Agmectin Oral Ivermectin for Swine: Effective Parasite Control Without the Needle
Parasites are often invisible thieves in a piggery. Even when infected pigs do not immediately appear sick, worms, lice and mange mites may interfere with their comfort, health and productive performance. A practical parasite-control program is therefore an important part of responsible swine management.
Agmectin from Metrovet–Cargill is an oral ivermectin product formulated as a granulated powder that can be mixed with complete feed. It provides farmers with a needle-free method of controlling several important internal and external parasites affecting pigs.
What Is Agmectin?
Agmectin is a 0.3% ivermectin granulated powder for veterinary use. Each gram contains 3 mg of ivermectin and is intended to be mixed thoroughly with complete feed according to the dosage indicated on the package.
The published product information identifies Agmectin specifically for the treatment and control of parasites affecting swine, including:
- Gastrointestinal roundworms such as Ascaris suum, Ascarops strongylina, Hyostrongylus rubidus and Oesophagostomum species
- Kidney worms, particularly Stephanurus dentatus
- Lungworms belonging to Metastrongylus species
- Hog lice, Haematopinus suis
- Sarcoptic mange mites, Sarcoptes scabiei var. suis
Agmectin is available in 2-gram and 5-gram sachets. The product information lists a seven-day withdrawal period before slaughter, although farmers should always confirm this against the current label on the sachet they are using.(UBTAC)
How Ivermectin Works
Ivermectin belongs to the group of antiparasitic medicines known as macrocyclic lactones or endectocides. These medicines can act against certain parasites living inside the animal as well as parasites living on its skin.
Ivermectin binds to specialized chloride channels found in the nerve and muscle cells of susceptible parasites. This disrupts nerve transmission, resulting in paralysis and death of the parasite. Mammals do not possess the same glutamate-gated chloride channels, which contributes to ivermectin’s margin of safety when the correct veterinary formulation and dosage are used.
However, ivermectin should not be described as a treatment for every type of worm. Agmectin’s listed indications cover specific roundworms, lungworms, kidney worms, lice and mange mites. Farmers should not assume that it will control tapeworms, liver flukes, coccidia or other organisms not stated on the label.
Is Oral Ivermectin More Effective Than Injectable Ivermectin?
Both oral and injectable ivermectin can be effective when they are properly formulated, accurately dosed and used against parasites included on their respective labels. The oral route should therefore not be presented as universally more powerful than injection.
The route of administration affects where and how much ivermectin reaches different parts of the animal. In one cattle study, oral administration produced the highest ivermectin levels in gastrointestinal contents and maximized exposure of the small-intestinal parasite Cooperia oncophora. Subcutaneous injection, however, produced higher blood concentrations and greater exposure of the stomach worm Ostertagia ostertagi. This demonstrates that one route may perform better against a particular parasite while another route may be more suitable for a different parasite. (ScienceDirect)
The real advantage of Agmectin is therefore not that oral ivermectin is always superior. Its advantage is that it provides an effective and practical feed-based option for the parasites and swine uses stated on its label.
Advantages of Oral Agmectin Over Injectable Ivermectin
1. No Needles or Injection-Site Injuries
Injectable ivermectin requires proper restraint, the correct needle size, sterile equipment and sanitation of the injection site. Injectable product labels warn that contaminated equipment may contribute to injection-site infections, while mild and temporary pain reactions can occur in pigs following subcutaneous administration.
Because Agmectin is mixed with feed, it avoids:
- Needle punctures and broken needles
- Incorrect injection placement
- Injection-site swelling or infection
- Accidental needlestick injuries to handlers
- Pain caused by the injection procedure
This can be especially useful when treating young pigs, nervous animals or large groups.
2. Less Individual Handling and Restraint
Injecting pigs one by one requires catching or restraining every animal. This can be stressful for the pigs and labor-intensive for farm personnel.
An oral feed medication can be administered to a group without individually injecting each pig. This may reduce handling time and animal disturbance, provided the farmer can ensure that every pig consumes the correct amount of medicated feed.
3. Convenient for Herd-Level Treatment
Agmectin can be incorporated into a controlled amount of complete feed. This makes it practical for farms treating several pigs at the same time.
The published product information provides weight-based treatment capacities for each sachet. It also distinguishes between treatment of a mixed-age swine herd and routine deworming. Because these instructions can vary according to the treatment objective, the current sachet label should be followed exactly.(UBTAC)
4. No Special Injection Equipment
Oral administration does not require syringes, automatic injectors, replacement needles, disinfectants or disposal of used sharps. This can simplify parasite-control activities for small and medium-sized farms where trained injectors or specialized equipment may not always be available.
5. A Product-Specific Seven-Day Withdrawal Period
The published Agmectin information lists a withdrawal period of seven days before slaughter. By comparison, a current United States label for injectable ivermectin in swine specifies an 18-day slaughter withdrawal period. This does not mean that all oral products have shorter withdrawal times than all injectable products; withdrawal periods depend on the formulation, concentration, registration and country-specific label. (Uybontiong Agriventures Corp. is the official Distributor of Agemectin in Cebu, Central Visayas, Philippines starting July 2026.)
Farmers must follow the withdrawal period printed on the exact product being used. Never transfer the withdrawal period of one ivermectin brand or formulation to another.
The Main Challenge of Oral Deworming: Ensuring the Full Dose Is Eaten
The convenience of oral treatment also brings an important responsibility: each pig must consume its complete dose.
A dominant pig may eat more than its intended share, while a smaller, sick or weak pig may eat less. If ivermectin is mixed into a large volume of feed, some animals may fail to consume the full medicated portion.
Underdosing may result in incomplete parasite control and can contribute to the development of ivermectin-resistant parasite populations. Veterinary ivermectin labels specifically warn that dosing must be based on current body weight and that underdosing may encourage resistance.
For more dependable oral treatment:
- Estimate or measure the pigs’ body weights as accurately as possible.
- Group pigs of similar size whenever practical.
- Mix Agmectin uniformly into a small, controlled quantity of feed.
- Make sure the medicated feed is completely consumed before offering the remaining ration.
- Observe shy, weak, sick or off-feed pigs separately.
- Follow the complete treatment and repeat schedule on the current label.
Oral medication may not be the best route for pigs that have stopped eating. Such animals should be assessed by a veterinarian, who may recommend a different formulation or treatment plan.
Deworming Is Only One Part of Parasite Control
Treatment kills susceptible parasites in or on the pig, but it does not automatically remove parasite eggs and larvae from the environment. Pigs can become reinfected when returned to contaminated pens, bedding, soil or pasture.
A complete program should include regular manure removal, cleaning and drying of pens, control of overcrowding, quarantine of newly purchased pigs and treatment of all affected or exposed animals when advised by a veterinarian.
The effectiveness of a deworming program should also be monitored. Persistent coughing, poor growth, rough hair coats, diarrhea, scratching, crusted skin or repeated parasite problems may indicate reinfection, incorrect dosing, the wrong diagnosis or possible drug resistance.
Responsible Use of Agmectin
Agmectin should be used only for the species and parasites stated on its current registered label. The available product information identifies its indications for swine. It should not automatically be given to cattle, goats, poultry, dogs, cats or other animals simply because they can also be affected by parasites.
Different species process ivermectin differently, and the concentration and dosage of a swine feed product may be unsuitable for another animal. Agmectin is also strictly for veterinary use and must never be used by people.
A Practical Needle-Free Choice for Swine Farms
Agmectin combines ivermectin’s established antiparasitic action with the convenience of oral feed administration. For swine farms, its most important advantages include easier group treatment, less animal restraint, freedom from injection-site problems and reduced need for needles and syringes.
Oral ivermectin is not automatically better than injectable ivermectin in every situation. Its success depends on selecting the correct product, targeting susceptible parasites, estimating body weight accurately, mixing the medication properly and ensuring that every pig consumes its full dose.
When used responsibly as part of a complete farm parasite-control program, Agmectin Oral Ivermectin from Metrovet–Cargill can provide farmers with an effective, convenient and animal-friendly alternative to individual injections.
Veterinary reminder: This article is for educational purposes. Follow the current Agmectin package label, observe the stated slaughter-withdrawal period and consult a licensed veterinarian or qualified livestock technician when animals are sick, pregnant, severely infested or not eating normally.