
B-Quiet (Tryptophan + Magnesium Chloride + Thiamine + Calcium Levulinate + Pyridoxine) is a compounded formulation containing Tryptophan + Magnesium Chloride + Thiamine + Calcium Levulinate + Pyridoxine, prepared by Mixlab for veterinary use. Available by prescription.
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:
For Dogs & Cats:
Aftercare:
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.
This is a compounded preparation combining the active ingredients listed in the product name. In compounding practice, clinicians may consider a multi-ingredient preparation like this to address more than one aspect of a patient's physiology at once. Your veterinarian determines whether it is appropriate for your animal.
At a pharmacological level, the components of B-Quiet act through several integrated pathways within the central and peripheral nervous systems. Tryptophan is the primary metabolic precursor to serotonin, an inhibitory neurotransmitter studied for its role in regulating emotional stability and sleep patterns. Magnesium chloride provides essential magnesium ions, which act as a natural calcium channel blocker at the neuromuscular junction, modulating muscle fiber excitability. Thiamine (Vitamin B1), pyridoxine (Vitamin B6) and calcium levulinate function as critical cofactors in the carbohydrate metabolism and the synthesis of neurotransmitters like gamma-aminobutyric acid (GABA). Your veterinarian will determine the appropriate application of B-Quiet based on your horse's weight, diet and the specific nature of the metabolic support required.
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 B-Quiet administration include mild sedation, temporary muscle relaxation or localized irritation at the site of injection. Because the formulation contains magnesium and calcium, your veterinarian will typically administer the medication slowly to ensure cardiovascular stability during the infusion. In some horses, owners may observe transient lethargy or a change in appetite shortly after the medications are administered. If you observe significant stumbling, persistent weakness or signs of an acute allergic reaction, contact your veterinarian promptly.
This medication is typically used with extra caution or avoided in patients with known renal impairment or significant cardiovascular disease, as the mineral components are primarily processed and excreted through the kidneys. It is also carefully evaluated in patients receiving other prescriptions that influence serotonin levels to avoid the risk of metabolic interactions. Before starting a protocol involving B-Quiet, ensure your veterinarian has a complete history of all other supplements and prescriptions your horse is receiving. Your veterinarian is the right person to assess your horse's individual health status and provide guidance on the timing of administration relative to competition or travel to ensure the management approach remains suitable.
Yes. B-Quiet is a prescription formulation and can only be dispensed by a licensed pharmacy upon receipt of a valid authorization from a licensed veterinarian. Mixlab verifies all authorizations before any preparation is dispensed.
Yes. While individual components are available commercially, Mixlab can compound this specific combination into specialized concentrations or alternative delivery forms if your veterinarian determines a customized preparation better suits your horse's needs. The decision between a commercial and compounded product rests with the prescribing veterinarian.
Veterinarians discuss the inclusion of magnesium because it plays a vital role in regulating neuromuscular signaling and muscle contraction. By supporting normal magnesium levels, it is considered as part of a management approach for horses that exhibit signs of muscle tension or nervous system hypersensitivity.
Tryptophan is an essential amino acid that the body uses to synthesize serotonin, a neurotransmitter associated with calm behavior and mood regulation. Veterinarians consider its inclusion in B-Quiet to provide the necessary building blocks for natural neurotransmitter production during stressful events.




