Optomease Vet 200mg/ml Concentrate for Solution for Fish Treatment
Active ingredient: Benzocaine
Form
Concentrate
Species
Manufacturer
VIRBAC
VMD MA No.
05653/3008
What it's used for
The veterinary medicinal product is not for use in open water and should always be used in an isolated treatment vessel.
Full indications, dosage and side effects ↓The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.
Paying less for Benzocaine
-
1
Ask your vet for a written prescription
They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
-
2
Fill it at a registered online retailer
The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.
Done — we'll email you when prices land.
Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
Optomease Vet 200mg/ml Concentrate for Solution for Fish Treatment — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
used in an isolated treatment vessel.
medicinal product (equivalent to 30-40 mg of benzocaine per litre of water).
Keep the water well oxygenated before exposure of the fish; immobilization usually
occurs within a few minutes of immersion.
The maximum exposure time must not exceed 15 minutes. In general, the total
exposure time of the fish to the solution should be controlled as there are different
levels of tolerance among species and rearing conditions.
For recovery, transfer the anaesthetized fish into clear, well oxygenated water. Do not
feed the fish for at least 48 hours prior to anaesthesia.
None known.
Reporting adverse events is important. It allows continuous safety monitoring of a
veterinary medicinal product. Reports should be sent, preferably via a veterinarian, to
either the marketing authorisation holder or the national competent authority via the
national reporting system. See the package leaflet for respective contact details.
Special precautions for safe use in the target species:
During anaesthesia, the fish must be closely monitored. A number of factors influence
AN: 01138/2025Page 2 of 6
the efficacy and safety of the veterinary medicinal product, including concentration of
the drug in water, duration of exposure, temperature, oxygen and density of biomass.
Hence it is recommended to test the selected drug concentration and exposure time is
conducted with a small group of representative fish before large numbers are
medicated, particularly when water temperature is at the upper or lower ends of the
normal temperature ranges for the species being treated. The veterinary medicinal
product should be dissolved in water of the same composition and characteristics as
that to which the fish are accustomed.
-To minimise damage and loss when medicated the level of sedation should allow
fish to maintain their equilibrium and swimming position.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Benzocaine may cause hypersensitivity (allergy) following ingestion or contact with the
skin or mucosa. In rare cases, benzocaine may cause methaemoglobinaemia
(excessive methaemoglobin in the blood) in people who are hypersensitive. Cyanosis
(blue skin or lips) may occur as a result of excessive methaemoglobin concentrations.
People with known hypersensitivity to benzocaine or who have been advised not to
work with such preparations should avoid contact with the veterinary medicinal
product.
Foetal deaths may occur following administration of benzocaine in human beings.
Pregnant women should be extra careful to avoid exposure if handling the veterinary
medicinal product.
As an anaesthetic, benzocaine may cause adverse reactions, including nervous,
respiratory and cardiovascular alterations. This includes direct contact with skin, which
can cause local anaesthesia, and prolonged exposure may cause dermatitis.
This veterinary medicinal product also contains DMSO as an excipient, which may be
irritant to the skin.
Avoid contact with the eyes, skin and clothing.
Personal protective equipment consisting of impermeable gloves should always be
worn when handling the veterinary medicinal product and preparing stock solution or
the anaesthetic bath.
Do not eat, drink or smoke when handling the veterinary medicinal product or the
anaesthetic bath.
In case of contact with the eyes, flush immediately with plenty of clean water. In case
of skin contact, wash the exposed area immediately with plenty of water. Remove
contaminated clothes immediately. If you develop symptoms following exposure, seek
medical advice immediately and show the package leaflet or the label to the physician.
In case of accidental ingestion, seek medical advice immediately and show the
package leaflet or the label to the physician. Vomiting may be induced; activated
charcoal may be administered.
Wash hands thoroughly after use.
Special precautions for the protection of the environment:
In order to protect the environment, used solution must be transferred to a holding
tank filled with water with subsequent controlled release for dilution in the effluent to
be discharged from the facility. See section 5.5.
AN: 01138/2025Page 3 of 6
Store in the original container.
Keep the container tightly closed.
Protect from light.
Do not use during stripping of fish eggs intended for human consumption.
This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.
Medication costs adding up?
Pet insurance can cover prescription medications. Find the right policy for your pet.
Other Products Containing Benzocaine
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Alternative options to consider
Retailers we earn a commission from. It costs you nothing and never changes what we show.
The Pharm Pet Co. — Pet Pharmacy
UK online pet pharmacy. Flea, worm, prescription medications, supplements and pet food. Save vs vet prices.
Pet Care at Pharmacy2U
The UK's largest online pharmacy. Pet wormers, flea treatments, dental and joint care. Free delivery on orders over £30.
KatKin Fresh Cat Food
The UK's top-rated cat food. 100% fresh, human-quality meat, gently cooked and delivered frozen. Vet-formulated for every life stage.
We may earn a small commission if you purchase through these links, at no extra cost to you.
Related Medications
Adrenacaine Solution for Injection for Cattle
POM-VPSEpinephrine + Procaine Hydrochloride
Alfaxan Multidose 10 mg/ml Solution for Injection for Dogs, Cats and Pet Rabbits
POM-VAlfaxalone
Alfaxan Multidose 10 mg/ml Solution for Injection for Dogs, Cats and Pet Rabbits
POM-VAlfaxalone
Anaestamine 100 mg/ml Solution for Injection
POM-VKetamine
Anesketin 100 mg/ml Solution for Injection for Dogs, Cats and Horses
POM-VKetamine
Anesketin 100 mg/ml Solution for Injection for Dogs, Cats and Horses
POM-VKetamine
Find cheaper vets near you
Compare vet consultation prices in your area. Save on procedures and get a prescription to buy medications online.