CHILDRENS GEES ABOUT 150MCG ANHYDROUS MORPHINE IN 5ML LINCTUS

Indications

Mechanism of action

Morphine and its metabolites act as agonists at the mu and kappa opioid receptors. The mu-opioid receptor is responsible for morphine's analgesic effects and its action on the reward pathway in the brain, primarily affecting the ventral tegmental area. Morphine-6-glucuronide, a major metabolite, is responsible for a significant portion of morphine's analgesic effect, with approximately 85% of the response attributed to it. Additionally, morphine modulates pain transmission by blocking nociceptive signals and inhibiting primary afferent nociceptors in the spinal cord.

Pharmacodynamics

Morphine binding to opioid receptors blocks the transmission of nociceptive signals, modulating pain pathways within the spinal cord. Its onset of action ranges from 6 to 30 minutes, with effects varying based on individual factors such as sex; for instance, the EC50 for analgesia is lower in women than in men. Chronic use can lead to alterations in neuroplasticity, affecting synaptic structures and potentially leading to tolerance or dependence. Morphine's analgesic effects also include respiratory depression, which is a significant risk associated with its use.

Pharmacokinetics

Morphine is absorbed through various routes, including oral and intravenous administration, with its bioavailability being significantly lower when taken orally due to first-pass metabolism. The drug is extensively metabolized in the liver, primarily to morphine-3-glucuronide and morphine-6-glucuronide. The elimination half-life of morphine ranges from 2 to 4 hours, but can be prolonged in patients with renal or hepatic impairment. Morphine is excreted mainly via the kidneys, necessitating dose adjustments in patients with renal dysfunction to prevent accumulation and increased risk of adverse effects.

Contra-indications

• Severe respiratory depression
• Acute or severe bronchial asthma
• Known or suspected gastrointestinal obstruction
• Hypersensitivity to morphine or any component of the formulation

Adverse effects

• Diarrhoea
• Gastrointestinal disturbances
• Drowsiness
• Depression
• Hypotension
• Nausea
• Vomiting
• Constipation
• Erectile dysfunction
• Visual impairment
• Tremors
• Hyperalgesia
• Seizures
• Withdrawal syndrome

Interactions

• Ritonavir may decrease morphine concentration
• Nirmatrelvir boosted with ritonavir may decrease morphine concentration
• Pitolisant may decrease morphine exposure
• Rifampicin may decrease morphine exposure

Precautions

• Caution in patients with pancreatitis
• Caution in patients with hepatic impairment
• Caution in patients with renal impairment
• Caution in patients with a history of substance use disorder
• Monitor for signs of respiratory depression
• Dose adjustments may be necessary in the elderly or those with comorbidities

Pregnancy

Use only if potential benefit outweighs risk, as morphine may affect fetal development

Breast-feeding

Use with caution; avoid if possible due to lack of information on excretion in breast milk

Storage

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

Formulations

• Oral solution
• Modified-release capsules
• Injection solution
• Tablets

Indications

• Severe acute diarrhoea when other treatments are ineffective (specialist use only)
• Palliative care for pain management

Dosage

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

Adults: Initially 500 micrograms daily, adjusted according to response, maximum daily dose to be given in divided doses; maximum 16 mg per day.

Mechanism of action

Opium exerts its effects primarily through the activation of opioid receptors in the central nervous system (CNS), particularly the mu-opioid receptor. This leads to inhibition of neurotransmitter release, resulting in reduced perception of pain and altered emotional response to painful stimuli. Additionally, its action on peripheral opioid receptors can decrease gastrointestinal motility, which is beneficial in treating diarrhoea.

Pharmacodynamics

Opium produces its analgesic effects by binding to opioid receptors, leading to a decrease in the transmission of pain signals and an increase in pain tolerance. It also causes sedation and euphoria, which can contribute to its potential for misuse. Tolerance may develop with prolonged use, and its withdrawal can lead to severe physical and psychological symptoms.

Pharmacokinetics

Opium is absorbed from the gastrointestinal tract, and its active components undergo extensive metabolism in the liver. The half-life of morphine, the primary active component, varies but typically ranges from 2 to 4 hours. Excretion occurs primarily via the kidneys. The pharmacokinetic profile can be influenced by factors such as liver function and concurrent medications.

Contra-indications

• Hypersensitivity to opium or any of its components
• Severe respiratory depression
• Acute or severe bronchial asthma
• Paralytic ileus
• Acute abdominal condition
• Concurrent use with monoamine oxidase inhibitors (MAOIs)

Adverse effects

• Constipation
• Sedation
• Nausea
• Vomiting
• Dizziness
• Dry mouth
• Euphoria
• Potential for dependence or abuse
• Respiratory depression

Interactions

• CNS depressants (e.g., alcohol, benzodiazepines) may enhance sedation
• MAO inhibitors can increase the risk of severe reactions
• Concurrent use with other opioids can lead to additive effects

Precautions

• Use with caution in elderly patients
• Caution in patients with liver disease
• Monitor for signs of respiratory depression
• Careful assessment of any history of substance abuse

Pregnancy

Opium is not recommended during pregnancy due to potential risks of dependence in the fetus and withdrawal symptoms at birth.

Breast-feeding

Use with caution; the amount excreted in breast milk is likely too small to be harmful, but monitoring of the infant is advised.

Storage

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

Formulations

• Opium tincture
• Opium powder
• Opium tablets
• Opium capsules

Indications

• Muscle pain
• Joint pain
• Rheumatism
• Strains and sprains
• Minor aches

Dosage

Children: Refer to specific product guidelines. Consult the BNF for Children for appropriate dosing based on age and weight.

Adults: Apply to the affected area as directed, usually 3-4 times daily. Refer to specific product guidelines for concentration and formulation.

Mechanism of action

Camphor exerts its effects primarily through the activation of transient receptor potential (TRP) channels, particularly TRPA1 and TRPV3, which mediates sensations of pain and temperature. This activation leads to a local warming sensation and increased blood flow to the area, which contributes to its analgesic and anti-inflammatory effects. Camphor may also have a mild antibacterial effect.

Pharmacodynamics

Camphor's pharmacodynamic effects include local irritation leading to an increase in blood circulation to the area of application, which helps in alleviating pain and inflammation. It can stimulate nerve endings, providing a counterirritant effect that interrupts pain signals. Additionally, camphor may evoke a cooling sensation which can provide symptomatic relief from discomfort.

Pharmacokinetics

Camphor is absorbed through the skin and can enter systemic circulation, although its effects are primarily local. The absorption rate can vary based on the formulation and concentration used. Camphor is metabolized in the liver and is excreted mainly in the urine. Its half-life can vary but is generally short, necessitating frequent application for sustained effects.

Contra-indications

• Hypersensitivity to camphor or any of the excipients
• Severe renal impairment
• Severe hepatic impairment
• History of seizures or epilepsy

Adverse effects

• Skin irritation
• Allergic reactions including rash or itching
• Nausea
• Vomiting
• Headache
• Dizziness
• Increased heart rate
• Seizures in high doses

Interactions

• May interact with anticoagulants, increasing the risk of bleeding
• Caution in patients taking other CNS stimulants or depressants

Precautions

• Use with caution in patients with a history of seizures
• Avoid application to broken skin or mucous membranes
• Not to be ingested or applied to large areas of skin

Pregnancy

Camphor should be used with caution during pregnancy. High doses may be harmful to the fetus.

Breast-feeding

Camphor is excreted in breast milk; use with caution and consult a healthcare professional.

Storage

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

Formulations

• Camphorated oil
• Camphor cream
• Camphor ointment
• Camphor patches

Indications

• Cough
• Upper respiratory tract infections
• Sore throat
• Digestive discomfort

Dosage

Children: Refer to established guidelines and consider individual needs and product formulations, as specific dosing may vary.

Adults: Refer to established guidelines and consider individual needs and product formulations, as specific dosing may vary.

Mechanism of action

The mechanism of action of oxymel is not precisely defined but is believed to involve the combined effects of its constituents. Honey has natural antibacterial and anti-inflammatory properties, which may help soothe irritated mucous membranes and reduce coughing. Vinegar, particularly apple cider vinegar, is thought to have antimicrobial effects and may assist in breaking down mucus, facilitating easier breathing.

Pharmacodynamics

Oxymel is primarily used for its soothing effects on the throat and its potential to act as an expectorant. Honey can also stimulate the immune system and has been shown to possess antiviral properties. The presence of acetic acid in vinegar may help to alter the pH in the stomach, potentially enhancing digestive processes and nutrient absorption, indirectly supporting overall health during illness.

Pharmacokinetics

Due to its natural composition, the pharmacokinetics of oxymel are not extensively studied. However, the individual components, honey and vinegar, are rapidly absorbed in the gastrointestinal tract. Honey is metabolized primarily in the liver, while acetic acid is rapidly absorbed and metabolized through the Krebs cycle, providing energy and influencing metabolic pathways. The effects of oxymel are generally observed shortly after ingestion, depending on individual factors.

Pregnancy

Oxymel is traditionally used as a remedy and lacks extensive clinical studies to assess its safety during pregnancy. Caution is advised, and consultation with a healthcare provider is recommended.

Breast-feeding

Due to a lack of comprehensive studies, it is advisable to consult a healthcare professional before using oxymel while breastfeeding.

Storage

Store in a cool, dry place away from direct sunlight. Ensure the container is tightly closed to prevent contamination.

Formulations

• Syrup
• Liquid preparation

Indications

• Heart failure
• Edema
• Hypertension
• Congestive heart failure

Dosage

Children: Refer to the BNF for Children for specific dosage information regarding squill in paediatric patients.

Adults: Refer to the BNF for specific dosage information regarding squill in adults.

Mechanism of action

Squill contains cardiac glycosides, which inhibit the Na+/K+ ATPase enzyme. This inhibition leads to an increase in intracellular sodium levels, which causes an increase in intracellular calcium levels via the sodium-calcium exchanger. This results in enhanced myocardial contractility (positive inotropic effect) and a reduction in heart rate (negative chronotropic effect). Additionally, squill promotes diuresis by increasing renal blood flow and glomerular filtration rate.

Pharmacodynamics

The positive inotropic effect of squill enhances cardiac output and is useful in the management of certain heart conditions. The diuretic effect aids in fluid management, making it beneficial for patients with heart failure or edema. However, the therapeutic window is narrow, and toxicity can occur with overdose, leading to arrhythmias and gastrointestinal disturbances.

Pharmacokinetics

The pharmacokinetics of squill have not been extensively studied. However, it is generally understood that the active glycosides are absorbed in the gastrointestinal tract, with peak plasma concentrations occurring within a few hours after ingestion. The elimination half-life is variable and depends on the specific glycoside. The metabolites are primarily excreted via the kidneys.

Pregnancy

The safety of squill during pregnancy has not been established. Use only if clearly needed and prescribed by a healthcare provider.

Breast-feeding

It is not known whether squill is excreted in human milk. Caution should be exercised when administering to breastfeeding women.

Storage

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

Indications

• Herbal remedy for anxiety
• Support for digestive health
• Anti-inflammatory support
• Antimicrobial effects
• Pain relief
• Support for immune function

Dosage

Children: Refer to specific tincture product instructions for dosage, as this varies significantly based on the plant and concentration.

Adults: Refer to specific tincture product instructions for dosage, as this varies significantly based on the plant and concentration.

Mechanism of action

The mechanism of action of tinctures depends on the specific herbs or plants used in their preparation. Generally, the active compounds extracted from the plant material interact with various biological pathways, including receptor modulation, enzyme inhibition, and antioxidant activity. For example, flavonoids and alkaloids found in many tinctures may exhibit anti-inflammatory, analgesic, or antimicrobial effects through their interaction with cellular signaling pathways.

Pharmacodynamics

The pharmacodynamics of tinctures is influenced by the specific constituents of the herbal material. These constituents may exert effects such as enhancing or inhibiting neurotransmitter activity, modulating inflammatory responses, or influencing metabolic pathways. The effects can vary widely among different tinctures based on the plant used, the extraction method, and the concentration of the active ingredients.

Pharmacokinetics

The pharmacokinetics of tinctures involves absorption, distribution, metabolism, and excretion of the active compounds. After administration, the alcohol or vinegar solvent aids in the rapid absorption of these compounds through the mucosal membranes or gastrointestinal tract. Once absorbed, the compounds are distributed throughout the body and may undergo metabolic transformations primarily in the liver. The elimination half-life varies based on the specific herb and its active constituents, with some compounds being excreted unchanged while others are metabolized into active or inactive metabolites.

Contra-indications

• Hypersensitivity to any component of the tincture
• Severe liver disease
• Pregnancy (specific tinctures may vary)

Adverse effects

• Skin irritation
• Allergic reactions
• Gastrointestinal upset
• Drowsiness or sedation (depending on the active ingredient)

Interactions

• May interact with alcohol, increasing sedative effects
• Potential interactions with other CNS depressants
• May affect the metabolism of certain drugs via hepatic pathways

Precautions

• Use cautiously in patients with a history of substance abuse
• Monitor liver function in patients with liver disease
• Caution in operating machinery or driving due to potential drowsiness

Pregnancy

Generally not recommended during pregnancy due to potential risks associated with alcohol and other active ingredients.

Breast-feeding

Caution is advised, as components may pass into breast milk and affect the infant.

Storage

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

Formulations

• Tinctures of various herbs and compounds, including but not limited to: echinacea, valerian, and calendula

Mechanism of action

Morphine-6-glucuronide is responsible for approximately 85% of the response observed by morphine administration. Morphine and its metabolites act as agonists of the mu and kappa opioid receptors. The mu-opioid receptor is integral to morphine's effects on the ventral tegmental area of the brain. Morphine's activation of the reward pathway is mediated by agonism of the delta-opioid receptor in the nucleus accumbens, while modification of the respiratory system and addiction disorder are mediated by agonism of the mu-opioid receptor. Visual analysis of the direct electroencephalograph has revealed that morphine /slowed/ the predominant frequency and /increased/ high-voltage delta activity.

Pharmacodynamics

Morphine binding to opioid receptors blocks transmission of nociceptive signals, signals pain-modulating neurons in the spinal cord, and inhibits primary afferent nociceptors to the dorsal horn sensory projection cells. Morphine has a time to onset of 6-30 minutes. Excess consumption of morphine and other opioids can lead to changes in synaptic neuroplasticity, including changes in neuron density, changes at postsynaptic sites, and changes at dendritic terminals. Intravenous morphine's analgesic effect is sex dependent. The EC₅₀ in men is 76ng/mL and in women is 22ng/mL. Morphine-6-glucuronide is 22 times less potent than morphine in eliciting pupil constriction.