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colistin

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Brand names: Coly-Mycin M

Polymyxin Antibiotic Rx

Cortisporin TC Otic is an ear drop medicine. It treats ear infections by killing bacteria and reducing inflammation.

What it does

This medicine treats outer ear infections caused by bacteria.

Common side effects

No common side effects listed.

Key warnings

Neomycin can sometimes cause skin sensitivity.

How It Works

Cortisporin TC Otic contains antibiotics that kill bacteria. It also has hydrocortisone, which reduces swelling and itching. Thonzonium bromide helps the medicine penetrate the ear tissues.

How to Take It

Use this medicine for no more than 10 days. First, clean and dry your ear with a sterile cotton applicator. For adults, put 5 drops into the infected ear 3 to 4 times a day. For children, 4 drops are recommended.

Pregnancy & Breastfeeding

It is not known if this medicine will harm an unborn baby. Talk to your doctor if you are pregnant or breastfeeding before using this medicine.

Missed Dose

If you miss a dose, use it 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 at room temperature between 68° to 77°F (20° to 25°C).

Serious Warnings

Neomycin can sometimes cause skin sensitivity. This medicine may also cause hearing problems or kidney damage, but this is rare.

Known Drug Interactions

Monitor renal function in patients receiving vancomycin and concurrent and/or sequential systemic or topical use of other potentially, neurotoxic and/or nephrotoxic drugs, such as amphotericin B, aminoglycosides, bacitracin, polymyxin B, colistin, viomycin, or cisplatin.

Mechanism: Both of these drugs can be harmful to the kidneys, and using them at the same time increases the risk of kidney damage.

What to do: Your doctor should monitor your kidney function closely while you are receiving these medications.

Common Questions

What is in Cortisporin TC Otic?
It contains colistin sulfate, neomycin sulfate, hydrocortisone acetate, and thonzonium bromide.
How much of each medicine is in each mL?
Each mL has 3 mg of colistin base, 3.3 mg of neomycin base, 10 mg of hydrocortisone acetate, and 0.5 mg of thonzonium bromide.
Can I use this if I am allergic to any of the ingredients?
No, you should not use this product if you are allergic to any of its ingredients.
Can I use this if I have a viral infection in my ear?
No, you should not use this if you have a viral infection like herpes simplex or varicella zoster in your ear.
How long should I use this medicine?
You should limit therapy with this product to 10 days.
How do I apply the ear drops?
Lie with the affected ear upward, put in the drops, and stay in that position for 5 minutes.
Can I use a cotton wick with this medicine?
Yes, you can insert a cotton wick into the ear canal and saturate it with the suspension. Keep the wick moist and replace it every 24 hours.
What are the possible side effects?
Possible side effects include skin sensitivity, hearing problems, and kidney damage, but these are rare.
What should I do if I experience a side effect?
Contact your medical professional for advice about adverse reactions.
Where can I report suspected adverse reactions?
You can report suspected adverse reactions to Endo at 1-800-462-3636 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
Does colistin interact with other medications?
Yes, colistin has 1 known drug interactions. Notable interactions include vancomycin. Always inform your doctor about all medications you are taking.
What drug class is colistin?
colistin belongs to the Polymyxin Antibiotic drug class. It requires a prescription (Rx). This medicine treats outer ear infections caused by bacteria.
Is colistin safe during pregnancy?
It is not known if this medicine will harm an unborn baby. Talk to your doctor if you are pregnant or breastfeeding before using this medicine. Always consult your healthcare provider before using any medication during pregnancy or breastfeeding.

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What the FDA Data Shows for colistin

The FDA label for colistin (sold under brand names such as Coly-Mycin M) classifies it as a prescription-only medication in the Polymyxin Antibiotic class. This medicine treats outer ear infections caused by bacteria. Labeling covers dosing, contraindications, and monitoring requirements derived from clinical trials.

Post-market surveillance from the FDA Adverse Event Reporting System (FAERS) captures real-world experience. Voluntary reports accumulate over the lifetime of a drug and reflect wide-ranging clinical use. The database also lists 1 documented drug interaction derived from FDA labeling, with the top-flagged interaction rated minor severity. Acquisition-cost data is surveyed weekly by CMS and updated as manufacturers report changes.

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, 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).

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: August 1, 2024

All federal data sources used on this page