EUCARBON

Indications

• Constipation
• Palliative care for bowel cleansing

Dosage

Children: Child 1 month–3 years: 3.75–15 mg once daily, adjusted according to response. Child 4–17 years: 3.75–30 mg once daily, adjusted according to response.

Adults: 7.5–15 mg once daily (max. per dose 30 mg daily), typically taken at bedtime. The initial dose should be low and increased gradually as needed, with higher doses prescribed under medical supervision.

Mechanism of action

Senna contains sennosides, which are metabolized in the colon to form active compounds that stimulate the peristaltic movement of the intestines. This promotes bowel evacuation by increasing the contraction of intestinal muscles and enhancing fluid secretion into the bowel, leading to softer stools.

Pharmacodynamics

The pharmacodynamic effect of senna includes increased intestinal motility and secretion of electrolytes and water into the intestines, resulting in softened stools and facilitation of bowel movements. Side effects may include abdominal cramps and gastrointestinal disturbances, as well as potential skin reactions.

Pharmacokinetics

Senna is not absorbed significantly in the gastrointestinal tract; its active metabolites exert their effects locally in the intestines. The onset of action is typically within 6 to 12 hours when taken orally. Metabolism occurs in the gut, and excretion is primarily via feces, with minimal systemic absorption.

Contra-indications

• Acute abdominal conditions
• Acute inflammatory bowel disease
• Intestinal obstruction
• Severe dehydration

Adverse effects

• Abdominal cramps
• Asthenia
• Gastrointestinal disorders
• Skin reactions
• Urine discolouration

Precautions

• Excessive use of stimulant laxatives can cause diarrhea and related effects such as hypokalaemia
• Local irritation - avoid prolonged contact with skin (incontinent patients or infants wearing nappies, risk of irritation and excoriation)
• Rodent studies indicate potential carcinogenic risk

Pregnancy

Manufacturers advise to avoid - limited information available.

Breast-feeding

Manufacturers advise to avoid - no information available.

Storage

Store at room temperature, away from moisture and heat.

Formulations

• Oral suspension
• Tablets
• Syrup
• Suppositories

Indications

• Acute poisoning
• Drug overdose
• Gastrointestinal decontamination
• Treatment of certain types of toxin ingestion

Dosage

Children: For children over 1 year of age, the recommended dosage of activated charcoal is 1 gram per kilogram of body weight, up to a maximum of 50 grams. For children under 1 year, consult the BNF for Children for specific dosing guidance.

Adults: The usual adult dosage for activated charcoal in the treatment of poisoning is 50 to 100 grams, administered orally or via a nasogastric tube. Repeat doses may be given in certain cases, depending on the toxin involved.

Mechanism of action

Activated charcoal works primarily by adsorbing toxins and drugs in the gastrointestinal tract, reducing their systemic absorption. The extensive surface area and porous structure of activated charcoal allow it to bind various substances through van der Waals forces and hydrogen bonding. This binding action helps to prevent the absorption of harmful substances into the bloodstream, facilitating their elimination from the body.

Pharmacodynamics

The efficacy of activated charcoal is related to its ability to adsorb a wide range of substances, including many pharmaceuticals and poisons. The effectiveness can vary depending on the specific substance, the timing of administration, and the dose of activated charcoal. It is generally most effective when administered soon after ingestion of the toxin.

Pharmacokinetics

Activated charcoal is not absorbed systemically; it acts locally within the gastrointestinal tract. After administration, it passes through the gastrointestinal system and is eventually excreted in the feces. The adsorption capacity of activated charcoal is influenced by factors such as the surface area, particle size, and the nature of the toxin to which it is exposed.

Contra-indications

• Intestinal obstruction
• Gastrointestinal perforation
• Severe constipation

Adverse effects

• Gastrointestinal disturbances such as nausea and vomiting
• Constipation
• Black stools
• Aspiration pneumonia if inhaled

Interactions

• May reduce the absorption of certain medications, including anticoagulants, anticonvulsants, and others
• Should not be given simultaneously with other oral medications

Precautions

• Use with caution in patients with a history of gastrointestinal disorders
• Ensure airway protection in unconscious or compromised patients to prevent aspiration
• Monitor for potential electrolyte imbalances

Pregnancy

Charcoal is generally considered safe during pregnancy, but should only be used when necessary and under medical supervision.

Breast-feeding

Charcoal is unlikely to adversely affect a nursing infant, but should be used with caution.

Storage

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

Formulations

• Activated charcoal tablets
• Activated charcoal powder
• Activated charcoal suspension

Indications

• General wellness support
• Anti-inflammatory effects
• Antioxidant activity
• Digestive aid
• Support for immune function

Dosage

Children: Paediatric dosing should be determined based on the specific extract and its intended use. Consultation with a healthcare provider is recommended for accurate dosing.

Adults: Dosage varies widely depending on the specific extract and formulation. It is essential to follow the manufacturer's instructions or consult a healthcare professional for appropriate dosing.

Mechanism of action

The mechanism of action of herbal extracts can vary significantly based on their constituents. Commonly, they exert their effects through multiple pathways including modulation of neurotransmitter systems, interference with inflammatory processes, or direct antioxidant activity. Some extracts may activate certain receptors or inhibit enzymes related to disease processes.

Pharmacodynamics

The pharmacodynamics of extracts is complex due to the presence of multiple active compounds which can have synergistic or antagonistic effects. These compounds may influence cellular signaling pathways, alter gene expression, or modulate immune response. The overall pharmacological profile is determined by the specific composition of the extract, its concentration, and the biological target it interacts with.

Pharmacokinetics

The pharmacokinetics of extracts involves absorption, distribution, metabolism, and excretion of the active compounds. Generally, herbal extracts are absorbed in the gastrointestinal tract, with bioavailability influenced by factors such as formulation, the presence of food, and individual metabolic differences. Compounds may undergo hepatic metabolism, and elimination can occur through urine or feces, depending on their chemical nature.

Pregnancy

Consult a healthcare professional before use, as the safety of the extract during pregnancy has not been established.

Breast-feeding

Consult a healthcare professional before use, as the safety of the extract during breastfeeding has not been established.

Storage

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

Indications

• Prevention and treatment of folate deficiency
• Megaloblastic anemia due to folate deficiency
• Supplementation during pregnancy to prevent neural tube defects
• Hyperhomocysteinemia

Dosage

Children: Refer to the BNF for Children for appropriate dosing guidelines in paediatric populations.

Adults: Refer to specific guidelines for the treatment of folate deficiency and supplementation, as dosages may vary based on the clinical scenario.

Mechanism of action

Folic acid acts as a precursor to tetrahydrofolate, which is an essential coenzyme in the synthesis of nucleic acids and amino acids. It facilitates the transfer of one-carbon units in various metabolic pathways, including the synthesis of purines and pyrimidines necessary for DNA and RNA production.

Pharmacodynamics

Folic acid is involved in several key physiological processes, including the maturation of red blood cells, synthesis of neurotransmitters, and the prevention of neural tube defects during embryonic development. Adequate levels of folate are required to maintain homocysteine metabolism and prevent hyperhomocysteinemia, which is associated with cardiovascular diseases.

Pharmacokinetics

Folic acid is well absorbed from the gastrointestinal tract, with bioavailability ranging from 50% to 100%. It is primarily metabolized in the liver, where it is converted into active forms such as tetrahydrofolate. The elimination half-life of folic acid is short, necessitating regular dietary intake. Excess folate is typically excreted in the urine.

Contra-indications

• Hypersensitivity to folic acid or any component of the formulation
• Untreated vitamin B12 deficiency

Adverse effects

• Nausea
• Loss of appetite
• Bloating
• Abdominal cramps
• Diarrhea
• Allergic reactions
• Sleep disturbances

Interactions

• Anticonvulsants (e.g., phenytoin, phenobarbital) - may reduce the effectiveness of folic acid
• Methotrexate - folic acid may reduce the effectiveness of methotrexate in cancer therapy
• Chloramphenicol - may interfere with erythropoiesis

Precautions

• Use with caution in patients with a history of hypersensitivity
• Monitor patients with conditions that may require careful management of folate levels, such as kidney disease
• Assess for vitamin B12 deficiency before starting folic acid therapy

Pregnancy

Folic acid is essential during pregnancy to prevent neural tube defects and is often recommended as a supplement before conception and during the first trimester.

Breast-feeding

Folic acid is excreted in breast milk; supplementation is generally considered safe during breastfeeding.

Storage

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

Formulations

• Tablets
• Injectable solution
• Oral solution

Indications

• Constipation
• Irritable bowel syndrome
• Gastrointestinal disorders

Dosage

Children: Refer to established guidelines or consult a healthcare provider for appropriate dosing.

Adults: Refer to established guidelines or consult a healthcare provider for appropriate dosing.

Mechanism of action

Rhubarb exerts its laxative effects mainly through the stimulation of intestinal peristalsis. The anthraquinones, such as emodin and rhein, are believed to increase the secretion of fluids into the intestines, thereby softening stool and promoting bowel movements. These compounds may also have antimicrobial properties, contributing to gastrointestinal health.

Pharmacodynamics

The pharmacodynamic effects of rhubarb include increased gastrointestinal motility and enhanced secretion of intestinal fluids. These effects lead to softer stools and increased frequency of bowel movements. Additionally, rhubarb may exhibit anti-inflammatory and antimicrobial properties, which can contribute to its efficacy in treating certain gastrointestinal conditions.

Pharmacokinetics

Rhubarb is typically administered orally, with absorption occurring in the gastrointestinal tract. The onset of action can vary but usually occurs within 6 to 12 hours. The bioavailability of its active compounds can be influenced by factors such as gut microbiota. Metabolism and excretion primarily occur through the liver and kidneys, respectively.

Contra-indications

• Known hypersensitivity to rhubarb or its components
• Acute abdominal conditions
• Intestinal obstruction
• Severe dehydration
• Pregnancy

Adverse effects

• Abdominal cramps
• Diarrhea
• Nausea
• Vomiting
• Electrolyte imbalance
• Hypokalemia
• Renal impairment with prolonged use

Interactions

• May enhance the effects of diuretics, leading to increased risk of electrolyte imbalance
• Antacids may reduce the effectiveness of rhubarb
• Corticosteroids may have an increased risk of hypokalemia when used concurrently

Precautions

• Use with caution in patients with renal disease
• Monitor electrolytes in patients taking rhubarb for prolonged periods
• Not recommended for use in children without professional guidance

Pregnancy

Rhubarb is contraindicated during pregnancy due to potential uterine stimulation and risk of miscarriage.

Breast-feeding

Limited data available; use with caution and consult a healthcare provider.

Storage

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

Formulations

• Dried rhubarb root
• Rhubarb extract
• Rhubarb powder

Indications

• Nutritional support
• Dietary management of obesity
• Reduction of cardiovascular disease risk
• Support for digestive health
• Management of diabetes

Dosage

Children: Refer to age-appropriate dietary guidelines for vegetable intake, generally suggesting a range of 1 to 3 servings per day depending on age and nutritional requirements.

Adults: Incorporate a variety of vegetables into the daily diet, aiming for at least 5 servings per day, as recommended by dietary guidelines.

Mechanism of action

Vegetables contain a wide array of bioactive compounds, including vitamins (such as vitamin C and folate), minerals (such as potassium and magnesium), fiber, and phytochemicals (such as flavonoids and carotenoids). These compounds contribute to their health benefits through various mechanisms, including antioxidant activity, anti-inflammatory effects, and modulation of metabolic pathways. For example, fiber can enhance digestive health and help regulate blood sugar levels, while antioxidants can protect cells from oxidative stress.

Pharmacodynamics

The pharmacodynamics of vegetables is complex and varies widely depending on the specific type of vegetable and its constituents. Generally, the active components in vegetables can influence physiological processes such as inflammation, immune function, and cellular repair. For example, the high fiber content found in many vegetables promotes gastrointestinal health by enhancing bowel regularity and supporting a healthy gut microbiome.

Pharmacokinetics

The pharmacokinetics of vegetables are not typically defined in the same way as pharmaceuticals. However, the bioavailability of nutrients and phytochemicals found in vegetables can be influenced by factors such as preparation methods, digestion, and individual metabolic differences. Nutrients from vegetables are absorbed in the gastrointestinal tract and can be distributed throughout the body where they exert their effects.

Pregnancy

Vegetables are generally safe and recommended during pregnancy as they provide essential nutrients and fiber. However, certain vegetables should be washed thoroughly to reduce the risk of foodborne illness.

Breast-feeding

Vegetables are encouraged during breastfeeding due to their nutritional benefits. They can provide essential vitamins and minerals that support both maternal health and milk quality.

Storage

Store vegetables in a cool, dry place. Leafy greens should be kept in the refrigerator to maintain freshness. Most vegetables should be consumed within a few days of purchase for optimal nutrient retention.