Skip to main content


Here you can find answers to the most frequently asked questions about Cystophan. If your question is not answered please don't hesitate to contact us and one of our Technical Advisors will be more than happy to help.

Please fill in our contact form, email us on or call us on +44 (0) 1460 243 230.

When should I use Cystophan?

Cystophan is designed to support feline urinary health.  Cats with feline idiopathic cystitis (FIC) are known to have deficiencies in the protective glycosaminoglycan (GAG) layer that lines the inside of the bladder. FIC may also lead to Feline Lower Urinary Tract Disease (FLUTD). They also process stress in a different way to other cats.

What is in Cystophan?

Cystophan contains N-acetyl D-glucosamine, hyaluronic acid, L-tryptophan and an artificial chicken flavouring.  See the Cystophan product page for further information.

What is N-acetyl D-glucosamine?

N-acetyl D-glucosamine is a precursor for the GAG layer that lines the inside of the bladder.  Supplementing N-acetyl D-glucosamine aims to replenish the defective GAG layer.

What is hyaluronic acid?

Hyaluronic acid forms the framework of the GAG layer and it provides a structure for the N-acetyl D-glucosamine building blocks to attach to.

What is L-tryptophan?

L-tryptophan is an amino acid, usually found in the diet, that can be converted into serotonin.  Serotonin is an inhibitory neurotransmitter that can reduce stress and anxiety in cats.  Cats with FIC are known to process stress differently and potential stressful experiences can act as a trigger for bouts of cystitis.

Are there any medications that cannot be given alongside Cystophan?

There are several drugs available that can also increase serotonin levels and these include fluoxetine (Prozac), clomipramine (Clomicalm), selegiline (Selgian) and amitriptyline.  Care should be taken when using Cystophan alongside these drugs.  If in doubt please contact your veterinary surgeon.

How should I administer Cystophan?

The capsules can be given whole but, to reduce the potential for causing stress, it may be better to open the capsule(s) and sprinkle the contents onto the food.

The oil content of most dry pet food normally allows the powder to coat the biscuits/kibble, but if not then a small amount of water can be added to encourage the powder to stick.