How long does a tick tablet work for dogs? - briefly
Most oral tick preventatives protect dogs for about four weeks after a single dose. A limited number of formulations extend coverage to eight weeks, but the typical labeled duration is one month.
How long does a tick tablet work for dogs? - in detail
The effectiveness of oral tick preventatives for dogs varies according to the active ingredient, dosage schedule, and individual factors such as weight, age, and health status.
Most products contain isoxazoline compounds (e.g., afoxolaner, fluralaner, sarolaner, or lotilaner). These agents achieve systemic protection that typically lasts 30 days after a single dose. Some formulations, such as fluralaner, are labeled for a 12‑week interval, extending protection to roughly three months per administration.
Key determinants of the protection period include:
- Active ingredient – Isoxazolines differ in half‑life; longer‑acting compounds permit extended dosing intervals.
- Dosage based on body weight – Underdosing reduces plasma concentration, shortening the effective window.
- Compliance with the recommended schedule – Missing a dose or delaying re‑dosing can create gaps in coverage.
- Metabolic rate and health conditions – Illness or concurrent medications may alter drug clearance, affecting duration.
When a dog receives the correct dose on schedule, the drug maintains blood concentrations above the therapeutic threshold for the stated period, preventing attachment and feeding of attached ticks. If a tick attaches after the drug level falls below that threshold, the tablet no longer offers protection, and the dog becomes vulnerable to tick‑borne diseases.
To ensure continuous coverage, pet owners should:
- Verify the specific product’s recommended re‑dosing interval.
- Weigh the dog before each administration to confirm appropriate dosage.
- Record administration dates and set reminders for the next dose.
- Consult a veterinarian if the dog has liver or kidney impairment, as dosage adjustments may be necessary.
In summary, oral tick preventatives generally provide one month of protection, with some products extending to 8–12 weeks. Maintaining the prescribed schedule and correct dosing is essential for uninterrupted efficacy.