# Ivomec (Ivermectin) Dose for Cattle & Pigs: Strengths & Dose Calculator

> Ivomec 1% injection contains 10 mg ivermectin per mL and is approved in the US for cattle (200 mcg/kg, 1 mL per 50 kg SC) and swine (300 mcg/kg, 1 mL per…

- Source page: https://wevet.in/vet-products/ivomec-ivermectin/
- Type: Vet product
- Publisher: WeVet
- Updated: 2026-11-02
- Medically reviewed by: Dr. Ravi Baraiya, B.V.Sc. (2026-11-02)
- Audience: veterinarians and veterinary students

Ivomec 1% injection contains 10 mg ivermectin per mL and is approved in the US for cattle (200 mcg/kg, 1 mL per 50 kg SC) and swine (300 mcg/kg, 1 mL per 33 kg SC) [1]. The label warns against use in other species because of severe reactions, including deaths in dogs [1].

- Brand: Ivomec
- Contains: Ivermectin
- Company: Boehringer Ingelheim Animal Health
- Label species: Cattle, Pigs, Reindeer, American bison
- Data from: USA (FDA label)

## Strengths

- Ivomec 1% injection (cattle & swine): Ivermectin 10 mg per mL (verified, [1])

## Dose by species

| Species | Use | Dose | Route | How often | Basis |
|---|---|---|---|---|---|
| Cattle | Internal and external parasites (1 mL per 110 lb (50 kg).) | 200 mcg/kg [1] | SC (in front of or behind the shoulder) | Single dose | Label |
| Pigs | Internal and external parasites (1 mL per 75 lb (33 kg). Treat sows at least 7 days before farrowing.) | 300 mcg/kg [1] | SC (neck) | Single dose | Label |
| Reindeer | Special minor use | 200 mcg/kg [1] | SC | Single dose | Label |
| American bison | Special minor use (American bison) | 200 mcg/kg [1] | SC | Single dose | Label |

## Label directions

- Cattle: subcutaneous injection only, under the loose skin in front of or behind the shoulder, 1 mL per 110 lb (50 kg) [1].
- Swine: subcutaneous injection in the neck, 1 mL per 75 lb (33 kg) [1].

## Warnings and precautions

- Not for intravenous or intramuscular use [1].
- Should not be used in other animal species: severe adverse reactions, including fatalities in dogs, may result [1].
- Underdosing may result in ineffective treatment and encourage the development of parasite resistance [1].

## Withdrawal periods

- Cattle, meat: 35 days — Do not treat cattle within 35 days of slaughter. [1]
- Cattle, milk: check pack — Milk withdrawal not established — do not use in female dairy cattle of breeding age. [1]
- Pigs, meat: 18 days — Do not treat swine within 18 days of slaughter. [1]
- Reindeer, meat: 56 days — Do not treat reindeer or American bison within 8 weeks (56 days) of slaughter. [1]

Interactive dose calculator (strength prefilled only when confirmed): use the page link above.

## Frequently asked questions

### What is the Ivomec dose for cattle?

200 mcg/kg, which is 1 mL per 110 lb (50 kg), by subcutaneous injection [1].

### Can Ivomec injection be used in dogs?

No. The label says it should not be used in other species, as severe reactions including deaths in dogs may result [1].

### What is the Ivomec withdrawal period?

35 days before slaughter for cattle and 18 days for swine; it must not be used in female dairy cattle of breeding age [1].

## References

[1] IVOMEC (ivermectin) injection, solution — label — DailyMed (US NLM) — FDA-approved label, Boehringer Ingelheim (2026). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=84fe39b2-0423-479a-b81f-198e2fb4e826
[2] Mange in Dogs and Cats — Merck Veterinary Manual — M. W. Dryden (reviewed 2023, updated May 2025) (2025). https://www.merckvetmanual.com/integumentary-system/mange/mange-in-dogs-and-cats
[3] Pharmacodynamics: Mechanisms of Anthelmintic Action in Animals — Merck Veterinary Manual — E. Claerebout & C. E. Lanusse (Apr 2025) (2025). https://www.merckvetmanual.com/pharmacology/anthelmintics/pharmacodynamics-mechanisms-of-anthelmintic-action-in-animals
[4] HEARTGARD PLUS (ivermectin and pyrantel pamoate) chewable — label — DailyMed (US NLM) — FDA-approved label, Boehringer Ingelheim (2026). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=595a4883-6b37-4190-9579-a2c7ca4738eb

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Numbers in [brackets] cite the references above. For veterinary professionals. Information supports — never replaces — clinical judgement; always check the current product label and local regulations.
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