• Bacterial infections

Eryc Generic Name & Formulations

General Description

Erythromycin (as base) 250mg; e-c pellets in caps.

Pharmacological Class


How Supplied



Eryc Indications


Treatment of susceptible infections including upper and lower respiratory, skin and skin structure, genitourinary, Legionnaires' disease, pertussis, listeriosis. Prophylaxis for rheumatic fever attacks in penicillin-allergic patients.

Eryc Dosage and Administration


Give 1hr before meals. Usual dose: 250mg every 6hrs or 500mg every 12hrs; max 4g/day (1g/day for twice daily dosing). Legionnaires: 1–4g/day in divided doses. Prophylaxis: 250mg twice daily. See full labeling.


Give 1hr before meals. Usual dose: 30–50mg/kg/day in divided doses; may double dose in severe infections. See full labeling.

Eryc Contraindications


Concomitant terfenadine, astemizole, cisapride, pimozide, ergotamine, dihydroergotamine, statins (eg, lovastatin, simvastatin).

Eryc Boxed Warnings

Not Applicable

Eryc Warnings/Precautions


Avoid in proarrhythmic conditions (eg, uncorrected hypokalemia or hypomagnesemia, clinically significant bradycardia); risk of QT prolongation. Myasthenia gravis. Hepatic impairment. Elderly. Infants: risk of infantile hypertrophic pyloric stenosis; monitor for vomiting or irritability with feeding. Pregnancy (Cat.B). Nursing mothers.

Eryc Pharmacokinetics

See Literature

Eryc Interactions


See Contraindications. May potentiate theophylline (reduce dose of theophylline), digoxin, oral anticoagulants, hexobarbital, phenytoin, valproate. May potentiate CYP3A substrates (eg, triazolam, midazolam, statins [rhabdomyolysis], sildenafil [reduce dose of sildenafil], colchicine [reduce starting dose of colchicine, max dose should be lowered; monitor], verapamil, amlodipine, diltiazem, carbamazepine, cyclosporine, tacrolimus, alfentanil, disopyramide, bromocriptine, rifabutin, quinidine, methylprednisolone, cilostazol, vinblastine); consider dose adjustments and monitor. May be antagonized by theophylline. Hypotension, bradyarrhythmias, lactic acidosis with verapamil. QT prolongation with concomitant Class 1A (quinidine, procainamide) or Class III (dofetilide, amiodarone, sotalol) antiarrhythmics; avoid. May interfere with fluorometric detection of urinary catecholamines.

Eryc Adverse Reactions

Adverse Reactions

GI upset, abdominal pain, anorexia, hepatic dysfunction; QT prolongation, C. difficile-associated diarrhea, superinfection (discontinue if occurs).

Eryc Clinical Trials

See Literature

Eryc Note

Not Applicable

Eryc Patient Counseling

See Literature