Thiamine, Colostrum, L-Theanine, L-Tryptophan
What is thiamine, colostrum, L-theanine, L-tryptophan?
Thiamine, colostrum, L-theanine, and L-tryptophan are components of a nutritional supplement (Composure-Pro®) used to treat anxiety and stress-related behavioral concerns in dogs and cats.
The U.S. Food and Drug Administration (FDA) does not review non-drug health supplements (e.g., herbals, nutraceuticals, shampoos, and other supplements) for safety or effectiveness before they are sold to the public. Manufacturers of non-drug health supplements must ensure their supplements are safe and labeled accurately.
The FDA requires that these non-pharmaceuticals contain a disclaimer that says, “This supplement is not intended to diagnose, treat, cure or prevent any disease.” Health Canada licenses “veterinary health supplements” after reviewing safety, efficacy, and manufacturing information provided by the manufacturer. These supplements are not tested by Health Canada.
Your veterinarian is the best source of information about the safety of non-drug health supplements in pets. Just because a supplement is natural does not mean it is safe. All medicines and medicinal plants are potentially toxic if used inappropriately or given at high doses.
Supplements can also have side effects, like pharmaceuticals. Few supplements and herbs have been subjected to rigorous scientific trials to determine their efficacy.
Although the information in this handout may be helpful, it may also be incomplete and may not represent the full range of effects the supplement could have on your pet.
How do I give my pet thiamine, colostrum, L-theanine, and L-tryptophan?
- This supplement is given orally (by mouth) and comes as a palatable, chewable tablet, as well as a liquid format.
- Tablets may be given with or without food.
- Measure liquid forms carefully with the provided syringe.
- Follow your veterinarian’s directions and use supplements according to their label.
- Ideally, give this supplement at the same time daily.
- Ensure access to fresh, clean drinking water.
- Wash your hands after handling.
- Do not handle if you have a known sensitivity to this supplement.
This supplement should take effect quickly (within 30 minutes) and improvement in clinical signs should follow.
What if I miss giving my pet the supplement?
If you miss a dose, do it as soon as you remember. However, if it is almost time for the next scheduled treatment, skip the missed treatment and resume the regular dosing schedule. Do not give the pet two doses at once.
Are there any potential side effects from thiamine, colostrum, L-theanine, and L-tryptophan?
- There no documented side effects from thiamine, colostrum, L-theanine, and L-tryptophan.
- Oral supplements have the potential to cause mild gastrointestinal symptoms such as loose stools, flatulence, and stomach upset. If this occurs, contact your veterinarian.
- Sensitivities can develop over time with repeated exposure. Your pet may have no reaction after the first few doses but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment.
- Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately.
This short-acting drug/supplement should stop working within 24 hours, although effects can be longer in pets with liver or kidney disease.
Are there any risk factors for this supplement?
DO NOT USE thiamine, colostrum, L-theanine, and L-tryptophan in:
- Pets who are allergic to it or to any of the ingredients in the supplement.
Contact your veterinarian if your animal's condition does not improve or worsens despite this treatment.
Are there any drug interactions I should be aware of?
There are no documented drug interactions for this medication. Make sure your veterinarian is aware of any medications (including vitamins, supplements or herbal therapies) that your pet is taking before starting any new treatment.
Is any monitoring needed with this supplement?
- At home, monitor for any abnormal changes. If any occur, discontinue the supplement and contact your veterinarian.
- Your veterinarian will let you know when they want to reassess your pet to ensure the supplement is working and not causing side effects.
How do I store thiamine, colostrum, L-theanine, and L-tryptophan?
- Ensure oral supplements are stored in a cool, dry area in tightly sealed containers to prevent accidental ingestion.
- Keep out of reach of children.
What should I do in case of emergency?
If you suspect an overdose or an adverse reaction to the supplement/treatment, call your veterinary office immediately. If they are not available, follow their directions in contacting an emergency facility. Be prepared to provide information about the product and your pet's weight and symptoms.
Adverse effects should also be reported to the FDA or Health Canada.
© Copyright 2025 LifeLearn Inc. Used and/or modified with permission under license. This content written by LifeLearn Animal Health (LifeLearn Inc.) is licensed to this practice for the personal use of our clients. Any copying, printing or further distribution is prohibited without the express written consent of LifeLearn. This content does not contain all available information for any referenced medications and has not been reviewed by the FDA Center for Veterinary Medicine, or Health Canada Veterinary Drugs Directorate. This content may help answer commonly asked questions, but is not a substitute for medical advice, or a proper consultation and/or clinical examination of your pet by a veterinarian. Please contact your veterinarian if you have any questions or concerns about your pet’s health. Last updated on May 2, 2025.