Azasure

Main information

  • Trade name:
  • Azasure 500 mg/ g Powder for Suspension for Fish Treatment
  • Pharmaceutical form:
  • Powder for suspension for fish treatment
  • Prescription type:
  • POM-V - Prescription Only Medicine – Veterinarian
  • Medicine domain:
  • Animals
  • Medicine type:
  • Allopathic drug

Documents

Localization

  • Available in:
  • Azasure 500 mg/g Powder for Suspension for Fish Treatment
    United Kingdom
  • Language:
  • English

Therapeutic information

  • Therapeutic group:
  • Salmon (Atlantic)
  • Therapeutic area:
  • Ectoparasiticide

Status

  • Source:
  • VMD - Veterinary Medicines Directorate
  • Authorization status:
  • Authorized
  • Authorization number:
  • 49145/4000
  • Authorization date:
  • 04-12-2013
  • Last update:
  • 19-01-2018

Summary of Product characteristics: dosage, interactions, side effects

Revised March 2019

AN: 00791/2018

SUMMARY OF PRODUCT CHARACTERISTICS

1.

NAME OF THE VETERINARY MEDICINAL PRODUCT

Azasure 500 mg/g Powder for Suspension for Fish Treatment [UK]

Azasure vet 500 mg/g Powder for Suspension for Fish Treatment [NO]

2.

QUALITATIVE AND QUANTITATIVE COMPOSITION

Active Substance:

1g of product contains azamethiphos 500mg

Excipients:

For full list of excipients, see Section 6.1.

3.

PHARMACEUTICAL FORM

Powder for suspension for fish treatment.

Fine beige powder in water soluble sachet.

4.

CLINICAL PARTICULARS

4.1

Target species

Farmed Atlantic salmon (Salmo salar)

4.2

Indications for use (specifying the target species)

For the control of mature pre-adult to adult sea-lice (Lepeophtheirus salmonis)

or (Caligus species) on farmed Atlantic salmon.

4.3

Contraindications

None

4.4

Special warnings (for each target species)

Repeated use of the same class of chemotherapeutic agent may result in the

development of resistance.

In order to reduce the risk of resistance to the product developing, the product

should be used as part of a multi-tactic pest-management program.

Oxygenation must be provided during treatment. Vigorous oxygenation is

recommended in the treatment cage. Where several cages are to be treated

a large reservoir of oxygen bottles should be available.

Do not use the product prophylactically. Only use when infestation with adult

lice has been diagnosed.

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4.5

Special precautions for use

i

Special precautions for use in animals

At water temperatures above 10

C it is advisable to limit treatment periods to

30 minutes. Vigorous oxygenation of the water must be provided during

treatment.

For external use only.

During treatment, careful observation of fish behaviour must be maintained. If

signs of distress, e.g., fish falling on their side, occur after 30 minutes of

treatment, remove the tarpaulin and ensure vigorous oxygenation of the

water.

The product should be applied to salmon suffering from infestation with sea-

lice before the stage at which serious skin damage is evident.

ii.

Special precautions to be taken by the person administering the

medicinal product to animals

The prescribing veterinary surgeon must ensure that farm staff have received

adequate instruction in the safe use of the product.

MAY CAUSE SENSITISATION BY INHALATION AND SKIN CONTACT

The Control of Substances Hazardous to Health Regulations 1988 (COSHH)

applies to the use of this product at work.

The product contains azamethiphos. Azamethiphos is an organophosphorus

compound. DO NOT USE if under medical advice not to work with such

compounds.

WEAR SUITABLE PROTECTIVE CLOTHING (WATERPROOF COVERALLS),

SUITABLE PROTECTIVE GLOVES (heavy duty gauntlet style nitrile at least

300mm in length and 0.5mm thick are recommended) AND FACE

PROTECTION (FACE SHIELD) when handling the concentrate (i.e., mixing or

transferring product from one container to another) and when applying the

diluted chemical to the pen. Renew protective clothing and gloves regularly and

certainly when cracking or damage has occurred. Initial dilution of the water

soluble bags into a small volume of distilled water must be carried out on land,

ensure that the drum container is securely closed during this process.

RINSE APPLICATION EQUIPMENT AND CONTAINERS AFTER USE

WASH ALL PROTECTIVE CLOTHING thoroughly after use especially the

insides of gloves.

REMOVE HEAVILY CONTAMINATED CLOTHING IMMEDIATELY, wash or

destroy.

DO NOT EAT, DRINK OR SMOKE without first withdrawing from the work area,

removing protective clothing and washing hands, face and exposed skin.

AVOID ALL CONTACT BY MOUTH, WITH THE SKIN OR EYES.

ACCIDENTAL SPLASHES ON EXPOSED SKIN OR EYES should be washed

off immediately with plenty of water.

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AN: 00791/2018

WASH HANDS, FACE AND EXPOSED SKIN after leaving the work area.

KEEP AWAY FROM FOOD, DRINK AND ANIMAL FEEDINGSTUFFS.

MEDICAL ADVICE TO USERS

If you have previously felt unwell after using a product containing an

organophosphorus compound consult your doctor before working with

this product and show your doctor the product label.

If you feel unwell after using this product consult your doctor and show

your doctor the product label.

Treat any cases of heavy contamination as an emergency. You should

go straight to hospital after removing contaminated clothing, and rinse

with plenty of water areas of skin which came into contact with the

product.

If the product has been swallowed go straight to hospital and take the

product label with you.

MEDICAL ADVICE TO DOCTORS

Poisoning from organophosphorus compounds results from blockage of

acetylcholinesterase, with a resultant over-activity of acetylcholine.

Symptoms include headache, exhaustion and weakness, mental confusion

together with blurred vision, excessive salivation and sweating, cramp-like

abdominal pain, chest tightness, diarrhoea, constricted pupils and

bronchorrhea. These may develop for up to 24 hours after exposure.

Severe poisoning can include general muscle twitching, loss of coordination,

extreme difficulty with breathing and convulsions which may lead to

unconsciousness in the absence of medical treatment. Treat symptomatically

and seek urgent hospital transfer if poisoning is suspected.

Advice on clinical management is available from the National Poisons

Information Service.

REPORTING INCIDENTS

In the UK

Illness suspected to be a result of working with the medicine may be reportable

under the Reporting of Injuries, Diseases and Dangerous Occurrences

Regulations 1995. If in doubt contact your local Health and Safety Executive

Officer.

Report human or veterinary suspected adverse reactions online to the

Veterinary Medicines Directorate.

In Norway

Adverse reactions, including human reactions, should be reported to the

Norwegian Medicines Agency, www.noma.no.

Further advice can be obtained from: Naqua Limited, Unit 8, Starborough Farm,

Starborough Road, Nr Edenbridge, Kent, TN8 5RB

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AN: 00791/2018

iii.

Other Precautions

The product is very dangerous to crustaceans and dangerous to fish and

other aquatic organisms. Therefore the product should not be used in sea

farms where crabs or lobsters are kept in the close proximity of the treated

sea cages.

Frequent use and/or use on a larger scale may pose an increased risk to the

environment. In order to ensure safe use (including large scale and multiple

treatments) of the product under a combination of different environmental

conditions (e.g. low water current speeds, shallow waters, short distance to

the shore etc.) local environmental regulations governing discharges, where

applicable, must be adhered to. If there is any doubt about safe use,

relevant competent authorities should be consulted or professional

advice sought accordingly.

The most important mechanism for removal of the product in coastal waters is

dilution which is increased by water movements including the flushing effects

in sea lochs. After treatment care should be taken to provide sufficient water

exchange through the net to dilute residual azamethiphos. The water

movements from a boats propeller may be used to increase water exchange

in cases where low water exchange rates cannot be avoided. These

measures will help to prevent possible adverse effects on aquatic life.

For countries where an environmental authorisation is not required at each

individual site, the following risk mitigation measures should be followed.

At sites with cages ≥ 150m in circumference a maximum of one cage should

be treated per day.

At sites with cages 120 – 149m in circumference, a maximum of two cages

should be treated per day.

4.6

Adverse reactions (frequency and seriousness)

None

4.7

Use during pregnancy, lactation or lay

Not applicable

4.8

Interaction with other medicinal products and other forms of interaction

No data available

4.9

Amount(s) to be administered and administration route

Fish affected by sea-lice should be bathed in 0.2 ppm of the product (0.1 ppm

azamethiphos) for a period of not less than 30 minutes and not more than 60

minutes. At water temperatures above 10

C it is advisable to limit treatment

periods to 30 minutes. Assess water volume as accurately as possible.

To achieve a final concentration of 0.1 ppm azamethiphos, 0.2g of the powder

must be added per cubic metre of water, i.e., 1 x 20g sachet treats 100 cubic

meters and 1 x 100g sachet treats 500 cubic metres.

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The product does not affect juvenile attached sea-lice which will be present

with the pre-adult and adult stages. These juvenile stages will develop into

pre-adults and adults in 10 to 20 days, when a population count should show

whether a second treatment is necessary. A third treatment may be

necessary after another 14 days, after which fish should be lice free for

considerable periods, if all fish on the site have been simultaneously treated.

Oxygenation must be provided during treatment. Vigorous oxygenation is

recommended in the treatment cage. Where several cages are to be treated

a large reservoir of oxygen bottles should be available.

On dry land, not more than 48 hours prior to treatment, operators wearing

suitable equipment and protective clothing, (See OPERATOR

PRECAUTIONS), should place the required number of water soluble bags of

the product required for the dosage of an individual cage into a labelled

screw-topped polyethylene container, together with a quantity of distilled

water (1 litre or more of distilled water for every 200g of product).

Screw the lid tightly onto the container and gently shake this intial dilution for

up to 5 minutes. When fish are ready to be treated, the diluted suspension of

product should be further diluted into approximately 200 litres of sea water

and gently stirred for 5 minutes. The polyethylene container, in which the first

dilution was prepared, should be rinsed with sea water and the rinsing from

this should be added to the next dilution. This latter mixture should then be

immediately and carefully added to the cage by pouring or pumping the

mixture into the water at the oxygen diffuser points using the Bath Technique.

THE BATH TECHNIQUE

In this technique, the depth of the fish cage net is reduced to a known depth

at the centre, and a tarpaulin placed around the net so that it is totally

enclosed. Ensure the base of the cage is not drooping when in the raised

position as fish may congregate and come to harm. The volume of water to

be treated should be estimated as accurately as possible. Oxygen is

immediately bled into the system and the product is added. After 30 to 60

minutes the tarpaulin is removed.

4.10

Overdose (symptoms, emergency procedures, antidotes), if necessary

Azamethiphos induces little change in brain acetylcholinesterases at

therapeutic concentrations but some fish may show hyperactivity. At

concentrations in excess of 0.1ppm signs of stress, stupor and in extreme

cases death may occur. If acute toxicity is seen the treatment should be

stopped and oxygenation increased to aid recovery.

4.11

Withdrawal period(s)

Fish for human consumption may be taken only after 10 degree days after the

end of the treatment.

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AN: 00791/2018

5.

PHARMACOLOGICAL PROPERTIES

ATC Vet Code: QP 53 AF 17

Antiparasitic Products, Insecticides and Repellants

5.1

Pharmacodynamic properties

Azamethiphos is an organophosphorus insecticide.

Resistance of sea lice to azamethiphos, and other organophosphates, can

occur through alteration of acetylcholinesterase due to genetic mutation

influenced by natural selection.

5.2

Pharmacokinetic properties

Radiolabelled metabolism studies in salmon have shown azamethiphos

residues in tissues and organs are depleted quickly and are below the limit of

detection within 1 hour of immersion in a bath containing the maximum

recommended dose.

5.3

Environmental properties

Azamethiphos is highly soluble in water (>1 g/L) with a low octanol/water

partition coefficient (log Kow) of 1 g/mL. These characteristics indicate that

azamethiphos will remain in the aqueous phase and will not bioconcentrate or

bioaccumulate in biota. Azamethiphos has a moderate propensity

to adsorb to suspended organic matter (koc 500 l/kg), however it

is unstable in saltwater, degrading with a half-life <5 days (12 C) producing

non-toxic transformation products. See also 4.5.iii.

6.

PHARMACEUTICAL PARTICULARS

6.1

List of excipients

Sodium Laurilsulfate

Naphthalene Sulphonic Acid Formaldehyde Concentrate

Kaolin Light

Silica, colloidal anhydrous

6.2

Major incompatibilities

None known.

6.3

Shelf life

Shelf-life of the veterinary medicinal product as packaged for sale:

2 years.

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6.4

Special precautions for storage

Do not store above 25ºC.

Store in the original unopened packaging.

Store in a dry place.

Store away from food, drink and animal feedingstuff.

6.5

Nature and composition of immediate packaging

20g pack size;

Heat-sealed polyvinylalcohol water soluble bag containing 20g of product

contained in a sealed aluminium/polyethylene sachet.

Either 2 x 20g packages in an outer carton or 5 x 20g packages in an outer

carton.

100g pack size;

Heat-sealed polyvinylalcohol water soluble bag containing 100g of product

contained in a sealed aluminium/polyethylene sachet.

Either 1 x 100g package in an outer carton or 5 x 100g packages in an outer

carton.

Not all pack sizes may be marketed.

6.6

Special precautions for the disposal of unused veterinary medicinal

product or waste materials derived from the use of such products, if

appropriate

This product is dangerous to fish and other aquatic organisms in the

concentrated form. Do not contaminate ponds, streams, lochs or inlets with

product or used packaging.

Any unused veterinary medicinal product or waste materials derived from

such veterinary medicinal products should be disposed of in accordance with

local requirements.

7.

MARKETING AUTHORISATION HOLDER

Ground Animal Health Ltd

Unit 8 Dock Offices

Surrey Quays Road

London

England

SE16 2XU

8.

MARKETING AUTHORISATION NUMBER

Vm 49145/4000

9.

DATE OF FIRST AUTHORISATION

04 December 2013

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10.

DATE OF REVISION OF THE TEXT

March 2019

Approved: 29 March 2019

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