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Erythromycin: Brands, Price & Uses in Bangladesh
Erythromycin is a macrolide antibiotic used to treat a range of bacterial infections and, in specific clinical contexts, to promote gastric motility.
About Erythromycin
Indications of Erythromycin
Erythromycin is a macrolide antibiotic used to treat a range of bacterial infections and, in specific clinical contexts, to promote gastric motility.
Established / FDA-approved uses
- Respiratory tract infections (e.g. community-acquired pneumonia, pertussis, streptococcal pharyngitis) caused by susceptible organisms
- Skin and soft tissue infections due to susceptible strains of Staphylococcus and Streptococcus
- Sexually transmitted infections, including uncomplicated urogenital, rectal, or chlamydial infections and early syphilis in penicillin-allergic patients
- Diphtheria (adjunct to antitoxin, and for carrier eradication)
- Legionnaires' disease
Guideline-supported / alternative uses
- Alternative agent for patients with penicillin allergy who require treatment of susceptible infections
- Prophylaxis against recurrent rheumatic fever in penicillin-allergic patients
- Prevention of bacterial endocarditis in penicillin-allergic patients undergoing certain dental/surgical procedures (per older guidance; consult current cardiology guidelines)
Off-label use
- Erythromycin is used off-label at sub-antibacterial doses as a prokinetic agent to improve gastric emptying in conditions such as diabetic gastroparesis, based on its motilin-receptor agonist activity. This use requires physician supervision.
Dosage & Administration of Erythromycin
Erythromycin should be taken exactly as prescribed by a physician. Do not stop, extend, skip doses, or share this medicine with others without medical advice, as inappropriate use of antibiotics contributes to antibiotic resistance.
| Indication | Adult Dose | Pediatric Dose |
|---|---|---|
| Respiratory tract / skin and soft tissue infections | 250-500 mg every 6 hours (or 333 mg every 8 hours), up to 4 g/day in severe infections | 30-50 mg/kg/day in 4 divided doses |
| Streptococcal pharyngitis | 250 mg every 6 hours for 10 days | 20-50 mg/kg/day in divided doses for 10 days |
| Pertussis | Base equivalent 40-50 mg/kg/day (max 2 g/day) in divided doses for 14 days | 40-50 mg/kg/day in divided doses for 14 days |
| Chlamydial genital infection (pregnancy, when doxycycline unsuitable) | 500 mg 4 times daily for 7 days (or per current guideline dosing) | Not applicable |
| Rheumatic fever prophylaxis (penicillin-allergic) | 250 mg twice daily | Weight-based, per physician guidance |
| Gastroparesis (off-label, prokinetic) | Low dose (e.g. 125-250 mg 3-4 times daily) before meals, per physician direction | Not established |
Enteric-coated/delayed-release tablets should generally be swallowed whole, not crushed or chewed. Erythromycin base and stearate salts are best absorbed on an empty stomach, while ethylsuccinate may be taken with food if GI upset occurs; follow product-specific labeling.
Side Effects of Erythromycin
Most side effects of Erythromycin are gastrointestinal and dose-related, reflecting its prokinetic activity.
- Common: abdominal pain/cramping, nausea, vomiting, diarrhea, epigastric discomfort.
- Less common: skin rash, urticaria, mild allergic reactions.
- Rare but serious: reversible cholestatic hepatitis/jaundice (especially with the estolate salt, more common with prolonged use), QT prolongation and ventricular arrhythmias (see Interactions/Precautions), reversible hearing loss (usually with high-dose or intravenous therapy), infantile hypertrophic pyloric stenosis in neonates exposed to Erythromycin, and Clostridioides difficile-associated diarrhea/pseudomembranous colitis.
- Very rare: anaphylaxis, Stevens-Johnson syndrome.
Seek medical attention promptly for severe or persistent diarrhea, yellowing of the skin/eyes, irregular heartbeat, or signs of an allergic reaction.
Contraindications of Erythromycin
Erythromycin is contraindicated in:
- Patients with known hypersensitivity to Erythromycin or other macrolide antibiotics.
- Concurrent use with drugs that cause serious cardiac arrhythmias when combined with Erythromycin due to CYP3A4 interaction and QT prolongation risk (e.g. terfenadine, astemizole, cisapride, pimozide).
- Concurrent use with ergot alkaloids (ergotamine, dihydroergotamine) due to risk of acute ergotism.
- Patients with a history of cholestatic jaundice or hepatic dysfunction associated with prior Erythromycin use.
- Concurrent use with certain HMG-CoA reductase inhibitors (lovastatin, simvastatin) due to rhabdomyolysis risk.
Frequently Asked Questions about Erythromycin
What is Erythromycin used for?
Erythromycin is a macrolide antibiotic used to treat bacterial infections of the respiratory tract, skin, and soft tissues, certain sexually transmitted infections, pertussis, and diphtheria, and is often used as an alternative in patients allergic to penicillin. At low doses it is also used off-label to help stomach emptying in certain motility disorders.
Can I take Erythromycin if I am pregnant?
Erythromycin should be used during pregnancy only if clearly needed and the potential benefit outweighs the potential risk to the fetus; a physician should be consulted first. The estolate salt form of Erythromycin should be avoided in pregnancy due to a risk of liver toxicity in the mother.
What are the common side effects of Erythromycin?
The most common side effects of Erythromycin are gastrointestinal, including nausea, vomiting, abdominal cramping, and diarrhea, related to its effect on gut motility. Less commonly, allergic skin reactions can occur.
Can Erythromycin affect my heart?
Yes. Erythromycin can prolong the QT interval and, rarely, cause serious irregular heart rhythms, especially when combined with certain other medications or in people with existing heart rhythm problems. Tell your doctor about all medicines you take and any heart conditions before starting Erythromycin.
Does Erythromycin interact with other medicines?
Yes, Erythromycin has several important drug interactions, including with certain statins, ergot medicines, blood thinners, digoxin, theophylline, and drugs that also prolong the QT interval. Always tell your physician or pharmacist about all medicines and supplements you are taking before starting Erythromycin.
How should I take Erythromycin?
Take Erythromycin exactly as prescribed by your physician, at evenly spaced intervals, and complete the full course even if you feel better. Do not stop, extend, skip doses, or share this medicine with others without medical advice.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.