EROCIN-250

Indications

• Bacterial pharyngitis
• Sinusitis
• Pneumonia
• Skin and soft tissue infections
• Chlamydia infections
• Atypical mycobacterial infections
• Prophylaxis for endocarditis
• Gastrointestinal infections caused by Campylobacter or Helicobacter pylori

Dosage

Children: Refer to BNF for Children for specific dosing information, as pediatric dosing is determined

Adults: Refer to local guidelines or BNF for specific dosing information, which may vary based on infection type and severity.

Mechanism of action

Erythromycin exerts its antibacterial effect primarily through inhibition of protein synthesis. It binds to the 50S subunit of the bacterial ribosome, preventing the translocation of peptides during translation, which halts bacterial growth and replication. Erythromycin is considered a bacteriostatic agent at lower concentrations, but can exhibit bactericidal properties at higher concentrations against some pathogens.

Pharmacodynamics

The pharmacodynamic profile of erythromycin shows that it is active against a range of pathogens including Streptococcus pneumoniae, Staphylococcus aureus, and Mycoplasma pneumoniae. The drug's efficacy is influenced by its concentration at the site of infection and the susceptibility of the target organism. Resistance mechanisms include methylation of the adenine residue in the 23S rRNA, which reduces drug binding.

Pharmacokinetics

Erythromycin is well absorbed from the gastrointestinal tract, although food can reduce its absorption. It is extensively distributed in body tissues and fluids, and has a large volume of distribution. The drug undergoes hepatic metabolism and is excreted primarily in bile, with some renal excretion. The half-life of erythromycin is approximately 1.5 to 2 hours, but this can vary based on formulation and individual patient factors.

Contra-indications

• Hypersensitivity to erythromycin or any component of the formulation
• History of cholestatic jaundice or hepatic dysfunction associated with erythromycin
• Concurrent use of certain drugs that are contraindicated with erythromycin

Adverse effects

• Gastrointestinal disturbances (nausea, vomiting, diarrhea, abdominal pain)
• Cholestatic jaundice
• Hepatotoxicity
• Allergic reactions (rash, urticaria)
• QT interval prolongation leading to arrhythmias
• Ototoxicity (rare, especially with high doses)

Interactions

• Increased risk of cardiotoxicity when used with drugs that prolong the QT interval (e.g., certain antiarrhythmics, antipsychotics)
• Macrolide antibiotics may interact with warfarin, increasing the risk of bleeding
• Erythromycin can inhibit the metabolism of drugs metabolized by CYP3A4, leading to increased plasma levels of those drugs (e.g., statins, certain benzodiazepines)
• Concurrent use with digoxin may increase digoxin levels

Precautions

• Use with caution in patients with pre-existing liver disease
• Monitor for signs of hepatotoxicity during therapy
• Caution in patients with a history of cardiac arrhythmias
• Consider alternatives in patients who are pregnant or breastfeeding

Pregnancy

Erythromycin is generally considered safe for use during pregnancy, particularly in the first trimester, but should be used only if clearly needed.

Breast-feeding

Erythromycin is excreted in breast milk but is generally considered safe for use during breastfeeding.

Storage

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

Formulations

• Oral tablets (e.g., erythromycin base, erythromycin stearate)
• Oral suspension
• Intravenous formulation
• Topical formulations (ointment, gel)

Indications

• Malnutrition
• Gastrointestinal disorders
• Postoperative recovery
• Cancer cachexia
• Chronic illness requiring nutritional support

Dosage

Children: Refer to BNF for Children for appropriate paediatric dosing guidance based on age, weight, and clinical condition.

Adults: Refer to specific guidelines or BNF for detailed adult dosing recommendations, as it varies based on individual needs and clinical conditions.

Mechanism of action

Streate provides a balanced source of macronutrients that are metabolized to supply energy and support metabolic processes. The individual components, such as proteins, are broken down into amino acids, carbohydrates into glucose, and fats into fatty acids and glycerol, which are then utilized by the body for energy, growth, and repair.

Pharmacodynamics

The pharmacodynamic effects of Streate are primarily related to its nutritional content, contributing to the maintenance of body weight, muscle mass, and overall health. The macronutrients play critical roles in various physiological functions, including immune response, tissue repair, and metabolic homeostasis.

Pharmacokinetics

The pharmacokinetics of Streate depend on its formulation and route of administration. When administered enterally, the nutrients are digested and absorbed in the gastrointestinal tract. Carbohydrates are absorbed as monosaccharides, proteins as amino acids, and fats as fatty acids. The onset of action is generally immediate following absorption, with peak effects occurring as nutrients enter the systemic circulation.

Pregnancy

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

Breast-feeding

Use with caution, as the effects on the nursing infant are unknown.

Storage

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