Systemic Antibiotics for Dogs in Canada — Top 6 Prescription Options for 2026

Clavamox Drops (amoxicillin with clavulanate) is a prescription systemic antibiotic favored for its broad-spectrum beta-lactam activity and a liquid formulation that makes dosing small dogs and puppies easier. It holds a best-in-class position for routine skin, wound and soft-tissue infections because it pairs reliable efficacy with generally lower acquisition cost and flexible dosing compared with long-acting injectables like Convenia. Compared with fluoroquinolones (Baytril, Zeniquin) and tetracyclines (doxycycline), Clavamox is often chosen first-line for mixed aerobic infections and when oral liquid dosing is preferred.

Baytril Taste Tabs (enrofloxacin) are a palatable, prescription fluoroquinolone tablet that provide strong gram-negative coverage and convenience for owners who prefer flavored oral tablets. They are positioned as a market leader for difficult gram-negative or refractory infections where potency and tissue penetration are priorities, though they are generally more costly and used more selectively than first-line options like Clavamox or generic doxycycline. Compared to Zeniquin, Baytril offers a similar fluoroquinolone profile but the tablet taste formulation and established brand recognition can improve owner compliance.

Convenia Injectable (cefovecin) is a prescription, long-acting injectable cephalosporin that reliably provides up to 14 days of systemic coverage from a single clinic-administered dose, making it best-in-class for compliance-challenged patients. Its principal advantage over oral options like Clavamox, Baytril and doxycycline is elimination of at-home dosing, which can translate to fewer missed doses and improved clinical outcomes despite a higher per-dose price and the need for veterinary administration. Convenia is often chosen for outpatient cases where guaranteed short-term coverage and convenience justify the premium cost.

Doxycycline Hyclate Tablets are a widely used prescription tetracycline-class antibiotic valued for broad-spectrum activity, intracellular penetration and low cost as a generic option for conditions such as tick-borne infections. They hold a practical market position as a cost-effective, oral systemic choice compared with branded fluoroquinolones and injectables, although gastrointestinal sensitivity and photosensitivity considerations mean clinicians may prefer alternatives for certain patients. In comparison to Clavamox and the fluoroquinolones in this list, doxycycline is often selected for its affordability and efficacy against atypical and intracellular organisms rather than for routine pyogenic infections.

Simplicef (cefpodoxime proxetil) is a veterinary-labeled third‑generation cephalosporin that has become a market leader for systemic canine infections due to its once‑daily dosing and palatable tablet formulation that improve owner adherence. Compared with metronidazole, Simplicef provides broader aerobic coverage and the advantage of a veterinary-approved label, though it is typically priced higher than generic metronidazole products.

Metronidazole tablets (generic) are a widely available, low‑cost prescription option commonly used in dogs for anaerobic bacterial and certain protozoal infections, offering strong value for cost‑sensitive treatment plans. Versus Simplicef, metronidazole has a narrower spectrum and is often used for specific anaerobic or gastrointestinal indications, but its extensive generic manufacture and lower price make it a practical choice for many clinics.