General Drug Information and Indications

Ivermectin injectable/pour-on for internal and external parasites in cattle. Ivermectin injectable/pour-on for cattle. Mechanism: macrocyclic lactone — potentiates GluCl channels in invertebrate parasites → hyperpolarization → paralysis and death. Active against GI roundworms, lungworms, cattle grubs, lice, and mites. IM injection (1%) or topical pour-on application. Key information Ivermectin — see ivermectin entry. Do not use in MDR1-mutation dogs. Cattle: withdrawal times required.

How to Give this Medication

SQ injection (cattle): inject into neck area at recommended volume per site. Pour-on: apply along backline from withers to tailhead. Ensure product is applied to skin (part hair for best absorption). Store at room temperature; protect from light. If a dose is missed This medication is administered by a veterinarian or veterinary staff in a clinical setting. Missed doses are managed by your veterinary team — contact your veterinarian to reschedule.

Side Effects

Injection/pour-on: local reactions, alopecia at pour-on site. CNS toxicity (MDR1-mutant dogs if contaminated feed/bedding). Generally safe in cattle at labeled doses. GI: decreased feed intake (transient). Withdrawal times required.

Precautions

For animals Observe food animal withdrawal times for milk and meat. Pour-on: avoid concurrent drugs with narrow safety margins in MDR1-mutant dogs. External use only. For people handling this medication Wash hands thoroughly with soap and water after handling. Avoid contact with eyes; if contact occurs, flush with water for 15 minutes and seek medical attention. Keep out of reach of children. If accidental ingestion occurs, contact Poison Control (1-800-222-1222). Ivermectin — Wash hands thoroughly with soap and water after handling. after handling pour-on (skin absorption possible). Keep out of reach of children.

Overdose

Contact your veterinarian. Ivermectin overdose causes neurological signs. IV lipid therapy may be needed.

Vetrimec dosage forms

ProductStrengthFormSizeType
VETRIMEC 1.87% PASTE: IVERMECTIN—Paste1Commercial

Sources

This information is provided for educational purposes and is not a substitute for advice from your veterinarian. Source: Merck Veterinary Manual (merckvetmanual.com); Plumb's Veterinary Drug Handbook (Plumb, D.C., app.plumbs.com)