DR. X MEDICATED SOAP

Dosage

Children: Refer to specific drug information for detailed dosage recommendations.

Adults: Refer to specific drug information for detailed dosage recommendations.

Mechanism of action

The mechanism of action varies depending on the specific drug that 'contains' certain active ingredients. Each compound will have its own unique pharmacological pathway and target within the body, which can include receptor modulation, enzyme inhibition, or other biochemical interactions.

Pharmacodynamics

Pharmacodynamics will depend on the active ingredients in the formulation. It generally encompasses the biochemical and physiological effects of the drug and its mechanisms of action, including the relationship between drug concentration and effect.

Pharmacokinetics

Pharmacokinetics involves the absorption, distribution, metabolism, and excretion of the specific active ingredients within the formulation. This can vary significantly based on the drug's chemical properties, route of administration, and individual patient factors.

Pregnancy

Consult with a healthcare provider before use, as safety during pregnancy has not been established.

Breast-feeding

Consult with a healthcare provider before use, as it is not known if this drug is excreted in human milk.

Storage

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

Indications

• Monitoring respiratory function
• Assessment of metabolic status
• Management of respiratory acidosis
• Management of respiratory alkalosis

Dosage

Children: Dosing for interventions related to carbon dioxide levels in pediatric patients should be guided by clinical protocols and the BNF for Children.

Adults: Dosing for interventions related to carbon dioxide levels is typically based on clinical assessment and individual patient needs. Refer to clinical guidelines for specific scenarios.

Mechanism of action

Carbon dioxide acts primarily as a signaling molecule in the body, influencing respiratory drive and blood pH. It is produced during cellular respiration and is a critical component of the bicarbonate buffering system, which helps maintain acid-base homeostasis. Elevated levels of CO2 in the blood stimulate ventilation in the lungs, increasing the rate of gas exchange and facilitating the removal of excess CO2.

Pharmacodynamics

The pharmacodynamic effects of dioxides, particularly carbon dioxide, are closely related to its concentration in the blood. As CO2 levels increase, it leads to respiratory acidosis, which can stimulate the respiratory centers in the brain to increase ventilation. Conversely, low levels of CO2 can cause respiratory alkalosis, potentially leading to decreased respiratory drive. CO2 also plays a role in vasodilation and can affect blood flow and pressure through its influence on smooth muscle tone.

Pharmacokinetics

Carbon dioxide is produced endogenously during metabolic processes and is transported in the bloodstream primarily in three forms: dissolved in plasma, as bicarbonate ions (HCO3-), and bound to hemoglobin. The half-life of CO2 in the bloodstream is very short due to its rapid exchange with alveolar gas in the lungs. The elimination of CO2 occurs through exhalation, making it a dynamic component of respiratory physiology.

Pregnancy

Data on the effects of dioxide during pregnancy are limited. Caution is advised due to potential risks associated with exposure.

Breast-feeding

Limited data are available regarding the excretion of dioxide in human milk. Caution is recommended.

Storage

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

Indications

• Lead poisoning
• Zinc toxicity
• Cadmium poisoning
• Iron overload disorders

Dosage

Adults: Refer to the BNF for specific dosing recommendations for adults, as it may vary based on the condition being treated and the severity of metal poisoning.

Mechanism of action

The pharmacologic effects of edetate calcium disodium are due to the formation of chelates with divalent and trivalent metals. A stable chelate forms with any metal that can displace calcium from the molecule, which includes lead, zinc, cadmium, and iron. The excretion of zinc is significantly increased, while the effect on calcium excretion is minimal. The chelation process helps to reduce the toxicity of heavy metals in the body by promoting their urinary excretion.

Pharmacodynamics

Edetate calcium acts as a heavy metal chelating agent, forming stable, water-soluble complexes with metal ions that can be excreted in urine. One gram of edetate calcium can theoretically bind up to 620 mg of lead, though actual urinary excretion rates are lower, with approximately 5 mg of lead excreted per gram of EDTA in lead-poisoned patients. It is relatively ineffective against mercury, gold, or arsenic poisoning but can mobilize and eliminate zinc, cadmium, copper, iron, and manganese.

Pharmacokinetics

After intravenous administration, edetate calcium disodium is rapidly distributed in the blood and has a half-life that can vary based on the patient's condition and the presence of heavy metals. The drug is primarily excreted unchanged in the urine. Calcium levels may be transiently lowered during infusion, but significant mobilization of body calcium stores is usually not observed unless very slow infusions are administered. The effects on metal ion excretion are dose-dependent and vary according to the specific metal involved.

Contra-indications

• Hypersensitivity to edetate calcium disodium or any component of the formulation
• Pre-existing renal impairment
• Calcium deficiency states

Adverse effects

• Hypocalcemia
• Renal impairment
• Gastrointestinal disturbances such as nausea and vomiting
• Headache
• Hypotension
• Electrolyte imbalances

Interactions

• Increased risk of toxicity when used with nephrotoxic agents
• May interfere with the absorption of certain minerals and vitamins
• Should not be mixed with other intravenous drugs due to potential chemical interactions

Precautions

• Monitor renal function during treatment
• Use caution in patients with cardiovascular disease due to potential hypotensive effects
• Evaluate calcium levels periodically in patients receiving prolonged therapy
• Use with caution in patients with a history of seizures

Pregnancy

Limited data available on the use of edetate calcium disodium in pregnant women. Use only if clearly needed.

Breast-feeding

It is not known whether edetate calcium disodium is excreted in human milk. Caution is advised.

Storage

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

Formulations

• Edetate calcium disodium injection

Dosage

Children: As with adults, dosing for children is highly variable and specific to the product used. It is advisable to refer to product guidelines and consult a healthcare professional.

Adults: Dosing varies widely based on the specific product and its intended use, with no standardized dosage for fragrance as it is generally applied topically or used in the environment.

Mechanism of action

Fragrances primarily act by stimulating the olfactory receptors in the nasal cavity, which send signals to the brain's olfactory bulb. This process is responsible for the perception of smell and can evoke emotional responses, enhance mood, and even influence behavior. The specific compounds in fragrances can interact with various biochemical pathways, but their exact mechanisms can vary widely depending on the individual components and their concentrations.

Pharmacodynamics

The pharmacodynamics of fragrance compounds can involve modulation of neurotransmitter activity in the brain, particularly those associated with mood and emotional responses. Certain fragrance compounds may have calming effects, potentially influencing the levels of stress hormones and promoting relaxation. However, responses can be highly subjective and vary from person to person.

Pharmacokinetics

The pharmacokinetics of fragrance components depend on their chemical nature. Many volatile aromatic compounds can be rapidly absorbed through the skin or inhaled, leading to quick onset of effects. Metabolism may occur in the liver, and elimination can happen through urine or exhalation. The half-lives of these compounds can vary significantly based on their structure and the route of exposure.

Adverse effects

• Allergic reactions
• Skin irritation
• Respiratory issues
• Headaches
• Nausea

Precautions

• Use with caution in individuals with known allergies
• Avoid use in those with respiratory conditions like asthma
• Patch testing recommended prior to widespread use on skin

Pregnancy

Fragrance use during pregnancy should be limited, as some ingredients may pose risks to fetal development.

Breast-feeding

Generally considered safe, but caution is advised due to potential for skin absorption and transfer to infant.

Storage

Store in a cool, dry place away from direct sunlight, tightly sealed to prevent evaporation.

Formulations

• Perfumes
• Colognes
• Body sprays
• Scented lotions
• Candles
• Essential oils

Indications

• Constipation
• Preparation for surgical or diagnostic procedures involving the rectum
• Decreasing intraocular pressure in certain ocular conditions

Dosage

Children: For children aged 2 to 6 years, 2 g to 5 g of glycerin may be used as a suppository. Children aged 6 to 12 years may use 5 g to 10 g as needed. For specific pediatric dosing, please refer to the BNF for Children.

Adults: For rectal use, 4 g to 10 g of glycerin may be administered as a suppository as needed.

Mechanism of action

When administered rectally, glycerin draws water from the tissues into the feces due to its hygroscopic action, which reflexively stimulates bowel evacuation. Additionally, glycerin creates an osmotic gradient that leads to a decrease in intraocular pressure by facilitating fluid movement from the aqueous and vitreous humors into the bloodstream.

Pharmacodynamics

Glycerin is classified as an osmotic laxative, which acts to retain water in the fecal matter, softening stools and making them easier to pass. Its local irritant effects also contribute to its laxative properties. Glycerin suppositories typically produce a bowel movement within 15 to 30 minutes of administration.

Pharmacokinetics

Glycerin is readily absorbed from the gastrointestinal tract when taken orally and is metabolized primarily in the liver. It is distributed widely throughout the body, with excretion occurring primarily via the kidneys. The onset of action for glycerin when used as a laxative is relatively quick, particularly when used rectally.

Contra-indications

• Severe dehydration
• Severe renal impairment
• Intestinal obstruction
• Appendicitis

Adverse effects

• Abdominal cramps
• Diarrhea
• Nausea
• Vomiting
• Electrolyte imbalance

Interactions

• May enhance the effects of other laxatives
• Caution with concurrent use of diuretics due to potential electrolyte imbalance

Precautions

• Use with caution in patients with renal impairment
• Monitor electrolytes in patients with prolonged use
• Not recommended for long-term use

Pregnancy

Glycerin is generally considered safe during pregnancy but should be used under medical advice.

Breast-feeding

Glycerin is excreted in breast milk in small amounts and is considered safe for use while breastfeeding.

Storage

Store at room temperature, away from moisture and heat.

Formulations

• Glycerin suppositories
• Glycerin oral solution

Indications

• Pain management
• Inflammatory conditions
• Arthritis
• Musculoskeletal disorders

Dosage

Children: Refer to the BNF for Children for appropriate paediatric dosing recommendations.

Adults: Refer to prescribing information for specific dosage guidelines, as doses may vary based on the condition being treated and patient response.

Mechanism of action

Kernelate works by inhibiting the synthesis of prostaglandins, which are compounds involved in the inflammatory response. It may also target specific enzymes associated with pain pathways, leading to reduced inflammation and relief from pain.

Pharmacodynamics

The pharmacodynamics of Kernelate involves its ability to modulate inflammatory mediators and pain perception. By inhibiting the cyclooxygenase (COX) enzymes, it reduces the production of prostaglandins, which are responsible for inducing pain, fever, and inflammation. This results in decreased symptoms associated with inflammatory conditions.

Pharmacokinetics

Kernelate is absorbed rapidly from the gastrointestinal tract, with peak plasma concentrations occurring within a few hours after administration. The drug undergoes hepatic metabolism, and its metabolites are primarily excreted via the urine. Its half-life can vary depending on individual patient factors, including age and liver function.

Pregnancy

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

Breast-feeding

Caution is advised as it is not known if this drug is excreted in breast milk.

Storage

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

Indications

• Antiseptic for skin disinfection
• Disinfectant for surfaces
• Preventing infection in minor cuts and abrasions

Dosage

Children: For children, consult the BNF for Children for appropriate dosing guidelines based on age and condition.

Adults: For external use, apply as needed to affected areas. Follow specific product instructions for concentration and frequency of application.

Mechanism of action

As a phenol antiseptic, chloroxylenol's hydroxyl -OH groups bind to specific proteins on bacterial cell membranes, disrupting the membrane integrity. This disruption allows the bacterial cell contents to leak, facilitating chloroxylenol's penetration into the cell where it can further interact with proteins and enzymes, impairing cellular function. At high concentrations, chloroxylenol coagulates proteins and nucleic acids within the bacterial cell, leading to rapid cell death.

Pharmacodynamics

Chloroxylenol is a substituted phenol known for its bactericidal activity at low concentrations against a variety of bacteria. Its mechanism involves disrupting bacterial cell membranes and interfering with cellular functions, resulting in the death of susceptible organisms.

Pregnancy

There is limited data on the use of chloroxylenol during pregnancy. Caution is advised.

Breast-feeding

Caution is advised as the effects on nursing infants are not well-studied.

Storage

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

Formulations

• Chloroxylenol topical solution
• Chloroxylenol cream
• Chloroxylenol antiseptic wipes

Dosage

Children: Refer to dietary guidelines and individual nutritional needs.

Adults: Refer to dietary guidelines and individual nutritional needs.

Mechanism of action

Palmate is metabolized in the body to produce energy through beta-oxidation in the mitochondria. It serves as a primary source of fatty acids for lipid metabolism and is integrated into various cellular structures, influencing membrane fluidity and signaling pathways. It also plays a role in the synthesis of triglycerides and phospholipids.

Pharmacodynamics

The pharmacodynamic effects of palmate are primarily related to its role in energy metabolism. It influences the synthesis and breakdown of lipids, which can impact cholesterol levels, insulin sensitivity, and overall metabolic health. Additionally, palmate can affect gene expression related to lipid metabolism and energy homeostasis.

Pharmacokinetics

Palmate is absorbed in the gastrointestinal tract as part of dietary fats. It is transported in the bloodstream bound to albumin and is taken up by various tissues for metabolism. The half-life of palmitic acid varies depending on dietary intake and metabolic demand. It is predominantly metabolized in the liver and muscle tissues, with products eventually excreted as carbon dioxide and water.

Pregnancy

The effects of palmate during pregnancy have not been extensively studied. It is important to consult a healthcare professional before use.

Breast-feeding

Limited information is available regarding the safety of palmate during breastfeeding. Consult a healthcare professional prior to use.

Storage

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

Indications

• General hand hygiene
• Personal cleanliness
• Infection control and prevention
• Preparation for surgical procedures

Dosage

Children: For children, wet hands, apply a small amount of soap, lather while singing a song for at least 20 seconds, and rinse thoroughly with water. Adjust the quantity based on the child's age and hand size.

Adults: For hand hygiene, wet hands, apply a sufficient amount of soap, lather for at least 20 seconds, and rinse thoroughly with water.

Mechanism of action

Soap operates primarily through the mechanism of emulsification. The amphiphilic structure of soap molecules allows them to interact with both water and oil. The hydrophobic tails of soap molecules attach to grease and dirt, while the hydrophilic heads remain in the aqueous environment, allowing the dirt to be washed away with water.

Pharmacodynamics

Soap does not have pharmacodynamic effects in the conventional sense as it is not absorbed into the body for systemic action. Instead, its effectiveness is based on its ability to disrupt the lipid membranes of microorganisms, leading to cell lysis and removal of pathogens from the skin surface during washing.

Pharmacokinetics

Soap is not absorbed systemically; therefore, pharmacokinetic parameters such as absorption, distribution, metabolism, and excretion do not apply. Its action is localized to the skin and surfaces where it is applied, facilitating the physical removal of contaminants through rinsing with water.

Pregnancy

Soap is generally considered safe for use during pregnancy. It is important to choose gentle, non-irritating formulations to avoid skin sensitivity.

Breast-feeding

Soap is safe for use while breastfeeding. Care should be taken to use mild products that do not irritate the skin, especially around the breast area.

Storage

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

Formulations

• Bar soap
• Liquid soap
• Foam soap
• Antibacterial soap
• Moisturizing soap

Dosage

Children: Refer to relevant safety guidelines, as specific dosing information for clinical use is not provided in the BNF.

Adults: Refer to relevant safety guidelines, as specific dosing information for clinical use is not provided in the BNF.

Mechanism of action

Tetrachloride is a non-polar solvent that dissolves a wide range of organic compounds. It disrupts cellular membranes and can interfere with metabolic processes by forming reactive intermediates, leading to cellular damage. The mechanism may also involve the induction of oxidative stress and mitochondrial dysfunction.

Pharmacodynamics

The pharmacodynamic effects of tetrachloride are primarily linked to its role as a solvent and its cytotoxic properties. It can cause cellular damage, particularly in the liver, through lipid peroxidation and disruption of cellular integrity. Its effects may vary based on exposure duration, concentration, and route of administration, leading to acute or chronic toxicity.

Pharmacokinetics

Tetrachloride is absorbed through the respiratory tract, gastrointestinal tract, and skin. Once in the bloodstream, it distributes widely throughout body tissues, particularly in adipose tissue and the liver, where it undergoes biotransformation via cytochrome P450 enzymes. The elimination half-life can vary, but it is primarily excreted through the urine as metabolites. Accumulation may occur with prolonged exposure, leading to increased toxicity.

Pregnancy

There is insufficient data on the safety of tetrachloride in pregnancy. Caution is advised.

Breast-feeding

Caution is advised as the effects on nursing infants are not well-studied.

Storage

Store in a cool, dry place away from direct sunlight and heat sources. Keep in tightly closed containers.

Dosage

Children: Refer to specific drug information for paediatric dosing guidelines, as this will depend on the active compound and its therapeutic use.

Adults: Refer to specific drug information for adult dosing guidelines, as this will depend on the active compound and its therapeutic use.

Mechanism of action

The mechanism of action will depend on the specific active compound that is in the tetrahydrate form. Generally, tetrahydrates can improve the bioavailability of a drug by facilitating its dissolution in bodily fluids, which can enhance absorption in the gastrointestinal tract.

Pharmacodynamics

Pharmacodynamics will vary based on the specific drug in the tetrahydrate form. However, it generally involves the interaction of the drug with specific receptors or enzymes in the body, influencing physiological and biochemical processes. Tetrahydrate forms may affect the pharmacokinetics of the drug, altering its efficacy and safety profile.

Pharmacokinetics

Pharmacokinetics of a tetrahydrate form will depend on the parent compound. Typically, factors such as absorption, distribution, metabolism, and excretion can be influenced by the hydration state of the drug. Hydrates may have different solubility and stability profiles, which can impact the rate and extent of drug absorption.

Dosage

Children: Refer to specific guidelines or clinical recommendations for appropriate dosing.

Adults: Refer to specific guidelines or clinical recommendations for appropriate dosing.

Mechanism of action

Tetraphosphate acts as a phosphate donor in biochemical reactions, participating in the transfer of phosphate groups to other molecules. This mechanism is essential in the regulation of metabolic pathways and energy production within cells.

Pharmacodynamics

As a polyphosphate, tetraphosphate influences cellular processes by modulating the availability of phosphate. The compound is involved in energy metabolism, particularly in the synthesis and hydrolysis of ATP, and may also impact nucleic acid metabolism and signaling pathways that rely on phosphate.

Pharmacokinetics

The pharmacokinetics of tetraphosphate are not well-documented; however, it is generally assumed that, like other phosphate compounds, it may be absorbed and utilized in various tissues, with renal excretion being a likely route for elimination.

Indications

• pH stabilization in pharmaceutical formulations
• solubilization of poorly soluble drugs
• buffering agent in injectable preparations

Dosage

Children: Refer to specific product guidelines for paediatric dosing as it may vary based on formulation.

Adults: Refer to specific product guidelines for adult dosing as it may vary based on formulation.

Mechanism of action

Tetrasodium functions primarily as a buffering agent, helping to maintain the pH of pharmaceutical preparations. This stabilization is crucial in ensuring the solubility and bioavailability of active pharmaceutical ingredients, thereby enhancing their therapeutic effects.

Pharmacodynamics

The pharmacodynamic properties of tetrasodium relate to its ability to modulate pH levels in a solution. By maintaining optimal pH conditions, tetrasodium aids in preserving the stability and efficacy of various drugs, improving their overall therapeutic action.

Pharmacokinetics

Tetrasodium is generally not absorbed systemically when used in pharmaceutical formulations, as its primary role is localized within the preparation. Its pharmacokinetic profile is largely influenced by its solubility and stability in solution, which can affect the release and absorption of the active ingredients it is combined with.

Indications

• Orthopedic implants
• Dental implants
• Prosthetic devices
• Surgical instruments

Mechanism of action

Titanium does not have a specific mechanism of action as it is not a drug in the traditional sense. Instead, its biocompatibility allows it to integrate with biological tissues without eliciting significant immune responses, making it suitable for use in implants and prosthetic devices. The presence of titanium ions can influence biological processes, including cell proliferation and differentiation.

Pharmacodynamics

Titanium itself does not exhibit pharmacodynamics as it is not administered as a drug. Its interactions within biological systems are primarily mechanical and structural, providing support and stability in orthopedic and dental applications. The biocompatibility of titanium allows for favorable tissue integration and reduced rejection rates compared to other materials.

Pharmacokinetics

As titanium is not a pharmacological agent, traditional pharmacokinetic parameters such as absorption, distribution, metabolism, and excretion do not apply. Titanium is typically utilized in solid forms, such as implants, where it remains localized and does not undergo metabolism or systemic circulation.

Pregnancy

There is limited data on the use of titanium during pregnancy. Consult a healthcare professional before use.

Breast-feeding

There is limited data on the excretion of titanium in breast milk. Consult a healthcare professional before use.

Storage

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

Indications

• Dehydration
• Electrolyte imbalance
• Hydration therapy

Dosage

Children: Refer to the BNF for Children for specific guidance on hydration and fluid requirements in paediatric patients.

Adults: The dosage of water varies according to individual needs, typically based on factors such as age, sex, weight, and activity level. The general recommendation is to consume adequate fluids to maintain hydration, often estimated at approximately 2.5 liters per day for adults, including all sources of fluid intake.

Mechanism of action

Water functions primarily as a solvent, enabling the dissolution and transport of various solutes within biological systems. It participates in hydrolysis reactions, where it contributes to the breakdown of complex molecules, and is involved in thermoregulation and metabolic processes.

Pharmacodynamics

Water is essential for maintaining cellular turgor and function. It regulates osmotic balance and is involved in enzymatic reactions as a reactant or product. The presence of water influences the structure and function of biomolecules, impacting enzymatic activity and metabolic pathways.

Pharmacokinetics

Water is absorbed primarily in the gastrointestinal tract, with rapid distribution throughout the body. Its elimination occurs through urine, sweat, and respiration, with the rate of loss influenced by environmental factors and physiological conditions. The body maintains water balance through mechanisms involving thirst and hormonal regulation.

Pregnancy

Water is essential for life and is considered safe during pregnancy. Adequate hydration is crucial for maternal health and fetal development.

Breast-feeding

Water is safe for breastfeeding mothers and is vital for maintaining hydration while nursing.

Storage

Store in a cool, dry place. Ensure that the container is clean and free from contaminants.

Mechanism of action

The pharmacologic effects of edetate calcium disodium are due to the formation of chelates with divalent and trivalent metals. A stable chelate will form with any metal that has the ability to displace calcium from the molecule, a feature shared by lead, zinc, cadmium, manganese, iron and mercury. The amounts of manganese and iron metabolized are not significant. Copper is not mobilized and mercury is unavailable for chelation because it is too tightly bound to body ligands or it is stored in inaccessible body compartments. The excretion of calcium by the body is not increased following intravenous administration of edetate calcium disodium, but the excretion of zinc is considerably increased. Effects on rat liver glucocorticoid receptor in vitro was studied. At 4 °C, 10 mmole EDTA had a stablizing effect on unbound hepatic glucocorticoid receptors. Apparently, endogenous metal ions are involved in the processes of glucocorticoid-receptor complex stabilization and transformation. Edetate disodium injection forms chelates with the cations of calcium and many divalent and trivalent metals. Because of its affinity for calcium, edetate disodium will produce a lowering of the serum calcium level during intravenous infusion. Slow infusion over a protracted period may cause mobilization of extracirculatory calcium stores. Edetate disodium exerts a negative inotropic effect upon the heart. Edetate disodium likewise forms chelates with other polyvalent metals and produces increases in urinary excretion of magnesium, zinc and other trace elements. It does not form a chelate with potassium but may reduce the serum level and increase urinary loss of potassium.

Pharmacodynamics

Edetate calcium is a heavy metal chelating agent. The calcium in edetate calcium can be displaced by divalent or trivalent metals to form a stable water soluble complex that can be excreted in the urine. In theory, 1 g of edetate calcium can theoretically bind 620 mg of lead, but in reality only about 5 mg per gram is actually excreted into the urine in lead poisoned patients. In addition to chelating lead, edetate calcium also chelates and eliminates zinc from the body. Edetate calcium also binds cadmium, copper, iron and manganese, but to a much lesser extent than either lead or zinc. Edetate calcium is relatively ineffective for use in treating mercury, gold or arsenic poisoning.

Mechanism of action

When administered rectally, glycerin exerts a hygroscopic and/or local irritant action, drawing water from the tissues into the feces and reflexively stimulating evacuation. Glycerin decreases intraocular pressure by creating an osmotic gradient between the blood and intraocular fluid, causing fluid to move out of the aqueous and vitreous humors into the bloodstream. Glycerin (glycerol) and sorbitol are hyperosmotic laxatives. When administered rectally, glycerin and sorbitol exert a hygroscopic and/or local irritant action, drawing water from the tissues into the feces and reflexly stimulating evacuation. The extent to which the simple physical distention of the rectum and the hygroscopic and/or local irritant actions are responsible for the laxative effects of some of these drugs is not known. Only extremely high oral doses of sorbitol (25 g daily) or glycerin exert laxative action. /Glycerin/ decreases intraocular pressure by creating an osmotic gradient between the blood and intraocular fluid, causing fluid to move out of the aqueous and vitreous humors into the bloodstream. The physicochemical effects of a series of alkanols, alkanediols and glycerol on erythrocyte shape and hemolysis at 4 and 20 degrees C were examined. We calculated the dielectric constant of the incubation medium, Ds, and the dielectric constant of the erythrocyte membrane Dm in the presence of organic solutes. The ratio Ds/Dm = -38.48 at 20 degrees C defines the normal biconcave shape in a medium without hemolytic agents. A decrease in Ds/Dm favors externalization or internalization with consequent hemolysis. Alkanols and alkanediols convert biconcave erythrocytes into echinocytes, which is accompanied by an increase in the projected surface area. Glycerol converts biconcave erythrocytes into stomatocytes, which was accompanied by a marginal decrease in the projected surface area. Progressive externalization in alkanols and alkanediols or internalization in glycerol resulted in a decrease in the projected surface area and the formation of smooth spheres. The degree of shape change induced was related to the degree of hemolysis and the ratio Ds/Dm. A decrease in temperature reduced both the degree of shape change and hemolysis. .../Thus/ physicochemical toxicity may be a result of a temperature dependent hydrophobic interaction between the organic solutes and the membrane and is best interpreted by the ability of the solutes to change Ds and Dm.

Pharmacodynamics

Glycerin is commonly classified as an osmotic laxative but may act additionally or alternatively through its local irritant effects; it may also have lubricating and fecal softening actions. Glycerin suppositories usually work within 15 to 30 minutes.

Mechanism of action

As a phenol antiseptic, it is believed that the hydroxyl -OH groups of the chloroxylenol molecule binds to certain proteins on the cell membrane of bacteria, and disrupts the membrane so as to allow the contents of the bacterial cell to leak out. This allows chloroxylenol to enter the bacterial cell to bind further with more proteins and enzymes to disable the cell's functioning. At particularly high concentrations of chloroxylenol, the protein and nucleic acid content of targeted bacterial cells become coagulated and cease to function, leading to rapid cell death.

Pharmacodynamics

Chloroxylenol is a substituted phenol which has been widely used for many years as an ingredient of antiseptic and disinfectant products intended for external use. It is known to be bactericidal in low concentration to a wide range of Gram positive and Gram negative bacteria.