u/PetarPolihronidis

My kid is:
Age: 16 months
Weight: ~11 kg

Question is regarding potential indirect environmental exposure to chlorambucil from a household cat receiving chemotherapy treatment.

My 8-year-old cat was recently diagnosed with small cell intestinal lymphoma and started treatment with:
- Prednisolone
- Chlorambucil (Leukeran) 2 mg tablets, 3x weekly

I also have a 16-month-old toddler at home.

I understand the standard precautions for handling chemotherapy medications (gloves, hand washing, careful litter cleaning, etc.), but I’m struggling to understand the REALISTIC risk of chronic low-level exposure in a household environment.

My concerns are things like:
- cat grooming saliva on fur
- possible urine traces after litter box use
- cat sleeping on couches/beds
- toddler hugging/kissing/petting the cat and then putting hands in mouth

I am NOT asking about direct ingestion of the tablets themselves. I understand that would require immediate medical attention.

I’m asking specifically about indirect environmental exposure from a cat receiving low-dose chlorambucil long term.

Is there any meaningful toxicology risk to a toddler from this kind of exposure over months/years, assuming normal hygiene and reasonable precautions?

I love this cat deeply and want to continue treatment, but I also need to make responsible decisions for my child’s safety. I would really appreciate input from anyone with medical/toxicology/pharmacology knowledge or experience with chemotherapy exposure precautions.

My 8-year-old cat was recently diagnosed with small cell intestinal lymphoma after months of tests, ultrasounds, bloodwork, surgery, and finally a biopsy/histology report from LABOKLIN confirming the diagnosis.

Over the last 6 months I went through absolute hell trying to save him. He went from 9 kg down to 4.5 kg and at one point I genuinely thought he was going to die. I’ve spent over €3000 so far on diagnostics, surgery, hospitalization, medications, special food, and veterinary care. Thankfully, after everything we’ve done, he is currently doing MUCH better:
- eating well
- active again
- no vomiting for weeks
- no diarrhea
- gained some weight back (~5 kg now)

I love this cat deeply. He has been with me through the hardest years of my life and I would never abandon him or “throw him away” because of an illness. That is NOT an option for me. I want to help him and give him the best possible life.

The treatment prescribed now is:
- Prednisolone
- Chlorambucil (Leukeran) 2 mg tablets
- 1 tablet Monday / Wednesday / Friday

My problem is that I also have a 16-month-old child at home.

And this is where I’m struggling emotionally and morally.

I understand chlorambucil is a chemotherapy/cytotoxic drug. I’ve read the precautions:
- gloves
- hand washing
- careful litter cleaning
- avoiding direct contact with the tablets

But what terrifies me is the possibility of long-term low-level exposure to my child.

My toddler constantly:
- hugs the cat
- kisses the cat’s fur
- touches surfaces
- puts hands in mouth

And my cat:
- grooms himself constantly
- sleeps on couches/beds
- walks around the apartment after using the litter box

I keep thinking:
- what if traces of the medication end up on the fur from saliva?
- what if tiny amounts are present in urine/feces?
- what if my child touches contaminated surfaces every day for months or years?

I know many people say the risk is “extremely low,” but when it comes to a chemotherapy drug and a baby/toddler, it’s very hard for me to relax and feel confident.

I’m trying to balance:
- protecting my child
- giving my cat a chance to live
- not isolating or emotionally distancing myself from a cat I love deeply

Because honestly, what kind of life is it for him if everyone is afraid to touch him?

At the same time, if there really IS any meaningful risk of serious illness to my child from long-term exposure, I obviously cannot ignore that either.

So I’m asking for honest, knowledgeable opinions from:
- veterinary oncologists
- toxicologists
- pharmacists
- oncology nurses
- people who treated cats with chlorambucil while having small children at home

How safe is this realistically?

Are normal interactions still considered safe?
- petting
- cuddling
- being on furniture
- occasional licking/grooming contact

Or is there truly a meaningful risk from chronic low-level exposure in a household environment?

I would genuinely be incredibly relieved and grateful if the consensus is that this can be managed safely with reasonable precautions. I really want to continue helping my cat if it’s realistically safe for my child.

Toxicology question: realistic toddler exposure risk from cat on chlorambucil chemotherapy?

I’m trying to save my cat, but I’m terrified about chemotherapy exposure to my toddler