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Dectospot (Formerly Spotinor Spot-on)

Dectospot (Formerly Spotinor Spot-on)
10mg/ml » 250ml Bottle

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  • 10mg/ml » 250ml Bottle £37.00
  • 10mg/ml » 500ml Bottle £61.49
  • 10mg/ml » 1 Litre Bottle £109.49
  • 10mg/ml » 2.5 Litre Bottle £259.00

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£37.00 to £259.00


Dectospot (Formerly Spotinor Spot-on) is a deltamethrin spot on solution for the treatment and prevention of infestations by lice and flies on cattle- ticks, lice, keds and established blowfly strike on sheep and lice and ticks on lambs.

Active Ingredient

Each ml contains: Deltamethrin 10 mg

Pharmaceutical Form

Spot-On Solution A clear pale gold oily liquid


For the treatment and prevention of infestations by lice and flies on cattle- ticks, lice, keds and established blowfly strike on sheep and lice and ticks on lambs. On cattle: For the treatment and prevention of infestations by both sucking and biting lice, including Bovicola bovis, Solenopotes capillatus, Linognathus vituli and Haematopinus eurysternus in beef and dairy cattle. Also as an aid in the treatment and prevention of infestations of both biting and nuisance flies including Haematobia irritans, Stomoxys calcitrans, Musca species and Hydrotaea irritans. On sheep: For the treatment and prevention of infestations by ticks Ixodes ricinus and by lice (Linognathus ovillus, Bovicola ovis), keds (Melophagus ovinus) and established blowfly strike (usually Lucilia spp). On lambs: For the treatment and prevention of infestations by ticks Ixodes ricinus and by lice Bovicola ovis.


For external use. Dose: Cattle: 100 mg of deltamethrin per animal corresponding to 10 ml of product. Sheep: 50 mg of deltamethrin per animal corresponding to 5 ml of product Lambs (under 10 kg bodyweight or 1 month of age): 25 mg of deltamethrin per animal corresponding to 2.5 ml of product. Administration: Apply a single dose with the special Squeeze & Pour dispenser pack or the Spot-On Applicator in one spot on the mid-line of the back at the shoulders. For blowfly strike on sheep, see following specific indication directions. Lice on cattle: One application will generally eradicate all lice. Complete clearance of all lice may take 4 - 5 weeks during which time lice hatch from the eggs and are killed. A very few lice may survive on a small minority of animals. Flies on cattle: For the treatment and prevention of infestations by biting and non-biting flies. Where horn-flies predominate, treatment and prevention of infestations can be expected for 4 - 8 weeks. Treatment for flies should not be repeated within four weeks. Ticks on sheep: Application to the mid-point of the shoulders will provide useful treatment and prevention of infestations by ticks attaching to animals of all ages, for up to 6 weeks after treatment. Keds and lice on sheep: Application to the mid-point of the shoulders of sheep in short or long fleece will reduce the incidence of a biting louse or ked infestation over a 4 - 6 week period after treatment. It is advisable to: - treat shortly after shearing (animals with short fleece), - keep treated sheep separated from untreated sheep to avoid re-infestation. N.B. For treatment and prevention of infestations by ticks, keds and lice on sheep, the fleece should be parted and the Spot-On applied to the skin of the animal. Established blowfly strike on sheep: Apply directly to the maggot infected area as soon as the fly strike is seen. One application will ensure blowfly larvae are killed in a short time. In the case of more advanced strike lesions, clipping out of stained wool before treatment is advisable. Lice and ticks on lambs: Application to the mid-point of the shoulders will provide useful treatment and prevention of infestations by ticks for up to 6 weeks after treatment, and will reduce the incidence of biting lice over a 4-6 week period after treatment.


Do not use on convalescent or sick animals. Do not use in cases of known hypersensitivity to the active substance or any of the excipients. Extra-label use of the product in the non-target species dogs and cats can lead to toxic neurological signs (ataxia, convulsions, tremors), digestive signs (hypersalivation, vomiting), and may be fatal.

Special Warnings

To avoid resistance, the product should only be used if the susceptibility of the local fly population to the active substance is assured. Cases of resistance to deltamethrin have been reported in stinging and nuisance flies in cattle and lice in sheep. The product will reduce the number of flies resting directly on the animal but it is not expected to eliminate all flies on a farm. The strategic use of the product should, therefore, be based on local and regional epidemiological information about susceptibility of parasites, and used in association with other pest management methods. Care should be taken to avoid the following practices because they increase the risk of development of resistance and could ultimately result in ineffective therapy: - too frequent and repeated use of ectoparasiticides from the same class over an extended period of time- - underdosing which may be due to underestimation of bodyweight, misadministration of the product, or lack of calibration of the dosing device. If clinical signs do not resolve following treatment, the diagnosis should be revised. (i) Special precautions for use in animals: The product is for external use only. Do not apply on or near the animals eyes and mucous membranes. Care should be taken to prevent licking of the product. Avoid use of the product during extremely hot weather and ensure animals have adequate access to water. The product should only be administered onto undamaged skin as toxicity is possible due to absorption from major skin lesions. However, signs of local irritation may occur after treatment as skin may be already affected by infestation. (ii) Special precautions to be taken by the person administering the product to the animal: Persons with known hypersensitivity to the product or one of its components should avoid contact with the veterinary medicinal product. Wear protective clothing including waterproof apron and boots and impervious gloves when either applying the product or handling recently treated animals. Remove heavily contaminated clothing immediately and wash before use. Wash splashes from skin immediately with soap and plenty of water. Wash hands and exposed skin after handling this product and before meals. In case of contact with eyes, rinse immediately with plenty of clean, running water and seek medical advice. In case of accidental ingestion, wash out mouth immediately with plenty of water and seek medical advice. Do not smoke, drink or eat while handling the product. This product contains deltamethrin which may produce tingling, itchiness and blotchy redness on exposed skin. If you feel unwell after working with this product, consult your doctor and show this label. To the physician: Advice on clinical management is available from the National Poisons Information Service. (iii) Other Precautions: Deltamethrin is very toxic to dung fauna, aquatic organisms and honey bees, is persistent in soils and may accumulate in sediments. The risk to aquatic ecosystems and dung fauna can be reduced by avoiding too frequent and repeated use of deltamethrin (and other synthetic pyrethroids) in cattle and sheep, e.g. by using a single treatment per year on the same pasture The risk to aquatic ecosystems will be further reduced by keeping treated cattle away from water bodies for four weeks after treatment.

Adverse Reactions

Squamosis and pruritus have been seen in some cattle during the 48 hours after treatment.

Withdrawal Period

Cattle: Meat and offal: 17 days, Milk: zero hours. Sheep: Meat and offal: 35 days, Milk: Not authorised for use in ewes producing milk for human consumption.

Packaging Size

200ml, 500ml, 1L, 2.5L

Shelf Life

3 years. Shelf-life after first opening the immediate packaging: 6 months

VM Number


Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

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 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. To find the exact cost of shipping your item, and to see all options available, follow these steps:

  1. Put the items you wish to order in your basket
  2. Proceed to checkout and enter your delivery address, including country
  3. Delivery information including price will automatically update to what is available to you

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as non-ambient items 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.


Q & A

Below are some recent questions we've received regarding Dectospot (Formerly Spotinor Spot-on), including answers from our team.

27 March 2017 at 7:19pm

Can I use this on goats?

Fiona Crosbie

  • VioVet customer since 2016
  • From: South Lanarkshire, United Kingdom

One of my Golden Guernsay goats appears to have lice. I am having difficulty finding a product which even mentions goats!
Would this be safe? Or could you recommend an alternative?

  • Veterinary Advisor

There are very few products that are actually licensed for goats. Spotinor should be fine to use or Zoetis Spot On Insecticide. However because neither are licensed for goats you will unfortunately need a prescription from your vet but we will be happy to supply you with it once you have a prescription. You could also speak to your vet about an injection of Dectomax which can be used to treat lice and mites in goats.