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Felimazole Tablets 2.5mg
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  • 1Get a prescription from your vet
  • 2Place your order with Pet Drugs Online
  • 3Attach a prescription and tell us about your pet, read more
  • 4Our vets will double check your order
  • 5Your order is dispatched right away
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Felimazole Tablets 2.5mg

This item requires a vet's prescription

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  • Vet price £0.55
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Prescription Info.
Service Reviews

Felimazole Tablets 2.5mg

What is Felimazole? Felimazole is for the treatment of hyperthyroidism in cats. It is supplied in 1.25mg, 2.5mg tablets and 5mg tablets and can be sold as individual tablets or packs of 100. Each strength tablet has a different colour sugar coating. The 1.25mg tablets are red, the 2.5mg tablets are pink and the 5mg tablets are orange.

The active ingredient in Felimazole is thiamazole. This can cause haemoconcentration and therefore it is important to make sure your cat has access to plenty of drinking water.

What is hyperthyroidism? Hyperthyoidism (also known as overactive thyroid) is a condition that occurs when the thyroid gland begins to produce an excess amount of the thyroid hormone. Cats with hyperthyroidism tend to burn energy too rapidly and this can result in weight loss, despite the increase in appetite. This condition is very common in older cats.

Fortunately, the majority of cats that develop hyperthyroidism can be treated successfully and make a complete recovery.

The most common signs of hyperthyroidism are:

. Weight loss

. Increased appetite

. Increased thirst

. Increased heart rate.

The recommended starting dose for the long term treatment of hyperthyroidism is 5mg per day. The dose can then be split and a 2.5mg tablet can be given twice daily but your Vet will advise on what dosage is most appropriate for your cat.

Do not use in pregnant or lactating cats.

Do not use in cats with a hypersensitivity to thiamazole.

Do not break, split or crush tablets.

Do not handle without gloves if pregnant. Pregnant women should also not handle cat litter unless wearing gloves.

This is a prescription item and will be sent once a valid prescription is received.

To check the most up to date information about this product, please read its Summary of Product Characteristics (SPC) on the Veterinary Medical Directorate’s (VMD) Product Information Database:

View summary of product characteristics (SPC)

We offer a range of delivery options:

Our standard delivery is free by Royal Mail 2nd Class - there are some exceptions and you can see these on our Delivery page. These include refridgerated items and aerosols which have to be sent via our Next Day Courier service.

We also offer delivery by Royal Mail 1st Class or a Guaranteed Next Day Courier service for a small fee (for items in stock ordered before 12pm Monday to Friday - excludes Saturday delivery).

Orders under £20 have a £2.50 handling fee automatically added.

Food deliveries weighing 2kg and over ordered before 12pm will be delivered next working day - Monday to Friday - excludes Saturday delivery. Orders weighing over 6kg are sent free.

For more information, view our Delivery and Returns page.

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.

Product reviews for prescription products are not allowed by the RCVS. But here is what our customers say about our service:

Service reviews have been compiled from 18283 customer reviews


Efficient service


Excellent products at realistic prices, delivery excellent too


Efficient , good prices, good chioce of products , prompt delivery.


Very good service, can't find fault, any problems are quickly dealt with.
Wouldn't change to any body else.
Keep up the good work.


Fast and well priced


Very good. Very fast delivery.


Very user friendly website and when I called I spoke to a very helpful member of staff. The delivery was prompt and arrived in good condition. Have used them before and will use them again.


Items arrived on time, packed well. Having to sort out a prescription was easy after contacting a team member. Will use again and will recommend Pet Drugs Online to family and friends


Pet drugs are very good they are very quick to get your order to you and most important they are very cheap .l have recommended them to all my friends who have pets . All l can say is l will continue to be a customer as very satisfied . Well done pet drugs online.


Speedy service. Will use again.


Quick delivery excellent product


I would thoroughly recommend Pet Drugs Online. The products I bought for my cat and dog were cheaper than at the vets and they arrived very quickly. I have bought from them before and will certainly do so again.


I ordered eye ointment for my dog. It was an easy process, I sent a vets prescription and they promptly sent the goods to me. It was much cheaper than getting it from my vet and it was exactly the same product. I would definately buy from them again.


Good price, fast delivery. Happy to buy from again.


I would highly recommend this company, excellent service. Received my order in 2days.


Promised delivery next day which was a Friday. We waited in all day but delivery didn't arrive. I phoned customer services early Saturday to ask when it would be delivered and she promised she would phone me back but she didn't. We were going on holiday on the Monday and were concerned
food would not arrive before we left, but it did just. We found this all very disappointing and stressful.

On 23 Jul 2016 Pet Drugs Online responded:
Hi Ann,

I am so sorry to read this. I am going to look into this so I can find out what has happened here. 

I will get back to you on Monday. 

Kind Regards


Brilliant service will definitely use drugs online again


I was very impressed with the service I received. I placed my order online on a Friday afternoon & it was delivered the following morning


Reliable and fast


Great service, great price, great delivery - thank you 😀


everything as expected


Very good service.


Excellent service prompt deliveries a thoroughly superb service in all respects including costs of medicines i have recommend all my pet owner friends to give PDO a try


quick, efficient, trustworthy


Very quick delivery, item as described at a super price!

View all 18283 reviews