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Stomorgyl Tablets for Dogs & Cats

  • 2 » Priced per Tablet £0.39
  • 10 » Priced per Tablet £0.79
  • 20 » Priced per Tablet £1.30

Selection of 3 products from

£0.39 to £1.30

Stomorgyl Tablets contain two antibiotics, metronidazole and spiramycin. These act together to combat the types of bacteria often found within the mouth. Stomorgyl is used for infections around the teeth sockets (periodontitis) and related problems in cats and dogs. The coated tablets should be given whole, once daily for 5 to 10 days.


Pink circular film-coated tablets. Each tablet contains spiramycin and metronidazole in an inert carrier.

Three strengths are available:

STOMORGYL 2: Each tablet contains 46.9 mg spiramycin of standard potency (3,200 IU/mg), and 25 mg metronidazole.

STOMORGYL 10: Each tablet contains 234.4 mg spiramycin of standard potency (3,200 IU/mg), and 125 mg metronidazole.

STOMORGYL 20: Each tablet contains 469 mg spiramycin of standard potency (3,200 IU/mg), and 250 mg metronidazole.


For the treatment of periodontal and related oral conditions in dogs and cats.

Metronidazole has antimicrobial activity against most anaerobes, including Bacteroides, Fusobacterium and spirochaetes. Spiramycin has a therapeutic spectrum including Gram-positive aerobes such as staphylococci, streptococci and Bacillus, but also including anaerobes such as Actinomyces, Clostridium and Bacteroides. Antimicrobial synergy has been shown in vitro for many of these organisms.

Dosage and administration

By oral administration. For dogs and cats, 23.4 mg spiramycin and 12.5 mg metronidazole/kg bodyweight, once daily for 5 to 10 days.


1 tablet/2 kg bodyweight once daily for 5–10 days.

STOMORGYL 2 is the most suitable for use in cats.


1 tablet/10 kg bodyweight once daily for 5–10 days.


1 tablet/20 kg bodyweight once daily for 5–10 days.

Contra-indications, warnings, etc

Do not use in animals with a known hypersensitivity to spiramycin or metronidazole.

Do not break or crush the tablets.

For animal treatment only.

In case of accidental ingestion obtain medical advice if needed. Wash hands after use. Should direct skin contact occur, wash affected area. Should accidental eye exposure occur, flush the eyes immediately with water and seek medical attention if needed.

Pharmaceutical precautions

Do not store above 25°C. Store in a dry place. Protect from light.

Any unused product or waste material should be disposed of in accordance with national requirements.

Keep out of the reach and sight of children.

Legal category


Packaging Quantities

Packs of 5 blister strips each containing 10 tablets.

Further information

STOMORGYL should not be used concurrently with other antibiotics of the macrolide group.

Safety in pregnant dogs and cats has not been demonstrated.

Marketing authorisation numbers


Vm 08327/4083


Vm 08327/4084


Vm 08327/4085

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Reviews of Stomorgyl Tablets for Dogs & Cats

Read our customers' reviews of Stomorgyl Tablets for Dogs & Cats

Questions & Answers for Stomorgyl Tablets for Dogs & Cats

Below are some recent questions we've received regarding Stomorgyl Tablets for Dogs & Cats, including answers from our team.

Ask Your Own Question

Can the tablet make my cat sick?

15th Dec 2015

My cat feels bad and with temperature and her breathing is quite fast and that all happened after i gave the antibiotic. Btw i broke it in to two pieces would that cause he feel unwell?

  • Non-Executive Director

These tablets are coated and it is advised that they are swallowed whole, not broken. I am uncertain why this is the case because both of the antibiotic ingredients are safe to use in cats. If she seems unwell in any way it is best to contact your own vet for advice. A check up might be needed.

Stomorgyl 10 uses

21st Nov 2015

Hi, I've just been given this tablet to treat my puppies diarrhea, but after googling them it says it's used to treat oral infections?? Have I been given the wrong antibiotic?

  • Non-Executive Director

I think your vet will have intended to use this antibiotic. The license granted for a medicine has to be very specific and is often very limited. However many vets (and doctors) will prescribe antibiotics for purposes other than the licensed use, if in their opinion/experience it is the best one for the job. Metronidazole is one of the ingredients in your tablets and this is used very widely for diarrhoea in dogs, sometimes by itself, sometimes in combination. Obviously you should check with your vet if you are unsure, but I think it will be intended.

With or without food / Con o senza cibo

8th Jul 2015

la compressa stomorgyl20 si somministra a stomaco pieno?o è indifferente?

  • Non-Executive Director

Le compresse possono essere dati con o senza cibo . Non è importante.

The tablet can be given with or without food. It is not important.

Administring tablet

16th May 2015

Have read that Stomorgyl 10 should not be crushed or broken. The cat will not allow anything near his painful mouth. He will tear me to shreads. How do I administer it? Weight 3kg.
Stressed and concerned.

  • Non-Executive Director

This is a difficult situation and there is not going to be a perfect answer. I would say that the unpleasantness for both parties which can result from attempting to forcibly dose a cat like this with a whole tablet is probably not worth it. With a very good technique and a good pill giving device, it might be possible, but it might well not be. Therefore the options are to give Stomorgyl mixed in food, or swap to a different antibiotic. There is a real risk to cats of developing a swallowing problem in future, due to damage to the oesophagus caused by delayed swallowing of the antibiotic doxycycline (found in Stomorgyl). This can even happen with a whole tablet in fact, if it sits in the oesophagus for a while. For this reason it is best advised that a little food is given after the tablet anyway. If Stomorgyl is given broken, then it has to be well mixed with food, then a little un-medicated food or drink given straight after to wash things clear. There has to be a slight risk if this is done, though it is not great. I would suggest you talk to your vet about this and decide if you can get the Stomorgyl down reasonably safely, or switch to a different antibiotic. (Clindamycin can be effective and is available as a capsule which can be opened and the contents more safely mixed with food.)

Stomorgyl 10

15th Apr 2015

just wondering if there are any e numbers in tablet or coating as my dog is so hyper and only thing I can think is tablets as nothing else in diet changed

  • Non-Executive Director

It is possible that your dog is reacting to any of the constituents of the tablet (active or inactive ingredients). If the reason to give the tablets is greater than the problems possibly caused by them, then you might need to complete the course and wait until you stop the tablets to see if your dog calms down. Alternatively do check with your vet as an alternative treatment could be tried.