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Is secondhand marijuana smoke from neighbors harmful to indoor cats?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 7 years and 5 months old | 12.45 lbs

My downstairs neighbor smokes marijuana in his apartment and the smell comes into my apartment via the vents and cracks. I’ve complained to the landlord but it’s legal where I live and not much can be done. I have indoor cats. Is their health at risk?

1 Answer

Most Helpful Answer

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Answered By Debi Matlack

Veterinary Technician

Published on January 8th, 2020

There is little danger of your cats being endangered by the smoke unless it is concentrated and they are forced to breathe it. However, symptoms of marijuana intoxication in cats include extreme sleepiness or excitation, hypersalivation, dilated pupils, or low blood pressure. Additional symptoms most commonly observed include: Uncoordination, falling over Depression, sometimes alternating with agitation or anxiety Vomiting Bradycardia (slow heart rate) Seizures, sometimes coma If your cat demonstrates any of the symptoms above, you should take it to the veterinarian as soon as possible. Consider having a civil conversation with your downstairs neighbor about the smoke. If he's smoking so much that the smell is filling your apartment you might want to discuss maybe restricting his smoking to certain times or taking it outside sometimes so that you and your cats aren't having to smell it all the time.

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