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Pexion 400mg is for the treatment of primary epilepsy in dogs. It is a white, oblong tablet supplied in 100mg and 400mg tablets, either individually or in packs of 100. Pexion is used for the reduction of the frequency of generalised seizures, due to idiopathic epilepsy in dogs. This medication is to be used after careful evaluation of alternative treatment options.
Pexion is a prescription item and will be sent once a valid prescription is received. Please follow the instructions given by your vet.
How does Pexion work? Pexion acts on a specific receptor in the brain cells to help reduce the amount of excessive electrical activity. Therefore, like other epilepsy medications, it reduces the amount of seizures your dog has. The medication is intended to be administered twice daily (12 hours apart) and the dose depends on the weight of your dog:
5kg - 1/2 x 100mg tablet
5kg to 10kg - 1 x 100mg tablet
10kg to 15kg - 1 & 1/2 x 100mg tablet
15kg to 20kg - 1/2 x 400mg tablet
20kg to 40kg - 1 x 400mg tablet
40kg to 60kg - 1 & 1/2 x 400mg tablet
Over 60kg - 2 x 400mg tablet
How long does Pexion take to work? Pexion starts to work within a few hours. It will take a little while before any improvements are noticed in regards to the dog's seizure patterns. This may be because your dog only experiences seizures every few weeks or it can take a short time for your Vet to find the correct dose for your dog.
Do not use Pexion in dogs with severely impaired hepatic functions, severe renal or cardiovascular disorders. Once the packet is open, the product's shelf life is 8 months.
If you see the "prescription required" sign next to an item you’d like to order, it means the item can only be issued with a prescription. While you can add these items to your shopping cart and pay for them along with other non-prescription products, we can’t dispatch them until we’ve received a prescription.
For orders over £29 postage is free. For orders under £29 we charge £2.99.
For Light items (under 2kg) our standard method is Royal Mail Second Class (there are a few exceptions, so if in doubt check our Delivery page).
To get it faster you can upgrade Light items to Royal Mail 1st Class or a Guaranteed Next Day Courier service, Saturday Courier or even before 12 noon services. There's a small fee, but if you're in a hurry they are worth considering. To qualify for next working day delivery, orders must be placed before 12 Noon Monday to Thursday. There is no standard Saturday courier delivery.
Heavy items weighing 2kg and more are sent via courier. If ordered before noon Monday to Thursday, Heavy items will be delivered next working day. Heavy items ordered after 12 Noon Friday, or anytime Saturday and Sunday will dispatched on Monday for a Tuesday delivery.
Please note that if you are purchasing a mix of Light and Heavy items at the same time, these will be sent separately. The Heavy items being sent by Courier, the Light items by Royal Mail Second Class.
Refrigerated items are only despatched by courier Monday to Thursday to ensure the item remains cool.
All exceptions to these guidelines are noted in the product description.
For more information, view our Delivery page.
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Vet prescription required in checkout
- Get a prescription from your vet
- Place your order with Pet Drugs Online
- Add a prescription and tell us about your pet.
- Our vets will double check your order & your order is dispatched right away