Amitriptyline, pheromones and supplements in idiopathic cystitis
7-year-old neutered cat with recurrent idiopathic cystitis. The owner has read online about several drugs and supplements and asks which one is suitable.
Which statement is correct?
chevron_right Show answer and explanation
A. Glycosaminoglycan supplements clearly reduce recurrences compared with placebo
Controlled trials have not shown a clear difference versus placebo, although they are used because they are safe. They should not replace environmental and dietary measures.
B. Amitriptyline started during the acute episode shortens it
It has shown no benefit in acute episodes. It also takes weeks to work and causes sedation and urinary retention.
C. Evidence for drugs and supplements is limited: the basis is MEMO with wet food, and amitriptyline is reserved for severe chronic cases that do not respond
Correct. Synthetic facial pheromones may help as part of MEMO, but studies are inconclusive. Amitriptyline has adverse effects (sedation, weight gain, urinary retention) and is considered only in refractory cases.
D. Synthetic facial pheromones alone are enough and make environmental changes unnecessary
Pheromones are at most an add-on. Evidence of efficacy is weak and they do not replace better resources and less conflict.
lightbulb Key takeaway
Before adding drugs for a cat with recurrent idiopathic cystitis, check that MEMO and wet food are really in place. Amitriptyline is a last-step option for severe chronic cases, never a treatment for the acute episode.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.