Buy Eryc Online (Erythromycin)
What is Eryc?
What is Eryc?
Ery-Tab is a brand-name antibiotic used to treat a wide range of bacterial infections. It belongs to a group of medicines called macrolide antibiotics and contains the active ingredient erythromycin. Ery-Tab may be used for respiratory tract infections, skin infections, pertussis, diphtheria, syphilis, Legionnaires' disease, and other bacterial infections caused by susceptible bacteria. It is also used to prevent recurrent attacks of rheumatic fever in patients who have had an allergic reaction to penicillin or sulfa drugs.
Ery-Tab is available as enteric-coated delayed-release tablets designed to help reduce stomach irritation. It is important to use Ery-Tab exactly as prescribed to help prevent antibiotic resistance.
Order Eryc online today and save!
Purchase Eryc from Universal Drugstore today and save!
Select your dosage:
- All Strength's
- 250mg
- 333mg
Ery-Tab brand
Ery-Tab 333mg
Prescription RequiredCurrently Unavailable
Product of United States
Marketed as Ery Tab in United States.
Eryc brand
Eryc 250mg
Prescription RequiredProduct of Australia
Eryc 333mg
Prescription RequiredProduct of Canada
Erythromycin (generic Eryc)
Erythromycin 333mg
Prescription RequiredCurrently Unavailable
Product of Canada
Marketed as Apo-Erythro- E-C in Canada.
Don't see what you're looking for? Contact us
Important information about Eryc
The active ingredient in Ery-Tab is erythromycin.
Erythromycin is a macrolide antibiotic that works by interfering with bacterial protein production. It attaches to bacterial ribosomes and blocks the bacteria from making proteins needed for survival and growth. This action helps stop the spread of bacterial infections and allows the immune system to clear the infection. Ery-Tab is not effective against viral illnesses such as the common cold or flu.
Follow all directions given to you by your doctor and read all documents provided, including the full Prescribing Information, FDA-Approved Product Labeling, Instructions for Use, and Medication Guide before using Ery-Tab. However, the following is a synopsis of the general guidelines for the use of Ery-Tab:
- Take Ery-Tab exactly as prescribed by your healthcare provider.
- Swallow the delayed-release tablets whole with a full glass of water.
- Do not crush, chew, or break the enteric-coated tablets.
- Ery-Tab is usually taken on an empty stomach unless your healthcare provider advises otherwise.
- Take doses evenly throughout the day to maintain steady antibiotic levels.
- Continue taking the medication for the full treatment period, even if symptoms improve early.
- For a missed dose, take it as soon as you remember, unless it is close to the next dose. Do not double the next dose.
Some mild or common side effects of Ery-Tab include:
- Stomach pain.
- Nausea.
- Vomiting.
- Diarrhea.
- Loss of appetite.
- Mild skin rash.
- Headache.
- Temporary hearing loss with higher doses.
Some individuals may experience serious side effects while using Ery-Tab. These side effects may require immediate medical attention. If you experience any of the following, contact your healthcare provider or seek emergency medical help:
- Severe allergic reaction with hives or trouble breathing.
- Serious heart rhythm changes or QT prolongation.
- Liver problems, including jaundice (yellowing of the eyes/skin), dark urine, and severe abdominal pain.
- Hearing loss or ringing in the ears.
- Worsening symptoms of myasthenia gravis.
These are not all of the possible side effects of Ery-Tab. You should always seek medical advice from your healthcare provider for any questions or concerns about your medical condition or treatment. Read all patient information, medication guides, or drug information sheets that come with this medication. You can also report adverse effects to the Food and Drug Administration at www.fda.gov/medwatch or 1-800-FDA-1088.
Before starting Ery-Tab, it is crucial to discuss any existing health conditions with your healthcare provider. You should be sure that your healthcare provider is aware of all your medical conditions, including if you have:
- Heart rhythm disorders or QT prolongation.
- Low potassium or low magnesium levels.
- Liver disease or previous liver problems.
- Myasthenia gravis.
- Hearing problems.
- Kidney disease.
- A history of allergic reaction to macrolide antibiotics.
- Pregnancy or breastfeeding concerns.
Additional precautions include:
- Erythromycin may increase the risk of serious heart rhythm problems in some people.
- Using antibiotics when they are not needed may increase antibiotic resistance.
- Severe diarrhea can occur during or after treatment.
- Older adults may have a greater risk of heart-related side effects.
Ery-Tab should not be used in people with known allergy to erythromycin or other macrolide antibiotics. It is also contraindicated with certain medications that may cause dangerous heart rhythm changes or serious drug interactions, including cisapride, pimozide, ergotamine, and dihydroergotamine.
Some people may begin to feel better within a few days after starting Ery-Tab. However, it is important to complete the full course of treatment to fully clear the bacterial infection.
When Ery-Tab is taken with other prescription drugs, over-the-counter medications, vitamins, and supplements, it may change how they work or increase the frequency or severity of side effects. Make sure that you tell your healthcare professional about anything that you are taking to avoid any negative drug interactions, including:
- Statins such as simvastatin or lovastatin, because erythromycin may increase the risk of muscle injury.
- Digoxin, because erythromycin may increase digoxin levels.
- Carbamazepine or phenytoin, because erythromycin may increase blood levels of these medications.
- Quinidine, amiodarone, procainamide, dofetilide, or other medications that affect heart rhythm, because they may increase the risk of QT prolongation.
- Theophylline, because erythromycin may increase theophylline toxicity.
- Alprazolam, triazolam, or midazolam, because erythromycin may increase sedation effects.
- Cyclosporine, because erythromycin may raise cyclosporine levels.
- Bromocriptine, because erythromycin may increase side effects.
- Ergotamine or dihydroergotamine, because dangerous blood vessel problems may occur.
- Supplements containing magnesium or aluminum, because they may affect absorption.
Ery-Tab is an enteric-coated, delayed-release tablet available in the following strengths:
- 250 mg.
- 333 mg.
- 500 mg.
Dosing depends on the type and severity of the bacterial infection. Adults commonly take doses divided 2 to 4 times daily. Your healthcare provider will determine the correct dose and treatment duration.
Store Ery-Tab at room temperature away from moisture, heat, and direct light. Keep the medication in a tightly closed container and out of the reach of children or pets.
Ery-Tab is manufactured by Arbor Pharmaceuticals, LLC.
Yes. Generic erythromycin tablets are available. It is also available in other brand names such as E-Mycin, ERYC, PCE, PCE Dispertab, and Erythrocin.
Do not stop taking Ery-Tab without medical advice. Stopping treatment too early may allow the infection to return and may increase bacterial resistance.
Erythromycin may be used during pregnancy in certain situations when clearly needed. Your healthcare provider will determine whether treatment is appropriate.
Erythromycin passes into breast milk in small amounts. Your healthcare provider can discuss the benefits and possible risks of breastfeeding while on this medication.
Universal Drugstore Loyalty Rewards
Referral Rewards
Earn $50 by referring a friend to Universal Drug Store. $50 for you, and $50 for your friend.
Click to referLoyalty Rewards
Join our loyalty program, and earn loyalty reward points on each purchase to save even more.
Click to joinImportant information about buying Eryc from UniversalDrugstore™
We ship to destinations within the United States, including Alaska and Hawaii, as well as internationally. Delivery typically takes about 2 weeks for orders shipped within the U.S. and Canada, and about 4 weeks for international orders, depending on your location and customs processing.
Once you complete your order, we process, verify, and dispatch your medication. You’ll receive email updates at each stage, including tracking details once your order ships. If any additional documentation is needed (such as a valid prescription), we’ll contact you promptly. Once approved, your order is charged and delivered directly to your doorstep.
Orders are typically processed within 1–3 business days once all required documents are received and approved. Standard delivery times range from 10–18 business days, depending on your location.
Yes! Once your medication ships, you will receive an email with tracking information so you can monitor your shipment every step of the way.
Our Customer Care team is available 24/7 to assist with any order-related concerns or questions. If you experience delays, missing items, or need support, contact us using the details provided in your confirmation email.
All orders are shipped in discreet, plain packaging to protect your privacy. Medications are securely packaged to prevent damage and ensure they arrive in top condition.
Yes. We use cold-chain shipping methods to safely transport temperature-sensitive medications, ensuring they maintain proper storage conditions throughout delivery.
Shipping costs vary depending on your location and shipping method. Free shipping promotions may be available—check the checkout page for the latest offers. Orders above $100 going to a US destination will receive free shipping.
Currently, we do not bill Medicare or Medicaid directly. However, we provide detailed receipts and documentation that you can submit to your insurance provider for potential reimbursement.
Universal Drugstore does not bill private health insurance directly, but we provide a detailed invoice that you can submit to your insurer for possible reimbursement. Many insurers will accept Universal Drugstore’s documents, but if you have any questions, check with your insurance company prior to purchasing.
We use advanced SSL encryption and secure payment processing to ensure that all transactions are 100% protected against fraud and unauthorized access.
Universal Drugstore offers many generic alternatives that provide the same active ingredients at a lower cost. Search for your medication and compare pricing for generic vs. brand-name options. Generic availability depends on the medication.
If your medication requires a prescription, you must upload it online, via email, or fax. Over-the-counter (OTC) medications do not require a prescription. All prescription medication purchases require a valid and approved prescription. The Universal Drugstore customer care team can contact your doctor directly to get your prescription, and ensure all information is up to date.
Yes! You can add multiple medications to your cart, including prescription, OTC, and pet medications, and complete your purchase in a single checkout process.
Yes! If your prescription includes refills, you can reorder quickly by logging into your account and selecting your medication for a hassle-free refill process. Always refill your medication proactively and ontime, to ensure you do not run out of important medication.
Yes! We offer:
- Up to 80% savings on medications
- Price match guarantee – we’ll match competitor pricing on qualifying medications
- 10% off your first order for new customers
We offer 24/7 customer support via phone, email, and chat. Visit our Contact Us page for assistance with ordering, shipping, or medication questions.
Related Conditions
Medical Disclaimer
The information, including but not limited to, text, graphics, images and other material contained on this website are for informational purposes to increase health awareness only. No material on this site is intended to be a substitute for professional medical advice, diagnosis or treatment.
Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment and before undertaking a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Jamie Winn, PharmD, is a licensed pharmacist and seasoned medical content reviewer with over 20 years of experience in clinical pharmacy, patient care, and healthcare leadership.
View Jamie's Profile
Shirley is a Medical Writer and first-year Doctor of Pharmacy (PharmD) student at the University of Alberta, where she is building on her strong foundation in health sciences and patient care.
View Shirley's Profile