Dewormers & parasiticides · Over the counter
Safe-Guard withdrawal time for cattle
fenbendazole — Panacur (same molecule). Used for stomach and intestinal worms and lungworms — oral suspension, paste, blocks, and feed forms.
Slaughter withdrawal
13 days
feed/mineral forms; 8 days for suspension and paste
| Route / formulation | Slaughter withdrawal | Detail |
|---|---|---|
| Oral suspension or paste | 8 days | |
| Medicated feed, blocks, and mineral forms | 13 days |
Milk & dairy: Approved for dairy cattle — check your specific formulation’s label for its milk withhold (several forms carry none).
Safe-Guard is the white-wormer standby, and its withdrawal depends on the form: 8 days for the drench suspension and paste, 13 days for the feed-based forms (pellets, blocks, mineral). The benzimidazole class works by contact time in the gut, which is also why the feed forms — dosed over multiple days — carry the longer figure.
Fenbendazole is one of the few dewormers with dairy approvals across several formulations, making it a common pick for lactating cows where the mectin injectables are off-limits.
What the label requires
- Suspension/paste: 8 days. Feed, block, and mineral forms: 13 days.
- Dairy-approved in several formulations — verify the milk withhold on your specific form.
- Resistance to benzimidazoles exists in some parasite populations; fecal egg counts tell you if it is still working on your place.
Always follow the label on your bottle and your veterinarian's directions. Extra-label use — any different dose, route, or frequency — voids the withdrawal above; your vet sets the interval instead, usually via FARAD. When in doubt, hold longer. Label data checked July 18, 2026. Source: FDA label (DailyMed).
Never ship a treated animal by mistake
Log a treatment in HerdCommand with its withdrawal days and the animal carries a hold flag until the date clears — and the sale workflow warns you before a flagged animal ends up on a load. Works from the phone in your pocket, at the chute.
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Common questions
Is the Safe-Guard withdrawal 8 or 13 days?
Both, depending on form: 8 days for the oral suspension and paste, 13 days for feed-through forms like pellets, blocks, and medicated mineral. The dosing duration differs, so the labels differ.