Eryster 500 mg Tablet

Eryster 500 mg Tablet is a prescription antibiotic that contains 500 mg of erythromycin in each tablet. It belongs to the macrolide class of antibiotics and is used to treat certain bacterial infections. Eryster 500 mg Tablet works only against bacteria, not viruses, so it is not used for colds or flu. Your prescriber chooses this strength when a tablet form and a higher per-dose amount of erythromycin are appropriate for the infection being treated.

How it works: Erythromycin stops bacteria from making the proteins they need to grow and multiply. In the tablet form, Eryster 500 mg Tablet is swallowed and absorbed so the medicine can reach the infection site through the bloodstream.

Eryster 500 mg Tablet is a higher-strength tablet, so it is typically used when a clinician wants a larger amount of erythromycin in each dose rather than taking multiple lower-strength tablets. Because each tablet already contains 500 mg, it may be more convenient for adults who can swallow tablets and need a doctor-selected regimen based on the infection and overall health.

• Certain bacterial respiratory tract infections
• Some skin and soft tissue infections
• Some ear, throat, or sinus infections
• Other infections caused by susceptible bacteria

• Swallow Eryster 500 mg Tablet with a full glass of water unless your doctor gives different directions.
• Take it exactly as prescribed and try to space the doses evenly through the day.
• If it upsets your stomach, ask your clinician or pharmacist whether it should be taken with food; some erythromycin tablets are better absorbed on an empty stomach, but tolerability matters.
• Finish the full prescribed course even if you feel better early.
• Do not crush, split, or chew the tablet unless your pharmacist confirms this specific product can be altered.
• If you miss a dose, take it when you remember unless it is almost time for the next dose; do not double up.

Each Eryster 500 mg Tablet provides 500 mg of erythromycin per tablet, which is a stronger single dose than lower-strength erythromycin tablets. The exact schedule, total daily dose, and maximum number of tablets per day depend on the infection, your age, kidney or liver function, and other medicines, so only your doctor should set the regimen.

Do not change your dose or stop the medicine without speaking to your doctor.

Common side effects of Erythromycin may include:

• Nausea, which may be more noticeable with this higher-strength tablet
• Diarrhea
• Stomach pain or cramping
• Vomiting
• Loss of appetite
• Mild headache

• Tell your doctor if you have a history of heart rhythm problems, especially QT prolongation, because erythromycin can increase that risk.
• Use caution if you have liver disease; dose adjustment or closer monitoring may be needed.
• Let your prescriber know about all medicines you take, because erythromycin has many interaction risks.
• Avoid taking this tablet with medicines that can also affect heart rhythm unless your doctor approves it.
• If you get severe stomach upset, dehydration, or persistent diarrhea, contact your clinician promptly.
• Do not use this antibiotic for viral illnesses like colds or influenza.
• Ask about alcohol use if you are being treated for a stomach or liver condition or if alcohol worsens your side effects.

• Statin medicines such as simvastatin or lovastatin
• Warfarin and other blood thinners
• Certain heart rhythm medicines, including some antiarrhythmics
• Ergot medicines
• Other drugs that prolong the QT interval

Store Eryster 500 mg Tablet in its original strip/box at room temperature, away from moisture and heat, and keep it out of reach of children.