Sulfamethoxazole-Trimethoprim for Dogs

Sulfamethoxazole + Trimethoprim for Dogs – Dog Sulfa 960 mg Tablets

Knock out skin, urinary and respiratory infections with dog sulfa antibiotic tablets—960 mg of sulfamethoxazole-trimethoprim (SMZ-TMP) in every dose. Our USP-grade chew-scored tablets ship nationwide without a prescription and include weight-based dosing charts for safe, at-home therapy.

Best-Selling Size

When to Use SMZ-TMP

A dual-action sulfonamide antibiotic ideal for:

Staph skin infections & hot spots unresponsive to beta-lactams
Complicated UTIs with E. coli or Proteus
Respiratory infections (Bordetella, Streptococcus)
Coccidia & toxoplasmosis protozoal control

Weight-Based Dosage Guide

Standard guideline: 13 mg per lb of body weight every 12 hours (combined SMZ + TMP). Use our Dosage Calculator for exact mg and tablet fractions. Examples:

20 lb dog → 260 mg (≈¼ × 960 mg tablet) twice daily
40 lb dog → 520 mg (≈½ × 960 mg tablet) twice daily
80 lb dog → 1,040 mg (≈1 × 960 mg + ⅛ tablet) twice daily

Storage & Safety Tips

Provide plenty of water—sulfa drugs can crystallize in concentrated urine.
Finish the full course; stopping early may cause relapse.
Monitor for sulfa allergy: rash, facial swelling, dry eye.
Store tablets at 68–77 °F (20–25 °C) in a dry place.

Is dog SMZ-TMP the same as human Bactrim®?

The active molecules are identical. Veterinary-labeled dog SMZ-TMP provides canine weight charts, flavoring and GMP facility traceability—safer than human generics.

Do I need a prescription?

No. Companion-animal antibiotics may be sold OTC when labeled for canine use. Always follow dosing guidelines and consult a vet for complex infections.

How quickly will my order ship?

Orders placed before 1 PM ET ship the same business day via USPS or FedEx 2-Day— so treatment can begin in 48 hours.