DETECTION TIMES
Substance

Preparation

Dose

Route ofAdministration(no of horses)

DetectionTime(hours)

Acepromazine

Sedalin®
Vetoquinol UK Ltd

0.15mg/kg, single
dose

Oral (6)72

Altrenogest

Regumate® Equine
MSD Animal Health

2.2mg/kg for 10days, once daily

Oral (4)288

Butorphanol

Torbugesic®
Fort Dodge Animal
Health Ltd

100µg/kg, single
dosei.v. (6)72i.v. (6)72

i.v. (6)≤48^

i.v. (6)264

Oral (‡ see note)(2)96

1.6µg/kg/day for 10Days, once daily

Oral (6)312

0.3µg/kg/day for 5Days, once daily

Nebulised$ (6)144

Oral (‡ see note)(12)≤48^5

Oral (6)96

i.v. (10)≤48^

i.v. (6)722i.m (6)336

i.v. (6)

120

Butyl
Scopolamine/
Dipyrone(Metamizole)
Butyl
scopolamine
Carprofen
Cetirizine

Clenbuterol

Clenbuterol
Dantrolene
Dembrexine
Detomidine

Buscopan™
Compositum
Boehringer Ingelheim
Buscopan®
Boehringer Ingelheim
Rimadyl®
Pfizer LtdAllacan® (Bristol
Laboratories Ltd)
Ventipulmin™ Syrup(25 micrograms/ml)
Boehringer Ingelheim
Ventipulmin™ Injection(30 micrograms/ml)
Boehringer Ingelheim
Dantrium®
Sputolysin®
Boehringer Ingelheim
Domosedan®
Orion Pharma, Finland

Detomidine/
Butorphanol

Domosedan® Janssen
Torbugesic® Pfizer

Dexamethasone
isonicotinateVoren®
Boehringer Ingelheim
Ltd

Dexamethasone
sodiumphosphate

Dexadreson®
Intervet UK Ltd

0.2mg/kg butyl
scopolamine/25mg/kg dipyrone(Metamizole), single
dose
0.3mg/kg, single
dose
0.7mg/kg, single
dose
190mg twice dailyfor 4.5 days (9doses)

500mg for 3 days,
once daily
0.3mg/kg, 9 doses at
12h intervals
0.02mg/kg, single
dose
10µg/kg followed
after 5 minutes with25µg/kg Torbugesic®,
single dose
0.03mg/kg, single
dose(15ml/500kg horse)
0.06mg/kg, single
dose(15ml/500kg horse)Dipyrone

EltenacFirocoxib

Vetalgin®
Intervet Deutschland
GmbHTelzenac®
Schering Plough Animal
HealthEquioxx®
Merial30mg/kg, single
dosei.v. (10)720.5mg/kg for 5days,
once
Daily
100µg/kg for 7 days,
once dailyi.v. (6)192

Oral (20)360 (15days)

Flunixin

Finadyne®
Schering Plough

1mg/kg, single dosei.v. (4)144

Furosemide

Dimazon™
Intervet

1mg/kg, single dosei.v. (6)≤48^Hydroxyzine

Atarax® (AlliancePharmaceuticals Ltd)

500mg twice dailyfor 4.5 days (9doses)

Oral (‡ see note)(6)96

5.5µg/kg/day for 3Days, once daily(16.5µg/kg in total)

Nebulised** (‡see note) (6)[MDI-Spacer]

120
[168]

i.v. (6)96

Ipratropium

Ketoprofen

Lidocaine

Meclofenamicacid
Meclofenamic
acidMeloxicam

Mepivacaine

Mepivacaine

Atrovent™ solution for
nebulisation( 0.5 mg /ml)
Boehringer Ingelheim
Ketofen®
Merial Animal Health LtdNorocaine®
Norbrook Laboratories
Not commerciallyavailable.
Sigma (†see footnote)Dynoton
Biove Laboratory
Arques, FranceMetacam®
Boehringer Ingelheim
Intra-Epicaine®
Arnolds Vet Products
Ltd
Intra-Epicaine®
Arnolds Vet Products
Ltd

Misoprostol

Cytotec®

Naproxen

Naprosyn™
Roche

2.2mg/kg for 5days,
once daily
300mg/15mL, single
dose
60mg/3mL, single
dose

s/c (6)72
s/c (6)2.2mg/kg/single
Dosei.v. (‡ see note)
(6)

≤48^

4mg/kg for 5 days,
once daily

Oral (‡ see note)
(6)

120

Oral (8)72s/c to lateral
aspectof distal limb (6)72

s/c neck (6)72

0.6mg/kg for
14days, oncedaily
2mL/40mg, single
dose(0.07 – 0.09mg/kg)
8mL/160mg, single
dose(0.28 – 0.36mg/kg)
5µg/kg for 14 days,
twice daily
10mg/kg for 5 days,
once daily

Oral (‡ see note)(6)
Oral (‡ see note)
(6)

≤48^
>360 (15days)Omeprazole

Gastrogard ®37% oral
Paste
MerialEquipazolone®
Arnolds Vet Products
Ltd
Phenylarthrite™
Vetoquinol SA

Phenylbutazone

Prednisolone
Procaine
benzylpenicillin

Equipazolone®
Intervet SA

Prednidale® 25 mg
Dechra
Depocillin®
MSD Animal HealthRomifidine

Sedivet®
Boehringer IngelheimRomifidine/Butorphanol

Sedivet® Boehringer
Ingelheim
Torbugesic® Pfizer

Salbutamol

Ventolin Evohaler®
Allen & Hansburys

Vedaprofen

Quadrisol®
Intervet SA

1mg/kg for 28days,
once daily

Oral (* seenote)

4.7mg/kg for 5days,
twice daily

Oral (2)≤48^4i.v. (6)8.8mg/kg, singledose
168
8.8mg/kg for 1 day,twice daily followedby;
4.4mg/kg for 10days,
twice daily

Oral (6)1mg/kg, single dose

Oral (6)≤ 48^

12mg/kg for 5 days,
once or twice dailyi.m. (4)24080µg/kg, single dosei.v. (8)60i.v. (6)72Inhaled via apMDI through aspacer intonostrils (‡ seenote) (6)7232mg/kg, single dose

i.v. (6)96

Administered
via Metered
Dose Inhaler
plus Equi-Haler®
(Kruse) device(‡ see note)(6)≤ 48 hours,
not yetagreedinternationa
lly but to be
adopted asinterim by
the BHA

i.v. (6)7260µg/kg followed
after 5 minutes with
25µg/kg Torbugesic®,
single dose
5 x 100µg actuations
per dose for 2 days at
4 hourly dosing
during day

Salmeterol*Serevent® Evohaler
GSK

0.1 mg (4x25µg/actuation perdose) for 5 days,
twice daily

Xylazine

Chanazine®
Chanelle Animal Health

0.4mg/kg, singledose† Prepared according to Johansson et al Pharmaceutical & Biomedical Analysis (1986) 4, 2 171-179* Calculated from several studies involving differing numbers of horses** Note that the previously released DT of 7 days relates to this product being given via a Metered Dose
Inhaler/Spacer administration system whereas this 5 day advice relates to true nebulisation.
$ This route of administration is not licensed in the UK‡These products are licenced human medications and therefore should be used in accordance with Veterinary
Medicine Regulations guidance on the use of the cascade, including precautions to ensure human safety.
^The BHA, an EHSLC member country, requires that a prohibited substance may not be given on the day of arace. Other EHSLC member countries advise that a prohibited substance may not be given within 48 hours, orlonger, of a race. Therefore, no Detection Times ≤ 48 hours will be advised by the EHSLC with whom the BHA
harmonise Detection Times.
For further information on the administration of altrenogest, please see the following notice:https://www.britishhorseracing.com/wp-content/uploads/2018/09/BHA-Notice-Regumate-200918.pdf

Increase in Detection Time from that previously published. New Detection Time applicable from 28
November 2011.

2 Increase in Detection Time from that previously published by BHA. New Detection Time applicable from 1
October 2012.

 Decrease in Detection Time from previously published level. New Detection Time applicable from 28
November 2011.

3 Decrease in Detection Time from previously published level. New Detection Time applicable from 1 March2014

4 Decrease in Detection Time from previously published level. New Detection Time applicable from 1February 2019

5 Decrease in Detection Time from previously published level. New Detection Time applicable from 1 June2019.