Drug Identity
Active Ingredient
Erythromycin
Chemical Class
Antibacterial (Protein synthesis inhibitor) pharmacological group on the basis of mechanism of action and also classified in Antibiotics pharmacological group
Pharmacological Group
on the basis of mechanism of action and also cl...
ATC Code
D10AF02, J01FA01, S01AA17
Status
Essential Medicine
What is Legion?
Uses
Erythromycin belongs to a group of drugs called macrolide antibiotics. Macrolide antibiotics slow the growth of, or sometimes kill, sensi...
How It Works
Chemical Class
Antibacterial (Protein synthesis inhibitor) pharmacological group on the basis of mechanism of action and also classified in Antibiotics pharmacological group
Pharmacological Group
on the basis of mechanism of action and also classified in Antibiotics pharmacological group
Erythromycin (as Esotolate) is the derivative of Erythromycin. It is of Semi Synthetic origin. It belongs to Antibacterial (Protein synthesis inhibitor) pharmacological group on the basis of mechanism of action and also classified in Antibiotics pharmacological group. The Molecular Weight of Erythromycin is 733.90. Its pKa is 8.8.
How to Take It
1
Adult · IV
0.5 to 1 g — 6 hourly
2
Adult · PO
250 to 500 mg — 6 hourly
For 7-14 days.
3
Child · Oral
18.75 mg/kg — 4 hourly
Safety Alerts
You should not use erythromycin if you are allergic to it
Some medicines can cause unwanted or dangerous effects when used with erythromycin
Your doctor may change your treatment plan if you also use: lovastatin , simvastatin
or ergotamine , or dihydroergotamine
Tell your doctor if you have ever had: liver or kidney disease
Important Warnings
Some medicines can cause unwanted or dangerous effects when used with erythromycin
Your doctor may need to change your treatment plan if you use cisapride, pimozide, ergotamine, or dihydroergotamine
Before you take erythromycin, tell your doctor if you have liver disease, myasthenia gravis, a heart rhythm disorder, a history of Long QT syndrome, or low levels of potassium or magnesium in your blood
Take this medicine for the full prescribed length of time
Your symptoms may improve before the infection is completely cleared
Skipping doses may also increase your risk of further infection that is resistant to antibiotics
Erythromycin will not treat a viral infection such as the common cold or flu
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection
Side Effects
Get emergency medical help if you have signs of an allergic reaction to erythromycin ( hivesdifficult breathingswelling in your face or throat) or a severe skin reaction (feversore throatburning eyesskin painred or purple skin rash with blistering and peeling). Call your doctor at once if you have: severe stomach paindiarrhea that is watery or bloody (even if it occurs months after your last dose)headache with chest pain and severe dizzinessfaintingfast or pounding heartbeatsa seizurehearing problems (rare)pancreatitis - severe pain in your upper stomach spreading to your backnausea and vomiting
Drug Interactions
Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take
which may increase side effects or make the medications less effective. Many drugs can interact with erythromycin
and some drugs should not be used at the same time. Tell your doctor about all your current medicines and any medicine you start or stop using. This includes prescription and over-the-counter medicines
vitamins
and herbal products . Not all possible interactions are listed here.
Storage
Inj (reconstituted soln) Store in refrigerator. Use within 7 days if kept at room temperature. Oral Susp (reconstituted) Store in refrigerator. Do not Freeze. Use within 10-14 days if kept at room temperature. Skin Oint, Gel and Lotion, Eye Oint Store at room temperature. Do not Freeze. Protect from Sunlight and Heat. Tab, Caps Store in a well closed container, Below 40°C. Protect from Moisture.
Price Intelligence
Rs 42.83
DRAP approved maximum price · per pack of 10 · approved 18 Nov, 2025
No retail price observed for this pack. Retailers may not exceed the approved maximum.
Prices across sources
DRAPper pack of 10Rs 42.83
Should you consider an alternative?
Other options containing Erythromycin, and what they are not.
Identical active ingredient at the same strength. Cheapest per unit first.
Erythrocin
250Mg
Rs 207.1Rs 20.71/unit
Lowest price per unitINDUS PHARMA
Erythro
250mg
Rs 669.39 ceiling
No DRAP alertsUNEXO LABS (PVT) LTD.
Acumen
250mg
Rs 527.7 ceiling
RAKAPOSHI PHARMACEUTICAL (PVT) LTD.
Ordered by lowest price per unit where a pack size is known, then by price. Order is never affected by sponsorship. Not medical advice — confirm any change with your pharmacist or doctor.
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