erythromycin
Brand names: E-Mycin, Ery-Tab
Erythromycin Topical Solution is a medicine that you put on your skin to treat acne. It contains an antibiotic to help clear up your skin.
Drug Pricing (NADAC)
Generic Price
$2.87/unit
Generic Available
Yes (26 manufacturers)
Pricing data from NADAC (CMS), effective December 18, 2024. Compare all drug costs →
What it does
Erythromycin Topical Solution treats acne vulgaris.
Common side effects
Peeling, Dryness, Itching
Key warnings
You should not use this medicine if you are allergic to any of its ingredients.
How It Works
Erythromycin is a macrolide antibiotic. It works by stopping the growth of bacteria. This helps to reduce inflammation and clear up acne.
How to Take It
Wash the skin with soap and warm water, then pat dry. Apply the solution to affected areas twice daily, once in the morning and once in the evening. Use the applicator top to apply the medicine. If you use your fingertips, wash your hands afterward. If your skin gets too dry or starts to peel, apply it less often.
Pregnancy & Breastfeeding
It is not known if erythromycin topical solution can harm an unborn baby. Talk to your doctor if you are pregnant or breastfeeding.
Missed Dose
Apply the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule.
Storage
Store in a dry place at room temperature, between 68 to 77°F.
Side Effects (from patient reports)
Based on 13,414 FDA adverse event reports.
FDA Adverse Event Report Analysis
Detailed analysis of 18,237 reports from the FDA Adverse Event Reporting System (FAERS). Reports span 2003–2025.
Total Reports
18,237
Death-Related Reports
1,606
Hospitalization Reports
4,825
Top Indication
Product Used For Unknown Indication
Gender Distribution
Age Distribution
Most Reported Adverse Reactions (FAERS)
| # | Reaction | Reports |
|---|---|---|
| 1 | DRUG HYPERSENSITIVITY | 4,088 |
| 2 | NAUSEA | 1,271 |
| 3 | VOMITING | 1,121 |
| 4 | DIARRHOEA | 1,069 |
| 5 | DRUG INEFFECTIVE | 1,044 |
| 6 | DYSPNOEA | 1,023 |
| 7 | FATIGUE | 1,012 |
| 8 | RASH | 1,007 |
| 9 | OFF LABEL USE | 914 |
| 10 | HEADACHE | 866 |
| 11 | PAIN | 779 |
| 12 | DIZZINESS | 777 |
| 13 | PYREXIA | 689 |
| 14 | MALAISE | 686 |
| 15 | HYPERSENSITIVITY | 677 |
Reactions in Death Reports
Reactions in Hospitalization Reports
Source: FDA FAERS (Adverse Event Reporting System) FDA FAERS (Adverse Event Reporting System) Reports are voluntary and do not establish causation
Serious Warnings
You should not use this medicine if you are allergic to any of its ingredients.
Known Drug Interactions
7 DRUG INTERACTIONS • CYP3A Inhibitors: In post-MI HFrEF patients, do not exceed 25 mg once daily when used with moderate CYP3A inhibitors (e.g., verapamil, erythromycin, saquinavir, fluconazole).
Mechanism: Erythromycin blocks the proteins that break down eplerenone, leading to more of the drug staying in your body.
What to do: If you are taking erythromycin, your daily dose of eplerenone should not exceed 25 mg.
Erythromycin Clinical Impact: Erythromycin significantly increases pitavastatin exposure and increases the risk of myopathy and rhabdomyolysis. Intervention: In patients taking erythromycin, do not exceed pitavastatin tablets 1 mg once daily [see Dosage and Administration ( 2.4 )].
Mechanism: Erythromycin slows down how the body processes pitavastatin, which leads to higher amounts of the drug in your system. Having too much pitavastatin in the blood can cause severe muscle breakdown.
What to do: If you must take both drugs, your doctor should limit your pitavastatin dose to no more than 1 mg once daily.
Dose adjustment is not recommended for risperidone tablets when co-administered with ranitidine, cimetidine, amitriptyline, or erythromycin [see Table 18 ] . Do not exceed twice the patient’s usual dose Enzyme (CYP3A) inhibitors Ranitidine 150 mg twice daily 1 mg single dose 1.2 1.4 Dose adjustment not needed Cimetidine 400 mg twice daily 1 mg single dose 1.1 1.3 Dose adjustment not needed Erythromycin 500 mg four times daily 1 mg single dose 1.1 0.94 Dose adjustment not needed Other Drugs Amitriptyline 50 mg twice daily 3 mg twice daily 1.2 1.1 Dose adjustment not Needed *Change relative t...
Mechanism: Erythromycin can slightly change how your body processes risperidone, but the effect is too small to matter.
What to do: You do not need to change your dose of risperidone when taking this antibiotic.
7 DRUG INTERACTIONS Sildenafil can potentiate the hypotensive effects of nitrates, alpha blockers, and anti-hypertensives ( 4.1 , 5.5 , 7.1 , 7.2 , 7.3 , 12.2 ) With concomitant use of alpha blockers, initiate sildenafil at 25 mg dose ( 2.3 ) CYP3A4 inhibitors (e.g., ritonavir, ketoconazole, itraconazole, erythromycin): Increase sildenafil exposure ( 2.4 , 7.4 , 12.3 ) Ritonavir: Do not exceed a maximum single dose of 25 mg in a 48 hour period ( 2.4 , 5.6 ) Erythromycin or strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, saquinavir): Consider a starting dose of 25 mg ( 2.4 , 7.4 ...
Mechanism: Erythromycin prevents your body from processing sildenafil normally, which increases the amount of medicine in your blood.
What to do: Your doctor should consider starting you on a lower dose of 25 mg of sildenafil.
Therefore, avoid concomitant use of XENLETA Injection and XENLETA Tablets with such drugs (for example, Class IA and III antiarrhythmics, antipsychotics, erythromycin, moxifloxacin, tricyclic antidepressants).
Mechanism: These two drugs can both interfere with the electrical signals that control your heartbeat. Using them at the same time makes a dangerous heart rhythm more likely.
What to do: You should avoid taking these two drugs together. Ask your doctor for a different antibiotic that does not carry this risk.
Common Questions
What is the strength of this medicine?
How often should I apply this solution?
Can I use this on my whole body?
What should I do if my skin gets too dry?
Can this medicine cause irritation?
What should I do if I get a rash?
Can I use other acne treatments with this?
How long will it take to see results?
Is this medicine safe for children?
What are the ingredients in this solution?
What are the common side effects of erythromycin?
Does erythromycin interact with other medications?
What drug class is erythromycin?
Is erythromycin safe during pregnancy?
Has erythromycin been recalled?
Active Recalls
CGMP Deviations:
Akorn, Inc.
CGMP Deviations: all products within expiry are being recalled because the manufacturing firm, Teligent Pharma, Inc.is discontinuing its stability study program.
McKesson Corporation dba McKesson Drug Company
Related Medications in Macrolide Antibiotic
Other drugs grouped near erythromycin — same-class peers and common alternatives.
amikacin
Amikin
Amikacin is an antibiotic medicine.
Compare with erythromycin →
amoxicillin
Amoxil
Amoxicillin and Clavulanate Potassium is a combination medicine used to fight bacterial infections.
Compare with erythromycin →
amoxicillin/clavulanate
Augmentin
Augmentin is a combination of two medicines, amoxicillin and clavulanate.
Compare with erythromycin →
ampicillin/sulbactam
Unasyn
Unasyn is a combination of two antibiotics that fights bacteria in your body.
Compare with erythromycin →
azithromycin
Zithromax, Z-Pack
Azithromycin is an antibiotic that fights bacteria.
Compare with erythromycin →
Medication Guides
Understanding Drug Interactions
How CYP450 enzymes, inhibitors, and inducers affect your medications
Generic vs Brand Name Drugs
FDA requirements, cost savings, and when the difference matters
Narrow Therapeutic Index Drugs
Why some drugs demand precise dosing and monitoring
Common Drug Interactions
Dangerous medication combinations and how to protect yourself
Related Health & Safety Data
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What the FDA Data Shows for erythromycin
The FDA label for erythromycin (sold under brand names such as E-Mycin, Ery-Tab) classifies it as a prescription-only medication in the Macrolide Antibiotic class. Erythromycin Topical Solution treats acne vulgaris. Official labeling lists 5 commonly reported side effects, including Peeling, Dryness, Itching.
Post-market surveillance from the FDA Adverse Event Reporting System (FAERS) captures real-world experience. For this drug, FAERS contains 13,414 voluntary reports. The database also lists 63 documented drug interactions derived from FDA labeling, with the top-flagged interaction rated major severity. NADAC pricing from CMS shows a generic unit cost of $2.87.
Report counts do not establish causation — a FAERS entry documents a temporal association, not proof that the drug produced the outcome. Widely prescribed medications naturally accumulate more reports than niche therapies, so raw totals must be interpreted alongside total exposure. Shortage status, recall history (currently 2 recall records on file), and patent information further shape supply and switching decisions. This page summarizes public FDA data for educational purposes only and is not a substitute for professional medical advice — always consult a licensed healthcare provider before starting, stopping, or changing any medication.
Data Sources
Drug labeling: FDA Drug Labels (SPL/DailyMed). Adverse events: FDA Adverse Event Reporting System (FAERS). Pricing: CMS National Average Drug Acquisition Cost (NADAC).
FAERS reports are voluntary and do not establish causation. Drug interactions are derived from FDA labeling and clinical references. Always consult a healthcare professional before making medication decisions.
Last updated: October 11, 2024
Read our methodology — how this data is sourced, computed, and verified.
All federal data sources used on this page
- FDA Orange Book — approved drug products with therapeutic equivalence. accessdata.fda.gov/cder/ob
- FDA DailyMed — NIH-hosted drug labeling for FDA-approved meds. dailymed.nlm.nih.gov
- FDA Adverse Event Reporting System (FAERS) — post-marketing safety surveillance. fda.gov/drugs/faers
- NLM RxNorm — standardized clinical drug nomenclature. nlm.nih.gov/research/umls/rxnorm
- CMS Medicare Part B Drug Average Sales Price Files — federal drug pricing data. cms.gov/medicare/part-b-drugs/asp
- FDA Drug Shortages Database — current and resolved drug shortage tracking. accessdata.fda.gov/drugshortages