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Erythromycin

Erythromycin (brand names include: Erycin / Eromax / Acnesol / Agrocin / Robimycin / E-Mycin / E.E.S. Granules / Filmtab / Eryc / Erypar / Eryped / Erythrocin / Erythrocot / E-Base / Erythroped / Ilosone / MY-E / Pediamycin / Zineryt / Abboticin / Abboticin-ES / Stiemycine / Acnasol / Tiloryth) is a broad-spectrum macrolide antibiotic.

Other names for this medication:
Eltocin, Ilosone, Pediazole

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Also known as:  Ilosone.

Description

Erythromycin is a prescription medication used to treat infections caused by bacteria. Erythromycin belongs to a group of drugs called macrolide antibiotics. These work by killing or stopping the growth of the bacteria that cause infections. This medication comes in capsule, tablet, long-acting capsule, long-acting tablet, chewable tablet, suspension, and pediatric drop forms for oral use. It is usually taken 3 to 4 times daily.

This medication also comes in topical solution and gel forms and as an ophthalmic ointment. Do not chew, divide, or break the long-acting capsules and tablets. Swallow these whole and take with a full glass of water. This medication is also available in an injectable form to be given directly into a vein (IV) by a healthcare professional. Common side effects of Erythromycin include stomach upset, diarrhea, vomiting, stomach cramps, mild skin rash, and stomach pain. Ophthalmic Erythromycin can also cause blurred vision. Do not drive or operate heavy machinery until you know how Erythromycin affects you.

Dosage

Patients should be counseled that antibacterial drugs including Erythromycin Tablets should only be used to treat bacterial infections. They do not treat viral infections (e.g., the common cold). When Erythromycin Tablets are prescribed to treat a bacterial infection, patients should be told that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by Erythromycin Tablets or other antibacterial drugs in the future.

Diarrhea is a common problem caused by antibiotics which usually ends when the antibiotic is discontinued. Sometimes after starting treatment with antibiotics, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after having taken the last dose of the antibiotic. If this occurs, patients should contact their physician as soon as possible.

Overdose

In case of overdosage, Erythromycin should be discontinued. Overdosage should be handled with the prompt elimination of unabsorbed drug and all other appropriate measures should be instituted.

Erythromycin is not removed by peritoneal dialysis or hemodialysis.

Storage

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) away from heat, moisture, and direct light. Keep from freezing. Keep container tightly closed. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Erythromycin are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.

Contraindications

Prescribing Erythromycin Tablets in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

Since Erythromycin is principally excreted by the liver, caution should be exercised when Erythromycin is administered to patients with impaired hepatic function.

Exacerbation of symptoms of myasthenia gravis and new onset of symptoms of myasthenic syndrome has been reported in patients receiving Erythromycin therapy.

There have been reports of infantile hypertrophic pyloric stenosis (IHPS) occurring in infants following Erythromycin therapy. In one cohort of 157 newborns who were given Erythromycin for pertussis prophylaxis, seven neonates (5%) developed symptoms of non-bilious vomiting or irritability with feeding and were subsequently diagnosed as having IHPS requiring surgical pyloromyotomy. A possible dose-response effect was described with an absolute risk of IHPS of 5.1% for infants who took Erythromycin for 8 to 14 days and 10% for infants who took Erythromycin for 15 to 21 days.5 Since Erythromycin may be used in the treatment of conditions in infants which are associated with significant mortality or morbidity (such as pertussis or neonatal Chlamydia trachomatis infections), the benefit of Erythromycin therapy needs to be weighed against the potential risk of developing IHPS. Parents should be informed to contact their physician if vomiting or irritability with feeding occurs.

Prolonged or repeated use of Erythromycin may result in an overgrowth of nonsusceptible bacteria or fungi. If superinfection occurs, Erythromycin should be discontinued and appropriate therapy instituted.

When indicated, incision and drainage or other surgical procedures should be performed in conjunction with antibiotic therapy.

Observational studies in humans have reported cardiovascular malformations after exposure to drug products containing Erythromycin during early pregnancy.

erythromycin antibiotic class

The erythromycins are broadly reviewed from a clinical viewpoint. The antimicrobial spectrum, clinical indications, pharmacokinetics and toxicity are dealt with. The usefulness of erythromycin for respiratory tract infections is stressed. New evidence to support bactericidal activity of this antibiotic is noted. There seems little reason to use the potentially hepatotoxic estolate form of erythromycin. The safety of the other forms of this antibiotic available in this country is emphasized.

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An unusual cause of a cholescintigraphic, false-positive, erythromycin-induced hepatotoxicity is presented. This occurred in the presence of preservation of hepatic uptake and the normal appearance of gut activity. Serial scintigraphy and serum chemistries documented underlying gallbladder normalcy.

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Three to four review authors independently extracted data and assessed the quality of each trial.

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Using prescription-event monitoring to determine whether erythromycin estolate was a more frequent cause of jaundice than erythromycin stearate or tetracycline 12 208 patients, for whom 5343 doctors had prescribed one of the three drugs, were identified by the Prescription Pricing Authority. Of the questionnaires sent to general practitioners about the possible occurrence of jaundice, 76% were returned. There were 16 reports of jaundice, of which four were attributable to gall stones, three to cancer, six to viral hepatitis, and only three were possibly related to an antibiotic. All three patients, in whom the antibiotic was a possible cause, had been treated with erythromycin stearate. No case was attributable to the estolate which had previously been suspected of being a more frequent cause of jaundice. Although the incidence is unknown, it is very unlikely to be more than one in 100.

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Thirty-nine pregnant women admitted for therapeutic abortions during early or mid pregnancy were given erythromycin estolate, erythromycin base, or clindamycin hydrochloride orally in single or multiple doses. Peak serum levels of clindamycin were 3.4 to 9.0 mug/ml following a single dose of 450 mg, whereas peak serum levels of erythromycin were 0.29 to 7.2 mug/ml following 500 mg in a single dose. The individual variability of serum concentrations of erythromycin was greater than that reported in normal men and nonpregnant women, whereas the serum levels of clindamycin were rather uniform, and similar to what has been reported in nonpregnant individuals. Following multiple doses of each antibiotic, high serum levels were obtained in virtually all subjects, and urine levels were also higher. Following single doses the mean urinary recovery was 2% for erythromycin and 16.8% for clindamycin.

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Erythromycin and some other macrolide antibiotics can first induce a cytochrome P-450 isozyme similar to the one induced in rats by pregnenolone-16 alpha-carbonitrile and then inhibit it by forming a stable cytochrome P-450-metabolite complex. The purpose of this study was to compare azithromycin, a novel 15-membered ring azalide, and erythromycin estolate for the potential to cause hepatic microsomal enzyme induction and inhibition in Sprague-Dawley rats. The daily oral administration of 800 mg of erythromycin estolate per kg for 7 days resulted in statistically significant elevations of NADPH-cytochrome c reductase, erythromycin N-demethylase (3.2-fold), and total cytochrome P-450 content. Approximately 40% of cytochrome P-450 was complexed with erythromycin metabolite. In contrast, the daily administration of 200 mg of azithromycin per kg for 7 days caused significant elevations of N-demethylase (2.5-fold) only and did not produce any increases in total cytochrome P-450 content or NADPH-cytochrome c reductase. No complexed cytochrome P-450 was detected in the azithromycin-dosed rats despite liver concentrations of azithromycin that were 118 times greater than the liver concentrations of erythromycin estolate in erythromycin estolate-dosed rats. Although the short-term oral administration of azithromycin produced hepatic accumulation of the drug and elevated azithromycin demethylase activity, there was no other evidence of hepatic cytochrome P-450 induction or inactivation via cytochrome-metabolite complex formation. In contrast to erythromycin estolate, azithromycin is not expected to inhibit its own metabolism or that of other drugs via this pathway.

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The efficacy of erythromycin was assessed in the treatment of 14 children aged 4 to 13 years with refractory chronic constipation, and presenting megarectum and fecal impaction. A double-blind, placebo- controlled, crossover study was conducted at the Pediatric Gastroenterology Outpatient Clinic of the University Hospital. The patients were randomized to receive placebo for 4 weeks followed by erythromycin estolate, 20 mg kg-1 day-1, divided into four oral doses for another 4 weeks, or vice versa. Patient outcome was assessed according to a clinical score from 12 (most severe clinical condition) to 0 (complete recovery). At enrollment in the study and on the occasion of follow-up medical visits at two-week intervals, patient score and laxative requirements were recorded. During the first 30 days, the mean SD clinical score for the erythromycin group (N = 6) decreased from 8.2+/-2.3 to 2.2+/-1.0 while the score for the placebo group (N = 8) decreased from 7.8+/-2.1 to 2.9+/-2.8. During the second crossover phase, the score for patients on erythromycin ranged from 2.9+/-2.8 to 2.4+/-2.1 and the score for the patients on placebo worsened from 2.2+/-1.0 to 4.3+/-2.3. There was a significant improvement in score when patients were on erythromycin (P < 0.01). Mean laxative requirement was lower when patients ingested erythromycin (P < 0.05). No erythromycin-related side effects occurred. Erythromycin was useful in this group of severely constipated children. A larger trial is needed to fully ascertain the prokinetic efficacy of this drug as an adjunct in the treatment of severe constipation in children.

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Of 456 patients enrolled during 17 consecutive months, 420 were evaluable. Clinical success at Study Days 15 to 19 was 94.6% in the azithromycin group and 96.2% in the comparative treatment group (P = 0.735) and at 4 to 6 weeks posttherapy 90.6 and 87.1%, respectively (P = 0.330). Evidence of infection was identified in 46% of 420 evaluable patients (1.9% bacteria, 29.5% M. pneumoniae and 15% C. pneumoniae). Microbiologic eradication was 81% for C. pneumoniae and 100% for M. pneumoniae in the azithromycin group vs. 100 and 57%, respectively, in the comparator group. Treatment-related adverse events occurred in 11.3% of the azithromycin group and 31% in the comparator group (P < 0.05).

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erythromycin ophthalmic ointment dosage 2015-05-25

A belief Hiconcil 500 Mg that brand oral liquid medications taste better than their generic counterparts may influence prescribing habits among pediatricians.

erythromycin ethylsuccinate oral suspension usp 2016-10-19

Comparison of serum antibacterial activity against a beta-hemolytic streptococcus and a penicillin-resistant staphylococcus was made in a cross-over study in volunteers after ingestion of oral suspensions and capsules of triacetyloleandomycin and erythromycin estolate. Oral suspensions yielded earlier peak titers, but ultimate peak titers and duration of activity were similar to those observed after ingestion of capsules. Antibacterial activity of serum against both organisms was consistently greater with both erythromycin estolate preparations than with the triacetyloleandomycin preparations. These in vitro data were comparable Bactropin 40 Mg to observations made previously in monkeys infected with the same organisms, although comparative clinical efficacy in monkeys did not reflect these implied therapeutic differences.

erythromycin topical gel usp 2 uses 2017-01-30

A 53-year-old housewife who had developed severe cholestatic hepatitis following the administration of erythromycin estolate therapy two-and-a-half years previously, was studied by an in vitro "challenge" test in which peripheral venous lymphocytes were cultured in Clindamicina Gel Para Q Sirve the presence of erythromycin estolate, erythromycin stearate and erythromycin base. Evidence of blastogenesis was observed in response to erythromycin estolate, but not to erythromycin stearate of erythromycin base. This test thus provided evidence that the patient was "sensitized" to erythromycin estolate without exposing her to the risk of in vivo challenge. Furthermore, in contrast to previous studies, the findings provide evidence that erythromycin estolate jaundice is mediated by immunological mechanisms.

erythromycin 250 mg price 2015-07-27

The pharmacokinetic parameters of erythromycin in foals were determined following intravenous administration of 5.0 mg/kg to animals aged 1, 3, 5 and 7 weeks. The distribution of the drug was described by a two-compartment open model, and no significant differences were observed between coefficients on which the parameters were based. Pharmacokinetic values Klindan 600 Mg were also determined for four mares given 5.0 mg/kg intravenously and for six 10-12-week-old foals given 20.0 mg/kg intravenously. The half-life of erythromycin for all groups of animals (foals less than 7 weeks, mares, foals 10-12 weeks) was 1.0-1.1 h; the apparent volume of distribution was between 2.3 and 7.2 l/kg, and the clearance of the drug from the body was between 1.9 and 5.0 mg/kg/h. No drug could be detected in the serum following oral administration of 5.0 mg/kg erythromycin estolate; detectable levels were found for 5 h in mares given 12.5 mg/kg, and for 8 h in foals given 20.0 mg/kg orally. Peak levels in foals given the drug orally were 0.42 micrograms/ml at 120 min after administration. Foals given 10.0 mg/kg of erythromycin base intramuscularly had serum concentrations detectable 12 h later; the peak level achieved was 1.44 micrograms/ml serum 90 min after administration and concentrations exceeded 0.25 micrograms/ml for 6 h. In the mares the milk concentrations were approximately twice those in serum. Recommendations were made for drug dosage to be used in the treatment of Corynebacterium equi pneumonia of foals.

erythromycin ointment eye infection 2016-08-07

Previous work showed a higher prevalence of macrolide/azalide resistance in provinces of Canada where azithromycin was the major treatment for Streptococcus pneumoniae as compared with regions where clarithromycin was the dominant treatment. These data provided a way to test the mutant selection window hypothesis, Tetracycline Online which predicts that the serum drug concentration (AUC(24)) relative to the mutant prevention concentration (MPC) would be higher for clarithromycin than for azithromycin.

erythromycin benzoyl peroxide topical gel over the counter 2017-10-02

The effects of some macrolides (4 mmoles . kg-1 p.o. daily for 4 days in vivo; 0.3 mM in vitro) on hepatic drug-metabolizing enzymes in rats were compared. One group of macrolides including previously studied compounds (oleandomycin, erythromycin and troleandomycin), as well as several other erythromycin derivatives, showed induction of microsomal enzymes and formation of inactive cytochrome P-450-metabolite complexes in vivo; this formation increased in the order: oleandomycin, erythromycin ethylsuccinate, erythromycin stearate, erythromycin itself, erythromycin propionate, erythromycin estolate and troleandomycin. Troleandomycin and, to a lesser extent, erythromycin and oleandomycin formed cytochrome P-450-metabolite complexes when incubated in vitro with 1 mM NADPH and microsomes from rats pretreated with troleandomycin or phenobarbital, but not with microsomes from control rats or rats treated with 3-methylcholanthrene. In contrast, two other macrolides, josamycin and midecamycin, showed no induction of microsomal enzymes and no detectable formation of cytochrome P-450-metabolite complexes in vivo. In vitro, these macrolides failed to form detectable complexes even with microsomes from rats pretreated with troleandomycin or phenobarbital. Hexobarbital sleeping time was unaffected by preadministration of josamycin or midecamycin (4 mmoles . kg-1 p.o.) 2 hr earlier; the in vitro activity of hexobarbital hydroxylase was not inhibited by 0.3 mM josamycin or midecamycin. We conclude that, unlike several erythromycin derivatives, josamycin Amoxihexal 1000 Mg Beipackzettel and midecamycin do not form inactive cytochrome P-450-metabolite complexes in rats.

erythromycin 250 mg side effects 2016-09-16

Conjunctival and nasopharyngeal cultures for Chlamydia trachomatis were obtained from infants 30 days of age or younger with purulent conjunctivitis. Conjunctival specimens were also tested for other bacterial pathogens and for viruses. Most of the infants studied were black and came from a low-income, urban population. By random assignment infants received either topical treatment with 10% sulfacetamide sodium ophthalmic solution or systemic treatment with oral Azitrox Alcohol erythromycin estolate (50 mg/kg/day). Treatment was continued for 14 days if C trachomatis was isolated from the conjunctivae. Treatment was considered to be effective if conjunctivitis resolved and if follow-up chlamydial cultures of the conjunctivae and nasopharynx were negative at completion of therapy and two to four weeks later. Chlamydia trachomatis was isolated in the absence of other pathogens from the eyes of 37 (73%) of 51 infants with conjunctivitis. Other bacterial pathogens were isolated from four infants (8%) and viruses from none. Chlamydial infection was eradicated from 14 (93%) of 15 infants treated orally. In contrast, persistent conjunctival infection was detected in eight infants (57%) and nasopharyngeal colonization in three (21%) of 14 infants after topical treatment. It was concluded that C trachomatis is the most frequent cause of neonatal conjunctivitis in the low-income, urban population studied; that erythromycin estolate administered orally for 14 days eradicates chlamydial conjunctival and nasopharyngeal infection; and that topical sulfacetamide therapy may result in persistent conjunctival infection and nasopharyngeal colonization.

erythromycin topical gel acne reviews 2016-07-08

Ambulatory patients with CAP were identified at either the Children's Medical Center of Dallas, Texas or the Hospital del Niño of Panama City, Panama. Children 6 months to 15 years of age were enrolled and randomized to receive either AZM for 5 days or a 10 day course of either A-C or EE, for those younger or older than 5 years of age, respectively. Mycoplasma pneumoniae and C. pneumoniae were identified by measuring acute and convalescent serum antibody titers and by performing nasopharyngeal (NP Sulfamethoxazole Tmp Ds Tablet ) and oropharyngeal (OP) swabs for culture and polymerase chain reaction (PCR) testing.