Polymyxin B (as Sulfate) Otic Suspension
Polymyxin B (as Sulfate) is a compounded formulation containing polymyxin B (as sulfate), prepared by Mixlab for veterinary use. Available by prescription.
How to Give Otic Suspension Ear Medication
Otic suspension are creamy ear meds that coat the ear canal to treat infections or inflammation. Here’s how to give them safely:
- Warm the medication in your hands for a minute (don’t overheat).
- Secure your pet comfortably. Lift the ear flap to straighten the canal.
- Clean the ear first only if your vet advised it.
- Add drops: Use the dropper or syringe to apply the prescribed amount into the ear canal. Don’t insert too deep into the ear canal.
- Massage the base of the ear for 20–30 seconds to help spread the medicine.
- Let your pet shake their head, then gently wipe away any excess.
- Repeat for the other ear if needed.
- Praise, treat, and wash your hands.
- Use for the full duration prescribed—don’t stop early, even if the ear looks better.
The uses and pharmacology described below reflect the FDA-approved labeling for this active ingredient; your veterinarian determines whether and how they apply to your animal's treatment plan.
Polymyxin B sulfate is a peptide antibiotic utilized in veterinary medicine for localized management of resistant bacterial challenges. It is a prescription medication available in topical and ophthalmic formats for use in dogs and cats, frequently considered by veterinarians for patients presented with gram-negative bacterial infections. Your veterinarian will determine the clinical appropriateness based on diagnostic findings and sensitivity testing.
Prescription only. Use only under the direction of a licensed veterinarian. This information is not a substitute for veterinary diagnosis, prescribing or monitoring. Compounded drugs are not approved by the FDA for safety or effectiveness.
At a pharmacological level, it manages bacterial populations by interfering with the integrity of the cell membrane. Commonly observed effects include localized changes at the site of application such as mild redness, temporary stinging or increased sensitivity. Because it is intended for localized use, systemic absorption is typically minimal; however, your veterinarian will monitor for observational signs of sensitivity. Owners should monitor for any persistent irritation and contact their veterinarian promptly. It is typically evaluated carefully in patients with known renal impairment if systemic absorption is a clinical concern.
Yes. Polymyxin B is a prescription antibiotic and requires a valid authorization from a licensed veterinarian. Mixlab verifies all legal requirements before any medication is prepared or shipped.
Yes. Mixlab specializes in compounding polymyxin B into customized strengths and vehicles, such as specialized eye drops or topical solutions, to suit the specific needs of your pet.
Veterinarians discuss polymyxin B for its ability to help manage gram-negative bacteria that may not respond to other antibiotics. This offers an approach to addressing complex ocular infections.
Your veterinarian will provide guidance on the administration schedule. It is important to avoid touching the dropper tip to any surface, including your pet’s eye, to maintain sterility.
You should monitor for observational signs like decreased redness and improved comfort. If you notice increased squinting or discharge, contact your veterinarian immediately for a clinical review.
