Is Pseudolithos cubiformis toxic to cats?

Mildly. The ASPCA lists pseudolithos cubiformis as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Pseudolithos is not individually listed by the ASPCA, so its status is uncertain; treat with caution and verify with a vet. As a milkweed-family (Apocynaceae) succulent its sap may be mildly irritating, and it must not be asserted as pet-safe without an ASPCA listing. Its rarity means it is unlikely to be encountered by pets, but keep it out of reach.

Pseudolithos is not individually listed by the ASPCA, so its status is uncertain; treat with caution and verify with a vet. As a milkweed-family (Apocynaceae) succulent its sap may be mildly irritating, and it must not be asserted as pet-safe without an ASPCA listing. Its rarity means it is unlikely to be encountered by pets, but keep it out of reach. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to pseudolithos cubiformis.

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 in the US, or Animal PoisonLine on 01202 509 000 in the UK and follow their advice; a leaf or photo helps the vet treat it correctly.

The ASPCA classification Growli uses applies to both cats and dogs: Pseudolithos cubiformis is mildly toxic to dogs as well. See the full pseudolithos cubiformis pet-safety guide for both species.

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.