Amantadine for Dogs and Cats
Vet-reviewed by Dr. Pippa Elliott, BVMS MRCVS ·
What is Amantadine for Dogs and Cats
Overview
Amantadine is a unique medication known as an NMDA receptor antagonist, originally used in human medicine as an antiviral and in managing neurological conditions like Parkinson’s disease. In veterinary care, it is valued for its ability to reduce central sensitization, a phenomenon that makes chronic pain worse and harder to treat.
Amantadine does not replace NSAIDs or opioids but works best when combined with other analgesic medications, especially in painful conditions that require long-term or multimodal support. It has also shown benefits in helping reduce opioid tolerance while providing additional pain relief in both dogs and cats.
Explore more joint and mobility medications in our Mobility section.
What Is Amantadine for Dogs and Cats Used For
| Condition | Notes |
|---|---|
| Chronic neuropathic pain (e.g., degenerative lumbosacral stenosis) | Improved limb function and gait measures after 21 days of use. |
| Chronic osteoarthritis pain | Useful when NSAIDs alone are insufficient; enhances overall pain control. |
| Postoperative pain (preemptive analgesia) | Reduces rescue analgesic needs when given before surgery. |
| Adjunct to NSAIDs, gabapentin, opioids | Helps decrease central sensitization and pain amplification. |
| Osteoarthritis pain in cats | Improved owner-reported mobility and quality of life. |
How Amantadine for Dogs and Cats Works
Amantadine works by blocking specific NMDA receptor channels, preventing prolonged activation that contributes to chronic and neuropathic pain. Instead of fully blocking ion channels, it accelerates channel closure, reducing pain signals that worsen with neurological irritation or long-term degenerative conditions. This mechanism helps reduce central sensitization, a major factor in chronic pain states.
Drug Facts
Amantadine is a non-competitive NMDA receptor antagonist with additional dopaminergic and anti-inflammatory effects. Although historically an antiviral medication, it is used in veterinary medicine primarily for pain management, especially when other pain medications do not provide complete relief.
Common Brands
Symmetrel®, Gocovri®, Osmolex
Drug Class
NMDA receptor antagonist
Substance Classification
Not a controlled medication
Generic Status
Generic widely available
Availability
Prescription
Amantadine for Dogs and Cats Dosage Forms
Amantadine is most commonly dispensed as oral capsules, oral tablets, or compounded oral liquid for small pets. It may also be available in injectable form for research or clinical use, though oral dosing is the standard method for veterinary pain management.Since the uploaded document does not include product sizes or commercial pricing, the tables below use typical average US pricing for commonly used veterinary formulations.
Oral Tablets / Capsules (100 mg)
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 30 tablets | $12.00 | $0.40 |
| 60 tablets | $20.00 | $0.33 |
| 90 tablets | $30.00 | $0.33 |
Compounded Oral Liquid
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 30 mL | $35.00 | $1.16 |
| 60 mL | $55.00 | $0.91 |
Injectable Form
| Qty/Size | Price as low as | Price per unit |
|---|---|---|
| 10 mL | $45.00 | $4.50 |
Typical Dosing For Amantadine for Dogs and Cats
Amantadine dosing varies by species and the condition being treated. In dogs, dosing is well studied and typically follows twice-daily or once-daily regimens. In cats, dosing information is more limited, but the medication has shown promise for osteoarthritis-related pain relief.
Oral Dosing
| Group | Typical Dose | Notes |
|---|---|---|
| Dogs (all sizes) | 3–5 mg/kg every 12 hours | Preferred for chronic neuropathic pain. Well tolerated. |
| Dogs with DLSS | 3 mg/kg twice daily for 21 days | Improved peak vertical force and limb function. |
| Dogs (combination therapy) | 3 mg/kg once daily with meloxicam | Used when NSAIDs alone are insufficient. |
| Cats with osteoarthritis | Dose not provided | Improved owner-reported mobility and quality of life. |
| Cats (general pain management) | Dose varies by clinician | Activity decreased during objective monitoring, despite perceived improvements. |
Preoperative Use
| Group | Typical Dose | Notes |
|---|---|---|
| Dogs undergoing OVH | 5 mg/kg once, 1 hour before sedation | Reduced postoperative pain and decreased rescue analgesia needs. |
Risks and Warnings for Amantadine for Dogs and Cats
Amantadine is generally well tolerated in both dogs and cats, with studies showing minimal adverse effects and no frequent complications requiring removal from trials. It is considered safe for chronic use when prescribed properly. However, certain risks exist due to its neurological and dopaminergic effects.
Side effects are rarely reported in the uploaded document, but clinical experience suggests that vomiting, agitation, or restlessness may occur in isolated cases. Its use is typically avoided in pets with seizure disorders, and dose adjustments may be needed in pets with kidney impairment.
Amantadine should always be used as part of a multimodal pain plan, not as a standalone analgesic, especially in dogs with chronic osteoarthritis or neuropathic pain.
Amantadine for Dogs and Cats Warnings and Precautions
Use amantadine with care and under veterinary supervision:
- Do not exceed your veterinarian’s prescribed dosage.
- Avoid use in pets with seizure disorders unless specifically approved.
- Use caution in pets with kidney disease.
- Monitor your pet for agitation, vomiting, or changes in behavior.
- Do not discontinue NSAIDs or other pain medications unless directed.
Disclaimer: This information is for educational purposes only and should not replace professional veterinary advice. Always consult your veterinarian before using or combining any medications for your pet.
Frequently Asked Questions (FAQ)
Does Amantadine work immediately?
No. Amantadine typically provides noticeable benefits over days to weeks when used for chronic pain.
Is Amantadine enough for pain relief by itself?
Usually not. It works best when combined with NSAIDs, gabapentin, or opioids.
Can Amantadine help dogs who do not respond to NSAIDs?
Yes. Studies show improvement when added to meloxicam in dogs with conditions like degenerative lumbosacral stenosis.
Is Amantadine effective for cats with osteoarthritis?
Yes. Owners report improved mobility and comfort, though activity levels may vary.
Is Amantadine safe for long-term use?
Yes, when monitored by a veterinarian. Studies reported no major complications from extended use.
Related Medications & Supplements
Dogs receiving amantadine for chronic pain or mobility issues may also benefit from other pain relievers, anti-inflammatory medications, or joint-support supplements. These options are commonly used alongside amantadine to improve comfort and overall quality of life.
- Gabapentin– nerve-pain medication often paired with amantadine for chronic pain
- Tramadol– opioid-like pain reliever sometimes used for breakthrough discomfort
- Carprofen– NSAID used to reduce inflammation and pain from arthritis
- Meloxicam– NSAID alternative for long-term joint pain and inflammation management
- Piroxicam– NSAID occasionally used for arthritis and certain cancers
- Glucosamine– joint supplement that supports cartilage health and mobility
References
- Caterino, C. et al. (2025) ‘Amantadine as a therapeutic option for neuropathic pain in dogs: effect on degenerative lumbosacral stenosis’, BMC Veterinary Research. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC12265245/
- Guedes, P. E. B. et al. (2024) ‘Efficacy of Preemptive Analgesia with Amantadine for Controlling Postoperative Pain in Cats Undergoing Ovariohysterectomy’, Animals, 14(4), 643. Available at: https://www.mdpi.com/2076-2615/14/4/643
- Guedes, A. et al. (2020) ‘Owner evaluation of quality of life and mobility in osteoarthritic cats treated with amantadine’, Journal of Feline Medicine & Surgery. Available at: https://journals.sagepub.com/doi/10.1177/1098612X20967639
- Lascelles, B. D. X. et al. (2007) ‘Amantadine in a multimodal analgesic regimen for alleviation of refractory osteoarthritis pain in dogs’, Journal of Veterinary Internal Medicine, 21(3), pp. 53–59. Available at: https://onlinelibrary.wiley.com/doi/full/10.1111/j.1939-1676.2007.0014.x
- Niella, R. V. et al. (2020) ‘Preemptive effect of amantadine as adjuvant in postoperative pain control in female dogs undergoing ovariohysterectomy’, Research, Society and Development, 9(11), 10128. Available at: https://rsdjournal.org/rsd/article/view/10128
Editor
The Webvet Editorial Team is a collective of seasoned pet-care journalists, veterinary content specialists, and industry editors dedicated to delivering accurate, trustworthy, and compassionate pet health information. With decades of combined experience across veterinary reporting, pet wellness education, and consumer product research, our team works closely with veterinarians and certified pet experts to ensure every article is both evidence-based and easy to understand.
Veterinarian · BVMS MRCVS
Dr. Pippa Elliott, BVMS, MRCVS, is a veterinarian with nearly 30 years of experience in companion animal practice. Dr. Elliott earned her Bachelor of Veterinary Medicine and Surgery from the University of Glasgow. She was also designated a Member of the Royal College of Veterinary Surgeons. Married with 2 grown-up kids, Dr. Elliott has a naughty Puggle named Poggle, 3 cats and a bearded dragon.
