LACOFF CODEIN

Indications

• Acute cough
• Chronic cough
• Cough due to respiratory infections
• Cough associated with asthma
• Cough in chronic obstructive pulmonary disease (COPD)
• Allergic cough
• Post-nasal drip syndrome

Dosage

Children: Refer to the BNF for Children for specific dosing information based on the selected medication and age of the child.

Adults: Refer to the BNF for specific dosing information based on the selected medication and indication for cough.

Mechanism of action

Cough medications can act through various mechanisms depending on their classification. Cough suppressants (antitussives) like dextromethorphan inhibit the cough reflex in the brain, while expectorants like guaifenesin increase mucus secretion, making it easier to expel. Mucolytics, such as acetylcysteine, break down mucus structure, facilitating clearance from the airways.

Pharmacodynamics

The pharmacodynamics of cough medications vary widely. Antitussives primarily reduce the sensitivity of the cough reflex pathways in the central nervous system. Expectorants promote increased mucus production and reduce viscosity, aiding in expectoration. Mucolytics alter the physical properties of mucus, enhancing its clearance from the respiratory tract.

Pharmacokinetics

The pharmacokinetics of cough medications differ among classes. Antitussives are generally well-absorbed orally, with peak plasma concentrations occurring within 1-2 hours. They are metabolized in the liver and excreted primarily through urine. Expectorants and mucolytics also exhibit similar absorption profiles and are eliminated through renal pathways, although their metabolism may involve different enzymatic processes in the liver.

Pregnancy

Consult with a healthcare provider for advice regarding use during pregnancy.

Breast-feeding

Consult a healthcare provider before use during breastfeeding.

Storage

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

Indications

• Cough relief
• Anxiety management
• Insomnia treatment
• Weight loss
• Pain relief

Dosage

Children: Refer to specific drug guidelines for exact dosing, as it varies by the type of suppressant used.

Adults: Refer to specific drug guidelines for exact dosing, as it varies by the type of suppressant used.

Mechanism of action

Suppressants may act through various mechanisms depending on their specific type. For example, central nervous system depressants may enhance the effects of neurotransmitters like gamma-aminobutyric acid (GABA) to induce sedation or relaxation. Respiratory suppressants may inhibit the cough reflex by acting on the cough center in the medulla oblongata. Appetite suppressants may work by influencing neurotransmitter levels, such as serotonin or norepinephrine, to promote feelings of satiety.

Pharmacodynamics

The pharmacodynamics of suppressants generally involve modulation of neurotransmitter activity, leading to reduced physiological responses. For central nervous system depressants, this may result in decreased neuronal excitability and calming effects. In the case of respiratory suppressants, the inhibition of the cough reflex provides symptomatic relief, while appetite suppressants may alter the signaling pathways involved in hunger and satiety, leading to reduced food intake.

Pharmacokinetics

The pharmacokinetics of suppressants can vary widely based on the specific agent. Generally, they are absorbed through the gastrointestinal tract and metabolized by the liver, with varying half-lives that influence dosing frequency. Many suppressants are excreted through the kidneys, and their onset of action can differ based on their formulation, whether immediate-release or extended-release. Factors such as age, weight, and liver function can affect the pharmacokinetics of these drugs.

Adverse effects

• Drowsiness
• Dizziness
• Nausea
• Vomiting
• Constipation
• Dry mouth
• Confusion
• Respiratory depression

Interactions

• Alcohol, which may enhance sedative effects
• Central nervous system depressants, such as benzodiazepines and opioids, which may increase risk of respiratory depression
• Certain antidepressants and antipsychotics, which may increase drowsiness

Precautions

• Use with caution in patients with a history of substance abuse
• Monitor for signs of respiratory depression, especially in elderly or frail patients
• Caution in patients with pre-existing respiratory conditions

Pregnancy

Safety during pregnancy has not been established. Use only if the potential benefit justifies the potential risk to the fetus.

Breast-feeding

Use with caution as it may pass into breast milk and affect the nursing infant.

Storage

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

Formulations

• Oral tablets
• Syrups
• Inhalation solutions
• Injectable solutions