Choosing the Best Chemotherapy Treatment for Your Dog’s Lymphoma

Chemotherapy can be the most effective way to treat lymphoma in dogs, as it provides the highest chance for remission and extended survival. Since lymphoma generally affects multiple areas in the body, chemotherapy works by delivering medicine throughout the entire system, maximizing the potential for success.

Unlike humans, dogs typically respond well to chemotherapy with fewer severe side effects. This is because veterinary oncology prioritizes quality of life over aggressive treatment, meaning dogs undergo less intense chemotherapy protocols to avoid significant discomfort.

Types of Chemotherapy Protocols for Dogs with Lymphoma

Each dog’s treatment plan may differ depending on their cancer type and progression. Below are some common chemotherapy options that veterinarians may recommend:

Single-Drug Treatments

• Prednisone: This steroid helps manage inflammation and can shrink lymph nodes, boosting appetite and energy levels. However, it’s less effective as a standalone treatment and may cause chemotherapy resistance if used before other drugs.
• Doxorubicin: Known as "Red Devil," this drug can be used alone or in combination with other chemotherapy agents for B-cell lymphoma, achieving remission rates of 74-88%.
• Laverdia® (Verdinexor): This FDA-approved oral tablet is effective but not as strong as multi-drug treatments. It’s a good middle ground for pet owners seeking more than Prednisone without the intensity of traditional chemotherapy.
• Chlorambucil (Leukeran®): Primarily used for indolent lymphoma and chronic leukemia, Chlorambucil is ideal for dogs who cannot tolerate certain drugs. It works by disrupting DNA strands and slowing cancer spread.
• L-asparaginase: This enzyme-based drug "starves" cancer cells of nutrients, slowing their growth and division. However, close monitoring is required due to potential side effects on organs like the liver and pancreas.
• Tanovea® (Rabacfosadine): Specifically developed for dogs, this drug targets rapidly dividing lymphoma cells and shows positive results even in cases resistant to conventional treatments.

Multi-Agent Treatments

Multi-agent protocols are often considered more effective than single-drug options for achieving remission and extending survival times.

• CHOP Protocol: Known as the "gold standard," CHOP combines Cyclophosphamide, Doxorubicin, Vincristine, and Prednisone. It’s highly effective for multicentric lymphoma and is administered over 15-25 weeks to prevent cancer cell resistance.
• COP Protocol: This plan includes Cyclophosphamide, Vincristine, and Prednisone, but excludes Doxorubicin. COP may be preferable for dogs with heart conditions who cannot tolerate Doxorubicin, providing a remission time of 6-9 months on average.
• LOPP Protocol: Designed for high-grade T-cell lymphomas, LOPP includes Lomustine, Vincristine, Prednisolone, and Procarbazine, offering a more targeted approach for these difficult-to-treat cancers.

Relapse Treatments

If a dog relapses after achieving remission, they may require a new treatment plan or a repeat of a successful protocol like CHOP. In some cases, alternative protocols such as MOPP (Mustargen, Vincristine, Prednisone, Procarbazine) are used, providing a second chance for remission.

Which Protocol Is Right for Your Dog?

Selecting the best chemotherapy treatment depends on your dog’s overall health, the cancer’s severity, and your family’s preferences and budget. Discussing all available options with a veterinary oncologist can help determine the best course of action to manage your pet’s lymphoma effectively. With a carefully chosen treatment, your dog can maintain a good quality of life and have the best possible chance for recovery.

ImpriMed — which is based in Silicon Valley — has developed its lab to go further than just identifying the type of lymphoma that your pet has. They have the added option of a Personalized Prediction Profile, which includes a CHOP response prediction.

This prediction allows ImpriMed to inform both pet parents and your vet what the best route of action would be, as well as what the outcomes are likely to be based on cellular response to our tests combined with artificial intelligence.