Answer Hi Emma. If you are referring to lubricant treatments such as Laxatone and Petromalt, then yes, they certainly can cause diarrhea. In fact, they are also prescribed in some cases to relieve constipation. Not sure if you are asking the question in general or if you have a kitty that’s having the problem at hand. But if you have used them to try to treat for hairballs and it has caused diarrhea, then discontinue use. It would probably be ideal to consult a vet if any of these are true: + The kitty is coughing but you have not seen improvement with hairball treatments + The kitty has diarrhea that doesn’t clear up in 24 hours + The kitty has any other symptoms, like nasal discharge, eye discharge, sneezing, raspy breathing or bad breath. Respiratory infections are very common this time of year. One of my Siamese always sounds like she has a hairball when she actually has chronic bronchitis. She had us all stumped for months, but now that we know what to look for, treating it is as