Dantrolene/DMSO Oral Suspension (Anhydrous)

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:

1. Shake well each time to mix the medication (5-10 seconds).
2. 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
3. Hold your pet steady: a towel or helper can assist with squirmy pets.
4. Administer the dose slowly into the side of the mouth. Allow small pauses if needed for swallowing.
5. Raise the head slightly to help the medication go down and clean any spills with a little water or tissue.
6. Praise your pet and offer a treat or water (unless advised against feeding right after).
7. Clean the syringe with water immediately after use. Store the bottle as directed, out of sunlight.
8. Consistency is key: Shake each time, measure accurately, and contact your vet if any issues arise.

This compounded formulation combines dantrolene, a skeletal muscle relaxant, with DMSO, a solvent and penetration enhancer. In compounding practice, clinicians may consider a combination like this when a topical, solvent-based delivery to skeletal muscle is a consideration. Your veterinarian determines whether it is appropriate based on your horse's status and the situation being managed.

At a pharmacological level, dantrolene is a postsynaptic muscle relaxant that interferes with the release of calcium ions from the sarcoplasmic reticulum; by modulating intracellular calcium, it influences skeletal muscle contraction. DMSO acts as a carrier and solvent that facilitates the movement of co-administered ingredients through biological membranes and it has been studied for free-radical scavenging properties.

This description reflects the general pharmacology of the active ingredient's drug class; your veterinarian determines whether this approach is appropriate 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. Compounded drugs are not approved by the FDA for safety or effectiveness.

Commonly observed effects of dantrolene/DMSO administration include mild sedation, temporary muscle weakness or localized skin irritation at the site of application. Because the formulation contains DMSO, owners may observe a characteristic garlic-like odor on the horse’s breath or skin shortly after use, which is a transient metabolic response. It is essential to ensure the horse remains well-hydrated during therapy, as both components are processed through the kidneys and liver. If you observe significant stumbling, persistent lethargy or signs of physical distress, contact your veterinarian promptly.

This medication is typically used with extra caution or avoided in patients with pre-existing liver or kidney impairment or those with known cardiovascular compromise. Because DMSO can facilitate the absorption of environmental contaminants, the application site must be clean and free of other topical substances. Protective gloves should be worn by the person administering the medication to prevent accidental absorption. Ensure your veterinarian has a complete history of all other prescriptions and supplements your horse is receiving, as interactions with other muscle relaxants or sedative agents are a point of clinical consideration. Your veterinarian is the right person to assess your horse's individual profile and provide specific guidance on environmental management during the recovery window.