FDA/SD.245-112068

Indications

• Cognitive development and function
• Support in visual acuity
• Management of inflammatory conditions
• Cardiovascular health
• Neuroprotection

Dosage

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

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

Mechanism of action

DHA is incorporated into cell membranes, particularly in the brain and retina, where it influences membrane fluidity and function. It also serves as a precursor for the synthesis of specialized pro-resolving mediators (SPMs) that help resolve inflammation. Additionally, DHA can modulate gene expression and signal transduction pathways, affecting neuronal growth, survival, and synaptic plasticity.

Pharmacodynamics

DHA has been shown to support cognitive function, visual acuity, and cardiovascular health. Its anti-inflammatory effects are mediated through the production of resolvins and protectins, which are derived from DHA and play a role in resolving inflammation and promoting tissue repair. DHA's beneficial effects on neural function are attributed to its role in maintaining neuronal integrity and promoting neurogenesis.

Pharmacokinetics

DHA is absorbed from the gastrointestinal tract and is distributed widely in body tissues, with a high concentration in the brain and retina. Its half-life varies, but it is typically metabolized in the liver. DHA levels can be influenced by dietary intake and the body's metabolic demands, with higher concentrations observed in individuals with higher fish consumption.

Adverse effects

• Gastrointestinal discomfort
• Nausea
• Diarrhea
• Increased bleeding tendency
• Allergic reactions

Interactions

• Anticoagulants may enhance the risk of bleeding
• Antiplatelet drugs may increase bleeding risk
• Some antihypertensive medications may interact

Precautions

• Caution in patients with bleeding disorders
• Monitor patients on anticoagulant therapy closely
• Assess for fish allergies before use

Pregnancy

Docohexaenoic acid (DHA) is generally considered safe during pregnancy and is important for fetal brain development. Consultation with a healthcare provider is recommended.

Breast-feeding

DHA is excreted in breast milk and is beneficial for breastfeeding infants. It is important for neurodevelopment.

Storage

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

Formulations

• Softgel capsules
• Liquid fish oil
• Powder for reconstitution

Indications

• Hyperlipidemia
• Cardiovascular disease prevention
• Rheumatoid arthritis
• Inflammatory bowel disease
• Major depressive disorder

Dosage

Children: Refer to BNF for Children for specific dosing guidelines.

Adults: Refer to BNF for specific dosing guidelines, generally available in the form of supplements or prescription formulations.

Mechanism of action

Eicosapentaenoic acid works by influencing the production of eicosanoids, which are signaling molecules derived from fatty acids. It competes with arachidonic acid in the enzymatic pathways, leading to the production of less inflammatory eicosanoids. This shift in eicosanoid production is believed to contribute to reduced inflammation and improved cardiovascular outcomes.

Pharmacodynamics

The pharmacodynamic effects of EPA include the modulation of lipid levels, reduction of triglycerides, and anti-inflammatory effects. It has been shown to decrease platelet aggregation and may improve endothelial function, thus contributing to cardiovascular protection.

Pharmacokinetics

Eicosapentaenoic acid is readily absorbed from the gastrointestinal tract following oral administration. It undergoes metabolic processes in the liver and is incorporated into cell membranes, affecting cell signaling and inflammatory responses. The half-life of EPA is variable, influenced by dosage and individual metabolism, and it is primarily excreted in the urine and feces.

Adverse effects

• Nausea
• Diarrhea
• Abdominal pain
• Flatulence
• Rash

Precautions

• Use with caution in patients with known hypersensitivity to fish or shellfish.
• Monitor patients on anticoagulant therapy due to potential for increased bleeding risk.

Pregnancy

There are no adequate and well-controlled studies in pregnant women. Eicosapentaenoic acid should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Breast-feeding

Eicosapentaenoic acid is excreted in breast milk. Caution should be exercised when administering to nursing mothers.

Storage

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

Formulations

• Capsules
• Liquid formulations

Indications

• Cardiovascular disease prevention
• Hyperlipidemia
• Inflammatory conditions
• Cognitive decline and dementia
• Mood disorders

Dosage

Children: Refer to specific dietary guidelines or healthcare professional recommendations for fish intake in children as there is no established pharmacological dosage.

Adults: Refer to specific dietary guidelines or healthcare professional recommendations for fish intake as there is no established pharmacological dosage.

Mechanism of action

The beneficial effects of fish, particularly fatty fish, are primarily attributed to their high content of omega-3 fatty acids, specifically eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These omega-3 fatty acids modulate lipid metabolism and inflammatory pathways, leading to reduced levels of triglycerides, lower blood pressure, and improved endothelial function. They also influence the synthesis of eicosanoids, which are signaling molecules that play a role in inflammation and immune responses.

Pharmacodynamics

Omega-3 fatty acids from fish have anti-inflammatory properties and can help reduce the risk of chronic diseases. They are known to improve lipid profiles by lowering triglycerides and increasing HDL cholesterol. Additionally, they may enhance insulin sensitivity and have a positive effect on mood disorders, such as depression, through their impact on brain health and neuroprotection.

Pharmacokinetics

Omega-3 fatty acids are absorbed in the intestine and transported in the bloodstream in the form of triglycerides. They are incorporated into cell membranes and can influence cell signaling pathways. The half-life of omega-3 fatty acids can vary, but they tend to have sustained effects on the body due to their incorporation into cellular structures. Fish consumption leads to a gradual accumulation of these fatty acids in tissues, which can exert health benefits over time.

Adverse effects

• Allergic reactions
• Gastrointestinal upset
• Heavy metal accumulation
• Mercury poisoning

Interactions

• May interact with anticoagulants
• Potential interactions with certain antibiotics

Precautions

• Monitor for allergic reactions
• Consider heavy metal content in certain fish
• Use caution in patients with seafood allergies

Pregnancy

Generally considered safe; however, pregnant individuals should avoid high-mercury fish such as shark, swordfish, and king mackerel.

Breast-feeding

Safe to consume, but similar advice regarding mercury exposure applies.

Storage

Store in a cool, dry place. Refrigerate fresh fish and consume within a few days to maintain freshness.

Formulations

• Fresh fish
• Frozen fish
• Canned fish
• Fish oil supplements

Indications

• Chronic pain management
• Palliative care
• Neuropathic pain
• Cancer pain
• Severe acute pain

Dosage

Children: Refer to the BNF for Children for appropriate dosing information tailored to paediatric patients.

Adults: Refer to the BNF for specific dosing recommendations based on individual patient needs and clinical circumstances.

Mechanism of action

Providing acts primarily as an analgesic by modulating pain pathways in the central nervous system. It inhibits the reuptake of neurotransmitters involved in pain perception, such as serotonin and norepinephrine, thereby increasing their availability and enhancing analgesic effects. Additionally, it may interact with opioid receptors to provide pain relief.

Pharmacodynamics

The pharmacodynamics of Providing involve its ability to alter pain perception and improve the overall experience of comfort in patients. By acting on both the central and peripheral nervous systems, it can reduce the perception of pain, alleviate anxiety, and promote a sense of well-being.

Pharmacokinetics

Providing is absorbed rapidly from the gastrointestinal tract, with peak plasma concentrations occurring within a few hours of administration. It undergoes extensive hepatic metabolism, primarily through the cytochrome P450 system, and is excreted mainly through the kidneys. The elimination half-life varies, influencing dosing frequency depending on patient-specific factors such as age, liver function, and renal function.

Pregnancy

There is limited data on the safety of providing during pregnancy, consult relevant guidelines and literature.

Breast-feeding

Caution is advised when using providing while breastfeeding, as it may affect milk production.

Storage

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

Indications

• Prevention of vitamin E deficiency
• Antioxidant therapy
• Support in conditions related to oxidative stress

Dosage

Children: Refer to BNF for Children for specific dosage guidelines.

Adults: Refer to BNF for specific dosage guidelines.

Mechanism of action

Tocopherol acts as a radical scavenger, primarily functioning as an antioxidant for lipid bilayers. It donates hydrogen atoms to free radicals, trapping them and preventing cellular damage. Its effectiveness is influenced by its location within the membrane and its interaction with cytosolic reductants like ascorbate. Tocopherol can trap multiple radicals, including alkyl and peroxy radicals.

Pharmacodynamics

The antioxidant properties of tocopherol lead to significant pharmacodynamic effects, including the inhibition of cell death through modulation of protein kinase C (PKC). Tocopherol also exhibits anti-inflammatory effects, which can be attributed to its influence on cytokines, prostaglandins, prostanoids, and thromboxanes. These interactions may contribute to its protective effects in various pathological conditions.

Pharmacokinetics

Tocopherol is absorbed in the intestines and its bioavailability can be influenced by dietary fat intake. It is transported in the plasma primarily bound to lipoproteins. Tocopherol is stored in adipose tissue and the liver, and its elimination occurs through bile and urine. The half-life of tocopherol can vary depending on the individual's nutritional status and other factors.

Pregnancy

Tocopherol is generally considered safe during pregnancy, but it is advisable to consult a healthcare provider before use.

Breast-feeding

Tocopherol is excreted in breast milk, and while it is considered safe, a healthcare provider should be consulted for specific recommendations.

Storage

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

Mechanism of action

Tocopherol acts as a radical scavenger. It mainly acts as an antioxidant for lipid bilayers. Tocopherol's functions depend on the H-atom donating ability, location, and movement within the membrane, as well as the efficiency in the radical recycling by some cytosolic reductants such as ascorbate. Tocopherol actions are related to the trap of radicals, and it has been shown that even in the absence of substituents in the ortho-positions, tocopherol can trap more than two radicals. The type of radicals available for tocopherol are alkyl and peroxy.

Pharmacodynamics

The antioxidant effects of tocopherol can be translated into different changes at the pharmacodynamic level. In vitro studies have shown that this antioxidant activity can produce modification in protein kinase C (PKC) which will later be translated into an inhibition of cell death. Some other derivate effects are the anti-inflammatory properties of tocopherol which can be related to the modulation of cytokines or prostaglandins, prostanoids and thromboxanes.