID-19
• Respiratory syncytial virus infections

Dosage

Children: Refer to specific antiviral agents for dosing guidance.

Adults: Refer to specific antiviral agents for dosing guidance.

Mechanism of action

Viruses infect host cells by attaching to specific receptors on the cell surface. Once inside, they hijack the host cell's machinery to replicate their genetic material and produce viral proteins. New viral particles are assembled and released from the host cell, often destroying the cell in the process. The specific mechanism can vary depending on the virus type, including integration into the host genome in retroviruses or utilizing specific pathways for replication.

Pharmacodynamics

The pharmacodynamics of antiviral agents depend on the specific virus and the mechanism of action. Antiviral drugs may inhibit viral entry into host cells, block viral replication, or prevent the assembly of new virions. The effectiveness of antiviral therapy often relates to the stage of viral replication and the immune response of the host.

Pharmacokinetics

Pharmacokinetics of antiviral drugs varies widely based on the specific medication used. Generally, antiviral agents are absorbed through the gastrointestinal tract and distributed throughout the body. They may undergo hepatic metabolism and are often excreted through the kidneys. The half-life of these drugs can range from a few hours to several days, influencing dosing schedules.