IMHO, I would not use it for a cat. It seems to contain quite a lot of phosphorus and lactose.
"Product Contains:
Passiflora 1X | Triple Strength HPUS
For restless sleep from exhaustion
Avena Sativa 1X | Double Strength HPUS
For stress, nervousness
Humulus Lupulus 1X | Double Strength HPUS
For sleeplessness
Chamomilla 2X | HPUS
For nervous irritability
And the following biochemic phosphates for enhancing cellular function: Calcarea Phosphorica 3X HPUS, Ferrum Phosphoricum 3X HPUS, Kali Phosphoricum 3X HPUS, Natrum Phosphoricum 3X HPUS, Magnesia Phosphoricum 3x HPUS
Other Ingredients
This product contains lactose.
"