Zitac Tablets for Dogs

Zitac Tablets for Dogs
100mg » Priced per Tablet

  • 100mg » Priced per Tablet £0.40
  • 200mg » Priced per Tablet £0.59

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£0.40 to £0.59


Zitac tablets are given to dogs to treat vomiting caused by persistent inflammation of the stomach wall (chronic gastritis). Zitac contains cimetidine which acts to reduce acid secretion in the stomach. A dose has to be given 3 times daily for at least 2 weeks to be fully effective. Once the vomiting has stopped, at least a further 2 weeks of treatment is recommended to prevent recurrence. Side effects are unlikely to occur with Zitac, even if overdosed.


Zitac Vet 100 mg tablets are oblong tablets, scored on both sides, containing cimetidine 100 mg per tablet.

Zitac Vet 200 mg tablets are oblong tablets, scored on both sides, containing cimetidine 200 mg per tablet.


Symptomatic treatment for the reduction of vomiting associated with chronic gastritis in dogs.

Dosage and administration

Dose and route of administration: 5 mg of cimetidine per kg of bodyweight administered three times daily by the oral route. Tablets may be split to facilitate dosing.The concomitant use of appropriate dietary measures is strongly recommended. In clinical trials the efficacy of cimetidine has only been studied concomitantly with a hypoallergenic diet.

Number of Zitac vet 100 mg tablets to be administered three times daily according to body weight.

Weight (kg)

Number of Zitac vet 100 mg tablets

6 to 10


11 to 20


Number of Zitac vet 200 mg tablets to be administered three times daily according to body weight.

Weight (kg)

Number of Zitac vet 200 mg tablets

11 to 20


21 to 40


41 to 60

Recommended treatment scheme: reduction of vomiting is achieved in about 2 weeks. Animals should however be treated for at least 2 weeks after the remission of clinical signs, so a minimum treatment duration of 28 days is recommended. If considered successful, medication should be withdrawn for 2 weeks. If vomiting occurs again, treatment can be re-initiated, without risk for intolerance. Depending on the response, treatment can be adapted to the individual animal until the response is considered to be adequate and continued. Dietary measures should always be maintained.

Contra-indications, warnings, etc

Treatment with cimetidine is symptomatic only and does not result in resolution of histopathological changes associated with gastritis. It is recommended that dogs showing persistent vomiting should undergo appropriate investigations to diagnose the underlying cause before starting treatment. This is especially important in older animals. The reduction of gastric acidity caused by cimetidine may contribute to bacterial overgrowth and antigenic stimulation. If the response to treatment is poor within 15 days, the diagnosis and treatment plan should be re-evaluated. In case of renal dysfunction, adjustment of the dose may be required as the clearance of cimetidine may be decreased. Transient and self-resolving slight swelling of mammary glands may be observed in female dogs (gynaecomastia; anti-androgenic activity). A reduction of prostate weight was also observed in male rats and dogs, with no impact on reproductive performances; this effect was reversible. No other undesirable effects were reported. If you notice any serious effects or other effects not mentioned in this leaflet, please inform your veterinary surgeon. The use of the product during pregnancy and lactation in the target species has not been investigated. Therefore, use of the veterinary medicinal product during pregnancy and lactation should be based on a risk benefit-assessment by the responsible veterinary surgeon. Due to inhibition of cytochrome P-450 activity by cimetidine, the metabolism and elimination of some drugs can be reduced. Clinically relevant interactions may occur with compounds having a narrow therapeutic index, e.g. beta-blockers, calcium channel blockers, benzodiazepines, barbiturates, phenytoin, theophylline, aminophylline, warfarin and lidocaine. Doses of such drugs may need to be reduced when administered concomitantly with cimetidine. The increased gastric pH resulting from cimetidine administration may lead to reduced absorption of drugs requiring an acid medium for absorption. It is recommended that at least 2 hours should elapse between administration of cimetidine and aluminium or magnesium hydroxide, metoclopramide, digoxin or ketoconazole when possible.


Acute exposure to cimetidine yielded LD50 values above 2600 mg/kg, i.e. over 170 times the recommended daily dosage in dogs. A target animal safety study in dogs demonstrated that the product administered orally at 75 mg cimetidine/kg/day (five times the recommended daily dose) for a period of 91 days was well tolerated by dogs. No signs of overdose are known.

Withdrawal period

Not applicable.

For animal treatment only. Keep out of reach and sight of children.

Pharmaceutical precautions

Store the blisters in the original package to protect from light. Remaining tablet halves should be stored in the original blister pocket in order to protect from light. Do not use after expiry date which is stated on the carton.

Dispose of any unused product and empty containers in accordance with guidance from your local waste regulation authority.

Legal category


Packaging Quantities

The tablets are packed in push-through blisters (white opaque PVC/Aluminium foil) in a printed outer carton.

Authorised pack sizes: Carton box containing 30 tablets (3 blister with 10 tablets per blister). Carton box containing 100 tablets (10 blister with 10 tablets per blister). Not all pack sizes may be marketed.

Further information


Marketing Authorisation Holder (if different from distributor)

Intervet International BV, NL.

Represented by Intervet UK Ltd.

Marketing authorisation number

Vm 06376/4056: Zitac Vet 100 mg tablets for dogs.

Vm 06376/4057: Zitac Vet 200 mg tablets for dogs.

Need help or advice? Contact us:

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products, such as Insulin, are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. The majority of light weight orders (less than 1.5kg) can be delivered for a flat rate of £10. For an accurate estimate of the delivery charge, please put the items you require in your basket and use the "Estimate Delivery" system on the shopping basket page (you only need to enter your country and postal/zip code) for a quick quote. For deliveries to the USA you may need to go to the checkout page and enter your full address to get a quote (as some services need your state in order to quote too). For more information on international deliveries, please see our delivery information page.

Delivery of aerosols

Due to air freight restrictions aerosols cannot ever be sent abroad by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as insulin and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.

Reviews (6)

Q & A

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

23 September 2017 6:08am



What interval does there need to be between tablets, and do they need to be equally spaced round the clock day and night or can it be purely before meals

  • Veterinary Advisor

Zitac should be given 3 times a day, as evenly spaced as possible but you do not need to get up during the night to do it. Assuming that your dogs meals are evenly spaced through the day it is fine to give the tablets just before meals.

21 July 2015 2:59pm

Side affects


can 200mg per day of zitac tablets have any side affects for my dog.

  • Non-Executive Director

Potentially any drug can have side effects, but in fact this drug is remarkably safe and there are virtually no reports of side effects in dogs with this drug. It can sometimes interact with other drugs being given, but usually this just reduces the effect of the Zitac itself and not cause any direct harm. Nothing is perfectly safe, but this drug used in the normal way at an appropriate dose is extremely safe in dogs. (Usual dose is up to 10mg per kg bodyweight given 3 times daily.)

11 January 2014 3:14pm

Can I give my dog zitac on a empty stomach as he won't eat


Can I give zitac on an empty stomach

  • Non-Executive Director

Generally it is best to give Zitac on an empty stomach, before feeding. It acts to reduce stomach acidity, which is stimulated by eating food. Therefore if given before the food it has a chance to start working and is probably more helpful this way, though it can be given at any time.