Metrobactin Tablets

Metrobactin Tablets

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Item Number: METROBAC 
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250mg (Pack of 250) £85.19 Usually despatched within 24-48 hours
500mg (Pack of 250) £161.79 Usually despatched within 24-48 hours


NB This is a prescription only medicine
How do I buy Prescription medicines from you?

  1. Obtain a Prescription from your vet
  2. Place your order online or by phone
  3. Either fax email* or post your prescription to us.
  4. “Controlled Drugs” can only be dispensed ofter receipt of an original valid prescription sent by post. Controlled Drugs must be sent via tracked, signature delivery and do not qualify for free delivery.
  5. **Unless your vet has stated that the original must be sent to us.
  6. Hyperdrug Pharmaceuticals Ltd, Middleton In Teesdale, Barnard Castle, County Durham, DL12 0NG.

You are ordering items which require a prescription, Tampering with a prescription or attempting to obtain extra unauthorise supplies is a criminal offence and will have to be reported to the authorities. “Controlled Drugs” can be only be dispensed ofter receipt of an original valid prescription sent by post. Controlled Drugs are sent via tracked, signature delivery.

  1. Place your order online or by phone
  2. Obtain a Prescription from your vet
  3. Either post the original, fax it to 01833 641032, or email it to us at [email protected]

 I have a prescription on file
 I am sending you a prescription by email
 I am sending you a prescription by fax
 I am sending you a prescription by post


Metrobactin Tablets (Pack of 250).

Target species

Dogs and cats.

Indications for use, specifying the target species

Treatment of gastrointestinal tract infections caused by Giardia spp. and Clostridia spp. (i.e. C. perfringens or C. difficile).
Treatment of infections of the urogenital tract, oral cavity, throat and skin caused by obligate anaerobic bacteria (e.g. Clostridia spp.) susceptible to metronidazole.


Do not use in case of hepatic disorders.
Do not use in case of hypersensitivity to the active substance or to any of the excipients.

Special warnings


Special precautions for use

Special precautions for use in animals
Due to the likely variability (time, geographical) in the occurrence of metronidazole resistant bacteria, bacteriological sampling and susceptibility testing are recommended.
Whenever possible, the product should only be used based on susceptibility testing.
Official, national and regional antimicrobial policies should be taken into account when the veterinary medicinal product is used.
In very rare cases, neurological signs may occur especially after prolonged treatment with metronidazole.

Special precautions to be taken by the person administering the veterinary medicinal product to animals
Metronidazole has confirmed mutagenic and genotoxic properties in laboratory animals as well as in humans. Metronidazole is a confirmed carcinogen in laboratory animals and has possible carcinogenic effects in humans. However, there is inadequate evidence in humans for the carcinogenicity of metronidazole. Impervious gloves should be worn during administration of the product to avoid skin contact with the product.
To avoid accidental ingestion, particularly by a child, unused part-tablets should be returned to the open blister space and inserted back into the carton.
In case of accidental ingestion, seek medical advice immediately and show the package leaflet or the label to the physician.Wash hands thoroughly after handling the tablets.

Adverse reactions (frequency and seriousness)

The following adverse reactions may occur after administration of metronidazole: vomiting, hepatotoxicity, neutropenia and neurologic signs.

Use during pregnancy and lactation

Studies in laboratory animals have shown inconsistent results with regard to teratogenic/embryotoxic effects of metronidazole. Therefore, use of this product during pregnancy is not recommended.Metronidazole is excreted in milk and use during lactation is therefore not recommended.

Interaction with other medicinal products and other forms of interaction

Metronidazole may have an inhibitory effect on the degradation of other drugs in the liver, such as phenytoin, cyclosporine and warfarin.
Cimetidine may decrease the hepatic metabolism of metronidazole resulting in increased serum concentration of metronidazole.
Phenobarbital may increase hepatic metabolism of metronidazole resulting in decreased serum concentration of metronidazole.

Amounts to be administered and administration route

For oral administration.
The recommended dose is 50 mg metronidazole per kg bodyweight per day, for 5 7 days.  The daily dose may be divided equally for twice daily administration (i.e. 25 mg/kg bodyweight twice daily).

To ensure administration of the correct dosage bodyweight should be determined as accurately as possible. The following table is intended as a guide to dispensing the product at the recommended dose rate of 50 mg per kg bodyweight per day.

To ensure administration of the correct dosage bodyweight should be determined as accurately as possible. The following table is intended as a guide to dispensing the product at the recommended dose rate of 50 mg per kg bodyweight per day.



Metrobactin 250 mg

for dogs and cats


Metrobactin 500 mg

for dogs and cats

1 kg – 1.25 kg


>1.25 kg – 2.5 kg


>2.5 kg – 3.75 kg


>3.75 kg  – 5 kg


>5 kg – 7.5 kg


>7.5 kg – 10 kg


>10 kg – 15 kg



>15 kg – 20 kg


>20 kg – 25 kg


>25 kg – 30 kg


>30 kg – 35 kg


>35 kg – 40 kg


= ¼ Tablet           = ½ Tablet           = ¾ Tablet           = 1 Tablet







Tablets can be divided into 2 or 4 equal parts  to ensure accurate dosing. Place the tablet on a flat surface, with its scored side facing up and the convex (rounded) side facing the surface.
Halves: press down with your thumbs on both sides of the tablet.
Quarters: press down with your thumb in the middle of the tablet.

Overdose (symptoms, emergency procedures, antidotes)

Adverse events are more likely to occur at doses and treatment durations in excess of the recommended treatment regimen. If neurological signs occur, treatment should be discontinued and the patient should be treated symptomatically.

Withdrawal period(s)

Not applicable


Pharmacotherapeutic group: (nitro) imidazole derivatives
ATC code: QP51AA01, QJ01X D01

Pharmacodynamic properties

After metronidazole has penetrated the bacteria the molecule is reduced by the sensitive bacteria (anaerobe). The metabolites that are created have a toxic effect on the bacteria through binding to the bacterial DNA. In general metronidazole is bactericidal for sensitive bacteria in concentrations equal to or a little higher than the minimum inhibiting concentration (MIC).
Clinically metronidazole does not have any relevant effect on facultative anaerobe, obligate aerobe and microaerophilic bacteria.

Pharmacokinetic particulars

Metronidazole is immediately and well absorbed after oral administration. After 1 hour a plasma concentration of 10 micrograms/ml was reached with a single dose of 50 mg. The bioavailability of metronidazole is almost 100% and the half life in the plasma is approximately 8-10 hours. Metronidazole penetrates well into the tissues and bodily fluids, such as saliva, milk, vaginal secretions and semen. Metronidazole is primarily metabolised in the liver. Within 24 hours after oral administration 35-65% of the administered dose (metronidazole and the metabolites thereof) is excreted in the urine.


List of excipients

Cellulose, microcrystalline
Sodium starch glycolate, type A
Yeast (dried)
Chicken Flavour
Magnesium stearate


Not applicable

Shelf life

Shelf life of the veterinary medicinal product as packaged for sale: 3 years
Shelf life of divided tablets: 3 days.

Special precautions for storage

This veterinary medicinal product does not require any special storage conditions.

Nature and composition of immediate packaging

Aluminium - PVC/PE/PVDC blister
Cardboard box of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 25 or 50 blisters of 10 tablets
Cardboard box containing 10 boxes, each containing 1 or 10 blisters of 10 tablets

Not all pack sizes may be marketed.

Special precautions for the disposal of unused veterinary medicinal product or waste materials derived from the use of such products

Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal products should be disposed of in accordance with local requirements.


Free shipping from Hyperdrug

Value Weight Delivery Charge*  
Over £49.00 Any Weight FREE*
Under £49.00 Under 250g £2.99
Under £49.00 No weight limit £4.99

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