ORASOL

Indications

• Electrolyte replacement therapy
• Management of metabolic alkalosis
• Supportive treatment in dehydration

Dosage

Children: Refer to the BNF for Children for specific dosing guidelines tailored to pediatric patients.

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

Mechanism of action

Chlorides mainly function as electrolytes in the body. They help maintain cellular osmotic pressure and are involved in the transport of other ions across cell membranes, particularly in the kidneys, where they assist in regulating fluid balance and blood pressure. Chloride ions are also crucial in the production of gastric acid (hydrochloric acid) in the stomach, which aids in digestion.

Pharmacodynamics

Chloride ions are essential for various physiological processes. They play a significant role in maintaining the body's acid-base homeostasis, ensuring that the pH levels remain stable. The presence of chloride ions in extracellular fluid helps regulate fluid balance through osmotic pressure. Additionally, chloride ions are involved in the transmission of electrical impulses in nerves and muscles, supporting proper muscular function and nerve signaling.

Pharmacokinetics

Chlorides are readily absorbed in the gastrointestinal tract and distributed throughout the body via the bloodstream. The kidneys filter chloride ions, reabsorbing them as needed to maintain homeostasis. Excess chloride is excreted in urine. The half-life of chloride in the body can vary depending on dietary intake and physiological conditions.

Indications

• Hypoglycemia
• Caloric supplementation in patients unable to eat
• Fluid replacement therapy
• Parenteral nutrition

Dosage

Children: Paediatric doses must be determined based on clinical condition and specific needs. Refer to the BNF for Children for appropriate dosing information.

Adults: The dosage of dextrose in adults varies based on clinical condition and route of administration. For hypoglycemia, intravenous dextrose 50% (D50W) is commonly administered. Refer to the BNF for specific dosing guidelines.

Mechanism of action

Dextrose supplies energy to tissues by generating ATP and NADH through glycolysis, where glucose is phosphorylated by hexokinase to form glucose 6-phosphate. This activates glucose for breakdown, ultimately converting glucose into energy molecules. Dextrose also plays a role in gene transcription, enzyme activity, and hormone secretion, regulating glucose homeostasis and cellular metabolic integrity.

Pharmacodynamics

Blood glucose acts as a crucial energy source for cellular activities and functions as a signaling molecule. It is oxidized into carbon dioxide and water, producing energy through glycolysis, the citric cycle, and oxidative phosphorylation. Dextrose can be converted into fat for energy storage and is stored as glycogen in the liver and muscles. Its administration, particularly orally, enhances insulin secretion due to stimulation of incretin hormones.

Pharmacokinetics

Dextrose is rapidly absorbed in the gastrointestinal tract, leading to a quick elevation of blood glucose levels. It is distributed throughout the body and can be utilized by various tissues for energy. The metabolism of dextrose primarily occurs in the liver, where it can be stored as glycogen or converted into fat. Renal excretion may occur when blood glucose levels are excessively high.

Adverse effects

• Hyperglycemia
• Fluid overload
• Hypokalemia
• Thrombophlebitis at injection site

Interactions

• Corticosteroids may increase blood glucose levels
• Beta-blockers may mask symptoms of hypoglycemia
• Diuretics may cause electrolyte imbalances

Precautions

• Use with caution in patients with diabetes mellitus
• Monitor blood glucose levels regularly
• Use cautiously in patients with renal impairment or heart failure

Pregnancy

Dextrose is generally considered safe for use during pregnancy when clinically indicated, but should be used with caution.

Breast-feeding

Dextrose can be used during breastfeeding as it is a natural sugar found in breast milk.

Storage

Store at room temperature, away from direct sunlight, and protect from freezing.

Formulations

• Dextrose 5% solution for infusion
• Dextrose 10% solution for infusion
• Dextrose 50% solution for injection
• Oral dextrose tablets

Dosage

Children: Refer to specific medication guidelines for dosing.

Adults: Refer to specific medication guidelines for dosing.

Mechanism of action

Glucose supplies most of the energy to all tissues by generating energy molecules ATP and NADH during a series of metabolism reactions called glycolysis. Glycolysis can be divided into two main phases where the preparatory phase is initiated by the phosphorylation of glucose by hexokinase to form glucose 6-phosphate. The addition of the high-energy phosphate group activates glucose for the subsequent breakdown in later steps of glycolysis and is the rate-limiting step. Products end up as substrates for following reactions, to ultimately convert C6 glucose molecule into two C3 sugar molecules. These products enter the energy-releasing phase where the total of 4ATP and 2NADH molecules are generated per one glucose molecule. The total aerobic metabolism of glucose can produce up to 36 ATP molecules. These energy-producing reactions of glucose are limited to D-glucose as L-glucose cannot be phosphorylated by hexokinase. Glucose can act as precursors to generate other biomolecules such as vitamin C. It plays a role as a signaling molecule to control glucose and energy homeostasis. Glucose can regulate gene transcription, enzyme activity, hormone secretion, and the activity of glucoregulatory neurons. The types, number, and kinetics of glucose transporters expressed depends on the tissues and fine-tunes glucose uptake, metabolism, and signal generation to preserve cellular and whole body metabolic integrity. Vascular calcification is a hallmark of type 2 diabetes. Glucose stimulates calcification in culture of vascular smooth muscle cells (VSMCs) but the underlying mechanisms remain obscure. We observed that high glucose levels stimulated mouse and human VSMC trans-differentiation into chondrocytes, with increased levels of Sox9, type II collagen, glycosaminoglycan and Runx2 expression, and increased alkaline phosphatase activity and mineralization. These effects were associated with increased expression of IL-1beta, which stimulated alkaline phosphatase and calcification, suggesting that glucose induces chondrocyte differentiation of VSMCs, possibly through IL-1beta activation.

Pharmacodynamics

Blood glucose is an obligatory energy source for humans involved in various cellular activities, and it also acts as a signaling molecule for diverse glucose-sensing molecules and proteins. Glucose undergoes oxidation into carbon dioxide, water, and yields energy molecules in the process of glycolysis and subsequent citric cycle and oxidative phosphorylation. Glucose is readily converted into fat in the body which can be used as a source of energy as required. Under a similar conversion into storage of energy, glucose is stored in the liver and muscles as glycogen. Glucose stores are mobilized in a regulated manner, depending on the tissues' metabolic demands. Oral glucose tablets or injections serve to increase the supply of glucose and oral glucose administration is more effective in stimulating insulin secretion because it stimulates the incretin hormones from the gut, which promotes insulin secretion.