Veterinary medicine wholesale dealer's authorisation (WDA)

How to legally run a business that deals with the wholesale of animal medicines (veterinary medicinal products) and the WDA Register.

For changes to this guidance as a consequence of the coronavirus (COVID-19) pandemic please refer to the VMD news and guidance on coronavirus (COVID-19) collection page

The Veterinary Medicines Directorate (VMD) is responsible for inspecting and authorising veterinary wholesale dealers.

You can only wholesale an animal medicine if you have one of the following:

  • a marketing authorisation

  • a manufacturer’s authorisation

  • a wholesale dealer’s authorisation (WDA)

You also need a WDA if you’re a ‘virtual wholesaler’, ie you buy and sell an animal medicine but contract out the handling of the medicine to another authorised wholesale dealer.

When you need a WDA

You must obtain a WDA to sell or supply medicines to anyone other than the end user.

You don’t need a wholesale dealer licence if you’re a broker. A broker is someone who has arranged for a retailer to buy animal medicines directly from a wholesale dealer at a reduced rate.

Apply for a WDA

Complete the application form for WDA (ODT, 69.5KB) and send to the VMD.  

If you need to apply for a variation to your WDA, submit the variation application form for WDA (ODT, 70.1KB)

Inspections Administration Team
Woodham Lane
KT15 3LS


Your site will be inspected before the VMD grant your application. This inspection should take place within 90 days of your application being validated.

You can’t start wholesale dealing before you get confirmation in writing that your authorisation has been granted.


You need to pay a fee for the application for your WDA and for your initial site inspection.

You’ll also have ongoing annual and inspection fees.

The application and annual fees are not refundable or transferable.

You should qualify for a fee reduction if your annual turnover is less than £35,000 or you only deal in any of the following:

  • medicines classified as Authorised Veterinary Medicines-General Sales List (AVM-GSL)

  • products covered by the exemption for small pet animals

  • homeopathic products


We aim to process applications within 10 days of receipt.

Post authorisation

Once you get your authorisation, you’ll have regular inspections.

Inspections are risk based depending on compliance with GDP at the last inspection and the type of veterinary medicines handled.

You must make your site available for inspection and provide any information or samples requested.

Validity of authorisation

Your authorisation is valid indefinitely subject to satisfactory inspections. However, your WDA will be revoked if you don’t deal in veterinary medicines for 5 years.

Variation to an authorisation

You must notify the VMD before making any significant change to your premises, facilities or operations.

You need to complete a variation application form for WDA (ODT, 70.1KB) and send it to the VMD’s inspection administration team to change an existing authorisation.

Your authorisation could be suspended, revoked or changed by force if you make alterations before your change has been approved.

Authorisation conditions

You must have a signed requisition form (signed in ink) to sell any controlled drugs listed in schedule 2 or 3 of the Misuse of Drugs Regulations 2001.

For further information see the Controlled drugs: Veterinary medicines page.

You must use a contract if you want to pass any storage and distribution to another wholesale dealer. The contract must state where the division of responsibilities lies.

You must also do all of the following to meet the conditions of your authorisation:

  • get animal medicines only from authorised manufacturers or wholesale dealers

  • supply animal medicines only to people who are legally allowed to have them, eg retailers who are authorised to supply veterinary medicines to end users

  • only supply animal medicines covered by your wholesale dealer’s authorisation

  • list all your distribution activities in your authorisation

  • store animal medicines in line with storage and transport conditions

  • make sure you have proper stock rotation and carry out a stock audit at least once a year

  • have an emergency recall plan (a system in place that if a recall of the product is required then the company is readily able to identify and contact all their customers)

  • have technically competent staff (who are trained in all of the company procedures and understand the principles of GDP)

  • set up and maintain a quality system (a system detailing your quality and distribution procedures)

Site conditions

Your wholesale dealing premises must be all of the following:

  • weatherproof

  • secure and lockable

  • clean

  • free from contamination

  • capable of storing animal medicines under the required storage conditions

You’re breaking the law if you don’t meet these conditions, and could face prosecution or lose your authorisation.

WDA Qualified Person

You must choose someone to be your wholesale dealer qualified person, (WQP), and register their details with the VMD.

This is someone who is responsible for making sure you’re meeting the conditions of your authorisation. They should regularly check all areas and your quality system, and keep records of the checks they do.

This person doesn’t have to be a pharmacist, but they should know about the conditions of your authorisation and the medicines you distribute.

If they’re not a pharmacist, they should have at least a year’s experience in either of the following:

  • handling, storing and distributing medicines

  • selling or getting medicines

They should also have at least a year’s experience in managing the wholesale distribution of medicines on a similar scale.

You don’t have to employ this person, but they must be available at all times.

Record keeping

You must keep records of all sales for at least 5 years and have them available for inspection. Your records should include all of the following:

  • date and nature of the sale
  • type of animal medicine
  • manufacturer’s batch number
  • expiry date
  • quantity
  • name and address of the supplier or recipient

Storage and transport conditions

You must make sure that proper storage conditions are always maintained, including during transportation, for all medicines including those that:

  • need to be stored at low temperatures (known as cold chain products)

  • should be stored below 25º or 30º C (known as temperate chain products)

You should record temperatures at low and high levels – this includes in contained storage areas within warehouses, eg flammable stores.

You need to continuously record the temperature if you’re storing medicines either in small refrigerators or in warehouses.

If you’re storing medicines in large warehouses you should use temperature mapping (noting the changes in temperature in a single space caused by things like doors opening).

You should repeat temperature mapping every 2 to 3 years and after any major change to the premises, stock layout, or heating system.

You should fit temperature alarms to large and walk-in units and those smaller units used to store products at risk from freezing. Alarms should be checked for correct functioning at the designated set temperatures at least annually.

Transport temperature: cold-chain goods

You should label the storage requirements of any medicines that need to be stored at low temperatures.

You can use insulated containers to transport small volumes of cold-chain goods. You must make sure that products which are damaged by freezing don’t come into direct contact with ice packs at subzero temperatures.

You can ship larger volumes of cold-chain goods in refrigerated transport. You need to use recording probes or individual temperature monitoring devices to monitor temperatures to protect products at risk from freezing.

You need to review the temperature records for each shipment and have in place a procedure for corrective action if anything goes wrong.

Temperature system checks

You need to use measuring and recording devices in critical areas, eg temperature monitoring of storage and transport facilities for cold chain goods at risk from freezing.

Your measurements should be checked against a traceable reference device (i.e the temperature must be calibrated) at least once a year. Your records should show the temperature before and after.

Human medicines

If you wish to supply human medicines for veterinary use under the cascade, you must hold a WDA(H) issued by the Medicines and Healthcare products Regulatory Agency (MHRA).

The MHRA have an agreement with the VMD to issue and administer veterinary authorisations where the company undertakes both human and veterinary activities, so if your company intends to wholesale both veterinary and human products, you should apply to the MHRA. For more information, see their guidance.


You can find a full list on the Register of Wholesale Dealers (PDF, 134KB, 39 pages)

Inspections of Wholesale premises

For changes to this guidance as a consequence of the coronavirus (COVID-19) pandemic please refer to the VMD news and guidance on coronavirus (COVID-19) collection page

We inspect approved wholesaler premises to ensure they comply with the VMR.

Wholesale dealer premises will generally be inspected at least every 4 years; however, this period may be extended for compliant businesses (i.e. no deficiencies) which conduct activities considered to be low risk. The VMD will generally give wholesalers reasonable notice that they intend carrying out a routine inspection.

Inspectors are authorised under the VMR to:

  • inspect the premises, organisational arrangements and procedures used in the storage and distribution of medicinal products
  • interview key personnel named on the authorisation
  • take samples
  • examine any documentation or records relating to the manufacture, assembly, storage and distribution of veterinary medicines

Following an inspection, the inspector will give the wholesaler a report detailing any deficiencies (also referred to as non-compliances). For major and critical deficiencies, the inspector will request details of the measures that have been, or will be, taken to correct them.

The VMD categorises deficiencies as critical, major and other (minor). The report will also include recommendations; observations made by the inspector which, whilst not a legal requirement, would be considered good practice.

Minor (Other) Deficiencies:

  • minor and poses no potential risk to human or animal health, or the environment
  • does not indicate a significant deviation from the requirements of the VMR, Codes of Practice or Guidance
  • cannot be classified as either critical or major because there is insufficient information to classify it as such

Major Deficiencies:

  • non-critical but has produced, or has the potential to produce, a possible risk to human or animal health or the environment
  • a major deviation from the requirements of the VMR
  • a failure to carry out satisfactory procedures to ensure that products are manufactured, stored or distributed in accordance with their specific requirements
  • a combination of more than six other (minor) deficiencies, none of which on their own may be major, but which may together represent a major deficiency and should be explained and reported as such
  • other (minor) deficiencies that have been brought to the attention of the business on previous occasions but have not been resolved

Critical Deficiencies:

  • deficiencies that have produced, or have the potential to produce, a significant risk to human or animal health, or the environment
  • a significant deviation from the requirements of the VMR through serious negligence or intent

Inspections are scheduled at intervals based on the number and type of deficiencies noted during an inspection, as follows:

Inspection findings Compliance category Inspection points* Max inspection interval all GDP sites (months)
0 deficiencies; recommendations only 5 0 56 (low risk sites only)
1-4 minor (other) 4 1-4 48 (all sites other than low risk)
More than 4 minors and/or 1-2 Majors 3 5-14 36
2 Majors plus 1 or more minors up to and including 4 Majors 2 15-28 24
More than 4 Majors and / or any Critical 1 29 and over Follow up inspection as specified on improvement notice, then next inspection in 9-12 months

*A minor deficiency = 1 point, a Major deficiency = 7 points and a Critical deficiency =36 points

Published 1 June 2015
Last updated 20 August 2020 + show all updates
  1. WDA Register updated 18 August 2020

  2. Updated Register of Wholesale Dealer Sites

  3. Updated Register of Wholesale Dealer Sites

  4. Updated application and variation forms and the register of wholesale dealer sites

  5. Updated Register of Wholesale Dealer Sites as at 1 April 2020

  6. Updated register of Wholesale Dealer Sites

  7. Updated Wholesale Dealer register

  8. Current version updated 2 December 2019 of the Register of Wholesale Dealer Sites uploaded

  9. The current version of Register of Wholesale Dealer Sites dated 26 November 2019 uploaded

  10. Updated WDA Register

  11. Wholesaler dealers register updated

  12. Updated Register of Wholesale Dealers

  13. Updated WDA Regiater of Sites

  14. Guidance review and Inspections of Wholesale premises section added

  15. Updated Register of GDP Sites

  16. Updated the Register of Wholesale Dealers to the latest version

  17. Updated Register of Wholesale Dealer Sites

  18. Updated GDP register of sites

  19. Register of Wholesales Dealers updated

  20. Human medicines advice added

  21. Updated WD register

  22. Updated Register of Wholesale Dealers Sites

  23. Updated WDA application forms

  24. Register of wholesale dealers sites updated

  25. Updated Register of Wholesale dealers sites

  26. Updated Register of Wholesale Dealer Sites

  27. First published.