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Powder 21 (Canada)

This page contains information on Powder 21 for veterinary use.
The information provided typically includes the following:
  • Powder 21 Indications
  • Warnings and cautions for Powder 21
  • Direction and dosage information for Powder 21

Powder 21

This treatment applies to the following species:
Company: P.V.L.

Soluble Powder

DIN 00337552

Veterinary use only


Active Ingredients

Each gram contains:

Sodium Sulfamethazine

667 mg

Sodium Sulfathiazole

333 mg

Powder 21 Indications

Cattle: For the treatment of bacterial infections (pneumonia, metritis, enteritis, foot rot, or septicemia accompanying acute mastitis) and as an aid in the treatment of shipping fever complex.

Swine: For the treatment of enteritis and respiratory diseases caused by bacteria susceptible to sulfamethazine and sulfathiazole.

Directions For Use

To reduce the development of antimicrobial resistance and maintain effectiveness, use this antibiotic prudently.

Pre-mix 1 package in 11 L of water. Add to each 400 L of drinking water the first day, and to each 500 L on the second and subsequent days.

For use as a drench, give 60 mL of a 12.5% solution or 30 mL of a 25% solution per 34 kg bodyweight. Reduce the dose to 1/2 on the second, third, and fourth days.

To make a 12.5% solution, dissolve 1 package in 4.5 L water; to make a 25% solution, dissolve 2 packages in 4.5 L water.

If improvement is not seen in 48 hours, discontinue use and reassess the diagnosis.


Milk taken from treated animals within 96 hours after the latest treatment with the drug must not be used in food.

Treated animals must not be slaughtered for use in food for at least 10 days after the latest treatment with this drug.

Sulfonamides can cause allergic reactions in sensitized individuals. When handling the product, avoid inhalation, oral exposure and direct contact with skin or eyes.

Keep out of reach of children.


Store at room temperature (15-30°C).

Professional Veterinary Laboratories, 1199 Sanford Street, Winnipeg, Manitoba R3E 3A1

1-800-465-7122 -

Net Contents: 567 g

CPN: 1203031.3

Telephone:   204-589-7361
Toll-Free:   1-800-465-7122
Fax:   204-943-9612
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