Dantrolene Paste

Paste medications are thick and sticky, usually given by mouth using a syringe or tube. They’re often used for dewormers or other oral meds in horses, dogs, and cats. The key is to aim for the back of the mouth so your pet swallows the paste instead of spitting it out.

For Horses:

1. Set the dose on the syringe if it has markings (usually based on weight).
2. Stand beside your horse, not in front, and have someone hold them if possible.
3. Gently insert your thumb into the side of the horse’s mouth (between the teeth) to open it.
4. Insert the syringe into that gap and squirt the paste toward the back of the tongue.
5. Lift the horse’s head slightly and encourage swallowing by stroking the throat or gently blowing on the nostrils.
6. Watch for licking or chewing—that means they swallowed. If paste spills out, check how much was lost and contact your vet if unsure.
7. You can offer a little water afterward and reward them with a treat like a carrot if allowed.

For Dogs & Cats:

1. Gently open your pet’s mouth or slip the syringe into the side of it.
2. Aim toward the back of the tongue and squirt the paste in.
3. Hold the mouth closed briefly, and rub the throat or blow gently on the nose to encourage swallowing.
4. Give praise or a treat afterward to make it a positive experience.

Aftercare:

1. Wipe your pet’s mouth if needed.
2. Clean or recap the syringe as instructed.
3. Store the tube according to label directions.

Tip: Paste can feel weird to pets at first. For horses, try giving applesauce by syringe ahead of time so they get used to the sensation.

The uses and pharmacology described below reflect the FDA-approved labeling for this active ingredient; your veterinarian determines whether and how they apply to your animal's treatment plan.

Veterinarians most commonly consider dantrolene when a patient exhibits signs of severe muscle rigidity or when managing specific urinary conditions related to urethral sphincter hypertonicity. In equine medicine, it is frequently a point of clinical discussion for horses with a history of exertional rhabdomyolysis (tying-up). Furthermore, dantrolene is a primary pharmacological intervention for malignant hyperthermia, a rare but life-threatening metabolic reaction that can occur under general anesthesia. By modulating the release of ions within the muscle fibers, your veterinarian can manage the physiological state of the patient’s skeletal muscles during periods of acute stress.At a pharmacological level, dantrolene acts as a direct-acting muscle relaxant by targeting the ryanodine receptor within the sarcoplasmic reticulum of skeletal muscle cells. Compared with other muscle relaxants that act on the central nervous system, dantrolene specifically inhibits the release of calcium ions into the sarcoplasm. Since calcium is the primary trigger for muscle contraction, sequestering these ions may be considered in cases where the concern involves the persistent cross-bridge cycling that leads to muscle stiffness or heat production. It has little to no effect on smooth or cardiac muscle at therapeutic levels, allowing it to remain selective for skeletal muscle tissues. Your veterinarian will determine the appropriate use of dantrolene based on your pet’s weight, species and the specific neuromuscular management objectives.

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 administration include mild sedation, generalized muscle weakness and dizziness. In some animals, localized gastrointestinal changes such as vomiting or loose stools may occur shortly after the medications are administered. Because dantrolene is primarily processed by the liver, your veterinarian may recommend periodic monitoring of hepatic enzymes, particularly during long-term protocols. If you observe significant stumbling, persistent lethargy or signs of jaundice (yellowing of the eyes or gums), contact your veterinarian promptly.This medication is typically used with extra caution or avoided in patients with known hepatic impairment or significant cardiovascular disease. It is also carefully evaluated in pregnant or lactating animals, as the safety profile for developing offspring is a point of professional consideration. Before starting a protocol involving dantrolene, ensure your veterinarian has a complete history of all other prescriptions and supplements your pet is receiving, as it may interact with calcium channel blockers or other sedative agents. Your veterinarian is the right person to assess your pet's individual health status and provide guidance on the necessary monitoring to ensure the management approach remains suitable.