The best ever FELIWAY®, for enhanced serenity!

FELIWAY® Optimum Refill

30-days 90-days 180-days
30-days 90-days 180-days
30-days 90-days 180-days
30-days 90-days 180-days
30-days 90-days 180-days
30-days 90-days 180-days

FELIWAY® Optimum Refill

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Replace your FELIWAY® Optimum Refill every 30 days to continue to create a loving and comfortable home for your cat.

FELIWAY® Optimum is the best FELIWAY answer to reduce signs of stress such as:
  • Scratching
  • Urine spraying
  • Tension & conflict between cats
  • Hiding
  • Reactions to changes


FELIWAY® Optimum Refill requires a FELIWAY® Diffuser (diffuser not included) and should be plugged in continuously.  Screw the vial into the diffuser head and plug it into an outlet with the vents up.


Please note: an additional discount code cannot be applied to a subscription

  • Refill Vial(s) Only - No Diffuser Head

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How long does FELIWAY® Optimum take to work?

When using FELIWAY® Optimum, many cat parents start to see results for
their cat within the first seven days of use. However, all cats are different.
The first signs of enhanced serenity may come later depending on the duration
and severity of your cat’s signs of stress. We recommend using FELIWAY® Optimum for a period of at least one month, and ideally use it continuously for the maximum benefit.

For more information on how long all our FELIWAY® diffusers take to work, view our full guide here.

How long should I use FELIWAY® Optimum for?

Most cats benefit from the continued use of FELIWAY® Optimum to create a pleasant environment in the home, with the minimum recommended duration being one month of use. This ensures that FELIWAY® Optimum has time to take full, though you could start to see enhanced serenity in your cat much sooner.

When should I use FELIWAY® Optimum?

For the best results, it’s recommended that FELIWAY® Optimum is used
constantly or for a minimum of at least one month. Simply leave the diffuser
plugged into an electric socket 24/7 to provide ongoing support and enhanced
serenity for your cat.

You should consider using FELIWAY® Optimum in the following situations:

  • If your cat is urine spraying
  • If your cat is scratching walls or furniture
  • If your cat shows signs of stress such as hiding, reduced activity or appetite, or overgrooming
  • If you are anticipating changes to your home (e.g. moving house, renovations, redecorating your home, or arrival of a new pet or person into the household)
  • If you have two or more cats living with you and they show signs of tension (e.g. chasing, blocking, or staring) or if they are fighting?

Where should I use FELIWAY® Optimum?

For the best results, you should use FELIWAY® Optimum in the room where
your cat spends most of their time. Plug the diffuser into a properly functioning electrical socket that has clear space above it of at least 4ft (1.2m). This allows the oily vapor that carries the calming messages to rise above the diffuser in a column of warm air and into the surrounding environment.

Where should FELIWAY® Optimum NOT be used?

To ensure your FELIWAY® Optimum diffuser can work as effectively as
possible, you should avoid using it in:

  • Hallways - Cats naturally spend very little of their time in hallways, so FELIWAY® Optimum will have a reduced effect if used here.
  • Near the litter box – Likewise, cats spend very little time near their litter tray, so the efficacy would be reduced if used here. If the litter box is in the room where your cat spends the most time, there is no problem plugging it in this room.

Available at vets and on:

How to use FELIWAY® Optimum ?

Easy to use

  • Each diffuser will provide calming pheromones continually for up to 30 days in a 700 square foot area.
  • For the best results, plug in your FELIWAY Optimum diffuser in the room where you cat spends the most time, or where conflict among your cats happen most frequently.

Good to know

  • Try not to plug the diffuser under items (e.g. shelves) or close to objects (e.g. behind curtain or doors) as this affects efficacy..
  • For the best results, replace your refill every 30 days

What Customers Are Saying...

FELIWAY® Optimum helps with more signs of stress, in more situations, and calms cats better than ever! Customers have reported a satisfaction rating of 9.1 out of 10, and 93% have reported enhanced calming* for their cats!

*Field efficacy study: Ceva Sant Animale Internal report ST-CLT/D921/1909 (2020)

Testimonials for FELIWAY® Optimum Refill

Gomette 3 years old

Gomette 3 years old

This is Gomette. She is 3 years old. She is very playful and cuddly. This first time I saw Gomette, I wanted to take care of her. I...
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FELIWAY® Optimum Refill
How FELIWAY helped Mewsli to relax and stop scratching

How FELIWAY helped Mewsli to relax and stop scratching

Mewsli is my little baby. And thanks to FELIWAY we have bonded. Mewsli was a rescue cat. When we first got him, he was tiny and scared....
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FELIWAY® Optimum Refill