One chemotherapy session for a cat costs $150-400 in the US, £120-330 in the UK and ¥400-1,200 in China. A full protocol is 12-25 sessions, so the realistic total is $2,400-8,000, and supportive care adds another 20-30% on top of that. The drug is rarely the expensive part; the bloodwork, the chair time and the anti-nausea drugs are.
What one session actually contains
A session is not one injection on a bill. It is a pre-treatment blood count, a weight and body condition check, a calculated dose by body surface area, the drug itself, 30-90 minutes of observation for a reaction, and take-home anti-nausea medication. A doxorubicin visit takes 2-3 hours of the day even though the infusion runs 20-30 minutes.
Body surface area, not body weight, sets the dose: a 4.5 kg cat is about 0.29 square metres. That is why a 5.5 kg cat gets roughly 20% more drug than a 4.5 kg cat, and why weight loss during a protocol reduces cost as well as toxicity.
Per-session prices by country
The table below is what owners are quoted for a single intravenous session at a practice that does chemotherapy routinely. Emergency clinics and university hospitals sit at the top of every range.
| Item per visit | US (USD) | UK (GBP) | China (CNY) |
|---|---|---|---|
| Single-agent session (e.g. doxorubicin) | 150-400 | 120-330 | 400-1,200 |
| Multi-drug session (CHOP cycle) | 180-450 | 150-380 | 500-1,400 |
| Pre-treatment CBC | 60-150 | 45-120 | 80-260 |
| Anti-nausea drugs, 3-5 days | 30-90 | 25-80 | 60-250 |
| Echocardiogram before doxorubicin | 250-450 | 200-400 | 400-900 |
Read the columns as local prices, not conversions. At $1 = £0.82 = ¥7.1, a $300 session is about £246 or ¥2,130 — close to the middle of the UK range and near the top of the Chinese one, which is why owners in China sometimes pay a larger share of income for the same protocol.
Protocol totals: the 12-25 session math
Multiply before you commit. Twelve sessions at $150 is $1,800; twenty-five at $400 is $10,000. Most lymphoma protocols land between those poles at $3,000-7,000 for the course, because the cheaper oral phases offset the expensive intravenous ones.
A 16-week CHOP-type protocol is usually 16-19 treatments: weekly for the first 9 weeks, then every 2 weeks, then every 3-4 weeks. A simpler COP protocol runs 12-16 treatments over 12-16 weeks and costs 30-40% less, with a shorter first remission. Oral chlorambucil for small-cell lymphoma is a different shape: $40-120 a month at home for 12-24 months, with a blood count every 4-8 weeks at $60-150.
| Protocol shape | Sessions | US total (USD) | UK total (GBP) | China total (CNY) |
|---|---|---|---|---|
| COP, 12-16 weeks | 12-16 | 1,800-4,500 | 1,450-3,700 | 4,800-14,000 |
| CHOP, 16-25 weeks | 16-19 | 3,000-7,500 | 2,400-6,200 | 8,000-24,000 |
| Single-agent doxorubicin | 4-6 | 600-2,400 | 500-2,000 | 1,600-7,200 |
| Oral chlorambucil, 12 months | 0 visits | 480-1,440 | 400-1,200 | 1,200-4,000 |
Monthly cost is the number to compare with income: a $3,000-7,000 course spread over 4-6 months is $500-1,400 a month. That monthly figure, not the headline total, is what most households actually have to budget.
Supportive care: the 20-30% nobody quotes
Supportive care is 20-30% of the protocol price, and it is not optional. On a $3,000 course that is $600-900; on $7,000 it is $1,400-2,100. It covers anti-nausea drugs (maropitant or ondansetron, $30-90 per cycle), appetite stimulants (mirtazapine, $15-40 a month), gastroprotectants, antibiotics for a neutropenic fever, and prescription recovery diets at $3-6 a day.
One hospitalisation changes the arithmetic completely: a 2-day stay for febrile neutropenia is $800-2,500, which can equal 5-8 routine sessions. That is why the blood count before each dose matters more than the drug brand. Most protocols hold treatment when the neutrophil count falls under 1,500/µL, and a dose delay costs nothing while a fever costs a lot.
Remission is 6-12 months, not a cure
For the common feline lymphomas, a good protocol buys a first remission of 6-12 months, with median survival around 9-12 months in most published veterinary experience. Untreated, the same cats typically have 4-6 weeks. So the honest reading of a $5,000 course is roughly 6-12 good months, at $400-900 per added month on a $5,000 course spread over 12 months.
That framing is not a reason to refuse treatment. It is the reason to ask for a written protocol with the number of visits and the stop rules before the first dose, because a plan that quietly becomes 30 sessions and two hospitalisations is the one that breaks a budget.
The tests that gate each dose
Every intravenous cycle needs a CBC 24-48 hours before, at $60-150. A biochemistry panel every 4-8 weeks adds $70-160. An echocardiogram before the first doxorubicin, and again at a cumulative dose near 180-240 mg/m², adds $250-450 each time — doxorubicin is cardiotoxic in cats at high cumulative doses, and the echo is how that ceiling is tracked.
Ask for the cumulative dose number in writing at each visit. It is the single value that decides whether the next doxorubicin is safe, and it costs nothing to record. If a practice cannot produce it, that is a reason to move.
When the money is not the only axis
Cost is one column of a decision that also includes travel time, the cat's temperament in a carrier, and how many visits the household can actually make. A 16-visit protocol means 16 half-days off work; at 3 hours per visit that is 48 hours, and for some households that is the real constraint, not the $5,000.
Discuss a rescue protocol before starting, not after: prednisolone alone at $10-25 a month can hold some cats for 4-8 weeks and is a legitimate palliative choice, especially for a cat that hates the car. Advanced care such as transfusion or dialysis is priced on a different scale entirely (see transfusion and dialysis costs).
Five steps before the first dose
- Ask for the protocol in writing: drug names, number of visits, interval, and the total at each stage.
- Multiply sessions by per-session price yourself, then add 20-30% for supportive care.
- Get the cumulative doxorubicin dose recorded at visit one, and ask what the ceiling is.
- Budget the monitoring separately: $60-150 per CBC, $250-450 per echo.
- Agree the stop rules in advance — two unplanned hospitalisations, or loss of appetite for 3 days, are common lines. Routine care still runs alongside (see vet visit frequency and cost, and run your own numbers in the cost calculator).
Frequently asked
Why does one chemo session cost $150-400 when the drug is cheap?
Because the drug is the smallest line on the bill at $30-120 for most agents. The rest is pre-treatment bloodwork at $60-150, 30-90 minutes of monitored infusion time, the pharmacy and waste handling, and take-home anti-nausea drugs at $30-90 per cycle. A 2-3 hour visit for a 20 minute infusion is normal.
How much does a full course of feline chemotherapy cost in total?
Most lymphoma protocols run 12-25 sessions at $150-400 each, so $1,800-10,000 before supportive care, with typical courses at $3,000-7,000. Add 20-30% for anti-nausea drugs, appetite stimulants, antibiotics and recovery diets, and about $60-150 per blood count.
What remission length does the money buy?
For common feline lymphomas, a good multi-drug protocol gives a first remission of 6-12 months and median survival around 9-12 months, against 4-6 weeks untreated. It is not a cure, so ask for the protocol, the visit count and the stop rules in writing before the first dose.