ErythromycinPrices, Coupons & Savings

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*Based on the difference between the U&C price submitted and the price the patient paid, as of April 2023.

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  2. Erythromycin
    Generic for Ilotycin
    3.5g tube of ointments $13.64 USD
    Save $7.25
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Save up to 90% of your branded or generic medications using the Now Patient Rx Advantage Card

Do you need a prescription for erythromycin?

Yes, erythromycin is only available with a valid physician Rx.

How much is erythromycin without Insurance in the US?

Our website gives two competitive savings options to US customers who wish to purchase erythromycin, as either a brand or generic, if available. The first is access to medications through our mail-order online pharmacy. The second is by using the Now Patient Rx Advantage Card, which can be used in over 65,000 pharmacies nationwide, across America. If you are insured, then in most cases, the cash price will be significantly cheaper than the copay.

What will my out-of-pocket cost be for erythromycin in the US?

There are no out-of-pocket (OOP) costs because we are currently only offering a cash-based option to purchase medications.

Is Now Patient a erythromycin savings card?

Yes. Save up to 90% on your erythromycin with the FREE Now Patient Rx Advantage card*.
*Based on the difference between the U&C submitted by the pharmacy and the price the patients pay.

Can you handle Rx transfers for home delivery in the US?

Yes. If you use the mail-order online pharmacy option, then we can handle requests by you to have your prescription transferred to our pharmacy for home delivery. We can even help you manage your refills by giving you timely reminders, so you do not run out of your medication.

Is Now Patient a erythromycin coupon provider in the US?

No. Now Patient does not provide erythromycin coupons or FREE erythromycin samples.

Do you accept commercial, Medicare or Medicaid coverage for erythromycin in the US?

No. Currently, we only offer cash-based options for purchase, therefore we do not require your insurance benefit details. In the future, our plan is to be able to handle commercial insurance, Medicare and Medicaid including cases where you have multiple health plans that provide benefit coverage (e.g. Medicaid and Commercial). We also anticipate being able to handle more complex scenarios such as using primary insurance combined with a manufacturer copay assistance program.

Does Now Patient work with Medicare?

Our cash-based prices for medications are typically cheaper than Medicare copays. We do not bill Medicare Part D (standalone drug coverage) or Medicare Advantage (combined health and drug coverage). When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

Does Now Patient work with Commercial Insurance?

Our cash-based prices for medications are typically cheaper than commercial plan copays. We do not bill your commercial plan. When you purchase your medication from Now Patient, you will be doing so out of your pocket. The spend will not count towards your plan deductibles or gaps.

What should you do if you use too much erythromycin?


Call your doctor right away or seek immediate medical attention if your symptoms do not improve or they become worse after using erythromycin. You can also call 800-222-1222 to reach the American Association of Poison Control Centers or use its online resource if you think you’ve used too much erythromycin. But if you have severe symptoms, call 911 (or your local emergency number) immediately or go to the nearest emergency room.


If you think it is an emergency, call 999 or find your nearest A&E
If you need help now, but it’s not an emergency go to 111.nhs.uk or call 111. Alternatively you can speak to one of our pharmacists or use the Now Patient app to make an appointment with your GP.

What should I do if I miss my dose?

There are occasions when people forget to take their medication at correct prescribed times. This may not only have an effect on potentially making the medication less effective but it may also inadvertently lead to taking doses too close together, thereby increasing the risks of side effects.

Click here to find out what to do if you forgot to take your medication

What is generic erythromycin?

FDA approval of erythromycin

Erythromycin is approved by the U.S. Food and Drug Administration (FDA) for medical use.

US brand name of erythromycin

Erythromycin is available under various brand names, including E.E.S., Ery-Tab, Erythrocin, and and Erythrocin Stearate. These brands are manufactured by different pharmaceutical companies.

UK brand name of erythromycin

In the UK, erythromycin is available under the brand names Erymax, Erythrocin, and Erythroped These brands are manufactured by different pharmaceutical companies.

Availability of erythromycin

Erythromycin is available as a prescription medication and is not available over-the-counter (OTC).

NHS prescription (UK) for erythromycin

Erythromycin is available in the UK with an NHS prescription.

FDA approval erythromycin

Erythromycin has been approved by the U.S. Food and Drug Administration (FDA) for the treatment of various bacterial infections, including respiratory tract infections, skin and soft tissue infections, and certain sexually transmitted diseases.

Conditions treated by erythromycin

Erythromycin is used for the treatment of various bacterial infections. This includes respiratory tract infections, skin infections, chlamydia and syphilis.

Mechanism of action

Erythromycin belongs to the class of drugs known as macrolide antibiotics. It works by inhibiting the growth and multiplication of bacteria, thereby stopping the spread of infection.

Warnings and precautions for erythromycin

  • Allergic reactions: If you are allergic to erythromycin or other macrolide antibiotics, inform your healthcare provider
  • Tell your doctor if you have low blood levels of magnesium or potassium before starting treatment
  • Liver problems: Erythromycin may cause liver toxicity in some individuals, especially those with pre-existing liver disease
  • QT prolongation: Erythromycin can prolong the QT interval of the heart, which may lead to a serious irregular heartbeat. Inform your healthcare provider if you have a history of heart problems or if you are taking other medications that can also prolong the QT interval

Forms of erythromycin

Erythromycin is available as enteric-coated tablets and capsules, non enteric-coated tablets and capsules, slow-release capsules, ophthalmic solutions, ointments, gels, oral suspensions, and injections.

Dosage of erythromycin

The dosage of erythromycin may vary depending on the type and severity of the infection. It is important to follow the instructions provided by your healthcare provider.

Use in pregnancy

Consult your healthcare provider before using erythromycin if you are pregnant or planning to become pregnant. The potential risks and benefits should be considered.

Use in breastfeeding

Erythromycin is generally considered safe to use while breastfeeding. However, it is important to consult your healthcare provider for further guidance.

Side effects of erythromycin

Common adverse effects of erythromycin may include:

  • Nausea
  • Vomiting
  • Diarrhea
  • Abdominal pain
  • Stomach pain
  • Loss of appetite
  • Skin rash

Serious side effects such as hearing loss or arrhythmias are more likely in elderly patients. Get medical advice right away if you have a serious side effects such as an allergic reaction. Symptoms include hives, trouble breathing, worsening shortness of breath, sore throat, chest pain, swelling of the face, tongue or throat, skin rash, blisters, and serious skin reactions.

Interactions with other drugs

Erythromycin may interact with certain medications, including anticoagulants such as warfarin, carbamazepine, digoxin, diltiazem, atorvastatin, lovastatin, midazolam, phenytoin, quinidine, sildenafil, simvastatin, verapamil, theophylline, triazolam, astemizole, cisapride, dihydroergotamine, ergotamine, pimozide, and terfenadine. It is important to inform your healthcare professional about all the prescription drugs, over the counter nonprescription medications, salt substitutes, herbal products, supplements, and vitamins you are taking to avoid potential adverse events and drug interactions.

Similar drugs to erythromycin

Other antibiotics used for bacterial infections include azithromycin, clarithromycin, clindamycin, and tetracycline.



Now Patient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information in this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

Stefano Mirabello Medical Reviewer
Pharmacist / B.Pharm
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