Ivermectin Oral Suspension (Anhydrous)
Ivermectin is an FDA-approved preparation containing Ivermectin, for veterinary use. Available by prescription.
How to Give Anhydrous Oral Suspension
Oral Suspension (Anhydrous) is a liquid medication that does not contain water in its base. This might be an oil-based or other special base to help stabilize the medicine. It will look like a regular liquid medication, but often needs a good shake because the drug can settle. Here's how to give it:
- Shake well each time to mix the medication (5-10 seconds).
- Measure the dose using the syringe/dropper provided or one recommended by your vet. Insert the top of the oral syringe into the bottle adapter. Turn the bottle upside down and pull the plunger until the medicine reaches the volume required
- Hold your pet steady: a towel or helper can assist with squirmy pets.
- Administer the dose slowly into the side of the mouth. Allow small pauses if needed for swallowing.
- Raise the head slightly to help the medication go down and clean any spills with a little water or tissue.
- Praise your pet and offer a treat or water (unless advised against feeding right after).
- Clean the syringe with water immediately after use. Store the bottle as directed, out of sunlight.
- Consistency is key: Shake each time, measure accurately, and contact your vet if any issues arise.
Veterinarians most commonly consider ivermectin when a patient requires a management approach for internal parasites, such as heartworms, roundworms and lungworms or external parasites like mites and certain lice. It is frequently a point of discussion in routine wellness protocols and is often evaluated in the context of specific dermatological conditions where parasitic involvement is a clinical objective. By targeting the nervous system of susceptible invertebrates, your veterinarian can manage the parasitic landscape within and on the patient.
At a pharmacological level, ivermectin acts by binding with high affinity to glutamate-gated chloride channels found in invertebrate nerve and muscle cells. This binding leads to an increase in the permeability of the cell membrane to chloride ions, causing hyperpolarization of the nerve or muscle cell. The result is the paralysis and subsequent death of the parasite. Ivermectin is characterized by its broad spectrum of activity against many nematodes and arthropods, while typically spared from activity against flukes and tapeworms. Your veterinarian will determine whether ivermectin is appropriate for your pet based on their species, weight, health status and the results of diagnostic testing.
The actions described here reflect the product's FDA-approved labeling; your veterinarian determines the appropriate use for your animal.
Prescription only. Use only under the direction of a licensed veterinarian. This information is not a substitute for veterinary diagnosis, prescribing or monitoring.
Commonly observed effects of ivermectin administration include mild gastrointestinal changes, such as transient loose stools or a temporary decrease in appetite. In cases involving high parasitic burdens, owners may observe localized swelling or mild lethargy, which is often associated with the body’s physiological response to dying parasites rather than the medication itself. A significant clinical consideration involves certain dog breeds, such as Collies and Australian Shepherds, which may possess a genetic mutation (MDR1) that makes them more sensitive to the neurological effects of ivermectin. Your veterinarian will weigh breed-specific factors when evaluating if this prescription is appropriate for your dog.
This medication is typically used with extra caution or avoided in very young animals or those with a compromised blood-brain barrier. It is also carefully evaluated in pregnant or lactating animals, as its influence on developing offspring is a point of clinical consideration. Before starting a protocol involving ivermectin, ensure your veterinarian has a complete history of all other medications and supplements your pet is receiving, as it may interact with other central nervous system agents. Contact your veterinarian promptly if you observe significant tremors, dilated pupils, persistent weakness or signs of an allergic reaction during the administration period.
Yes. Ivermectin is a prescription medication and can only be dispensed by a licensed pharmacy like Mixlab upon receipt of a valid authorization from a licensed veterinarian. Mixlab verifies all prescriptions before any medication is prepared or sent to your home or stable.
Yes. While ivermectin is available in various commercial tablets, chewables and pastes, Mixlab can compound this medication into specialized strengths or alternative formats—such as flavored oral liquids or treats—if your veterinarian determines a customized preparation better suits your pet's needs. The decision between a commercial and compounded product rests with the prescribing veterinarian.
Some breeds, including Collies, Shelties and Australian Shepherds, may carry a genetic mutation known as MDR1 that affects how medications move in and out of the brain. Veterinarians discuss this sensitivity because even standard doses of ivermectin can lead to neurological concerns in dogs with this specific genetic profile.
Veterinarians frequently consider ivermectin as an active component in many heartworm prevention protocols. When used at the specific, low doses determined by your veterinarian for prevention, it acts on the larval stages of the heartworm to manage the infection before it reaches maturity.
