KOFLYN MIXED FRUIT COMBINATION PRODUCT SYRUP

Indications

• Hepatic encephalopathy
• Urea cycle disorders
• Metabolic alkalosis
• Acid-base balance disorders

Dosage

Children: Refer to pediatric dosing guidelines provided in clinical references, as doses depend on the specific condition and the child's age and weight.

Adults: Refer to specific clinical guidelines for adult dosing recommendations, as they can vary based on the condition being treated and individual patient factors.

Mechanism of action

Ammonium acts primarily as a nitrogen donor in the urea cycle, facilitating the conversion of ammonia to urea for excretion. This process helps to detoxify ammonia, which is a byproduct of protein metabolism. In the liver, ammonia is converted to ammonium, which then enters the urea cycle for further processing. Additionally, ammonium can influence acid-base homeostasis by participating in buffering reactions in the kidneys.

Pharmacodynamics

The pharmacodynamics of ammonium are closely related to its role in nitrogen metabolism and acid-base balance. By increasing the excretion of nitrogenous waste through urea formation, ammonium helps to lower blood ammonia levels, which can be toxic at elevated concentrations. Furthermore, ammonium ions can affect intracellular pH and influence neurotransmitter release, particularly in the central nervous system, which is relevant in conditions like hepatic encephalopathy.

Pharmacokinetics

Ammonium is rapidly absorbed and distributed in the body. It can cross cellular membranes, influencing intracellular and extracellular fluid composition. Ammonium is primarily eliminated through renal excretion, where it can be excreted as free ammonium or as part of urea. The half-life of ammonium in the body is not well-defined, as it is continuously produced and eliminated depending on metabolic activity and dietary protein intake.

Contra-indications

• Severe renal impairment
• Hypersensitivity to ammonium compounds

Adverse effects

• Nausea
• Vomiting
• Diarrhea
• Abdominal pain
• Dizziness
• Headache
• Confusion
• Tremors
• Respiratory depression

Interactions

• May enhance the effects of neuromuscular blocking agents
• May interact with other central nervous system depressants

Precautions

• Use with caution in patients with liver disease
• Monitor electrolytes in patients with renal impairment
• Caution in patients with a history of seizures

Pregnancy

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

Breast-feeding

Use with caution. Monitor the infant for any adverse effects.

Storage

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

Formulations

• Ammonium chloride solution
• Ammonium sulfate
• Ammonium hydroxide

Indications

• Allergic rhinitis (hay fever)
• Urticaria (hives)
• Allergic conjunctivitis
• Common cold symptoms

Dosage

Children: For children aged 6-12 years, the dose is typically 2 mg every 4 to 6 hours, not exceeding 12 mg per day. For children under

Adults: The usual adult dose for chlorpheniramine is 4 mg every 4 to 6 hours, not to exceed 24 mg per day.

Mechanism of action

Chlorpheniramine binds to the histamine H1 receptor, preventing endogenous histamine from exerting its effects. This leads to temporary relief from symptoms such as sneezing, pruritus, and increased vascular permeability associated with allergic reactions. The drug competes with histamine for H1-receptor sites on effector cells, thus antagonizing most of the pharmacological effects of histamine, including its actions on smooth muscle and vascular permeability.

Pharmacodynamics

In allergic reactions, allergens trigger the degranulation of mast cells and basophils, leading to the release of histamine. Chlorpheniramine, as an H1 antagonist, competes for receptor binding, effectively blocking histamine-induced effects, such as itching, vasodilation, and bronchoconstriction. This results in relief from symptoms like sneezing, watery eyes, and nasal discharge.

Pharmacokinetics

Chlorpheniramine is well absorbed from the gastrointestinal tract. It undergoes hepatic metabolism and its effects can last for several hours. The onset of action is typically observed within 1 to 2 hours following oral administration, with peak effects occurring around 2 to 6 hours. The drug is eliminated primarily through urine, with a half-life ranging from 12 to 15 hours, though this can vary based on individual factors.

Contra-indications

• Hypersensitivity to chlorpheniramine or any component of the formulation
• Acute asthma attacks
• Severe hypertension
• Narrow-angle glaucoma
• Prostatic hypertrophy

Adverse effects

• Drowsiness
• Dizziness
• Dry mouth
• Blurred vision
• Constipation
• Urinary retention
• Confusion
• Headache

Interactions

• Alcohol
• CNS depressants
• MAO inhibitors
• Anticholinergic agents
• Beta-blockers

Precautions

• Use with caution in patients with cardiovascular disease
• Caution in patients with liver or kidney impairment
• Avoid in elderly patients due to increased risk of sedation and anticholinergic effects
• May impair the ability to drive or operate machinery

Pregnancy

Chlorpheniramine should be used in pregnancy only if clearly needed. Consult medical professionals for guidance.

Breast-feeding

Chlorpheniramine is excreted in breast milk. Caution is advised when administering to nursing mothers.

Storage

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

Formulations

• Tablets
• Syrup
• Oral suspension

Mechanism of action

Chlorpheniramine binds to the histamine H1 receptor. This blocks the action of endogenous histamine, which subsequently leads to temporary relief of the negative symptoms brought on by histamine. Antihistamines used in the treatment of allergy act by competing with histamine for H1-receptor sites on effector cells. They thereby prevent, but do not reverse, responses mediated by histamine alone. Antihistamines antagonize, in varying degrees, most of the pharmacological effects of histamine, including urticaria and pruritus. Also, the anticholinergic actions of most antihistamines provide a drying effect on the nasal mucosa. /Antihistamines/ H1 antagonists inhibit most responses of smooth muscle to histamine. Antagonism of the constrictor action of histamine on respiratory smooth muscle is easily shown in vivo and in vitro. /Histamine Antagonists: H1 Antagonists/ H1 antagonists strongly block the action of histamine that results in increased permeability and formation of edema and wheal. /Histamine Antagonists: H1 Antagonists/ Within the vascular tree, the H1 antagonists inhibit both the vasoconstrictor effects of histamine and, to a degree, the more rapid vasodilator effects that are mediated by H1 receptors on endothelial cells. Residual vasodilatation reflects the involvement of H2 receptors on smooth muscle and can be suppressed only by the concurrent administration of an H2 antagonist. Effects of the histamine antagonists on histamine induced changes in systemic blood pressure parallel these vascular effects. /Histamine Antagonists: H1 Antagonists/ Many of the H1 antagonists tend to inhibit responses to acetylcholine that are mediated by muscarinic receptors. These atropine like actions are sufficiently prominent in some of the drugs to be manifest during clinical usage ... . /Histamine Antagonists: H1 Antagonists/

Pharmacodynamics

In allergic reactions an allergen interacts with and cross-links surface IgE antibodies on mast cells and basophils. Once the mast cell-antibody-antigen complex is formed, a complex series of events occurs that eventually leads to cell-degranulation and the release of histamine (and other chemical mediators) from the mast cell or basophil. Once released, histamine can react with local or widespread tissues through histamine receptors. Histamine, acting on H₁-receptors, produces pruritis, vasodilatation, hypotension, flushing, headache, tachycardia, and bronchoconstriction. Histamine also increases vascular permeability and potentiates pain. Chlorpheniramine, is a histamine H1 antagonist (or more correctly, an inverse histamine agonist) of the alkylamine class. It competes with histamine for the normal H₁-receptor sites on effector cells of the gastrointestinal tract, blood vessels and respiratory tract. It provides effective, temporary relief of sneezing, watery and itchy eyes, and runny nose due to hay fever and other upper respiratory allergies.