If you are in the RPRA its in the rules - I'm not in the RPRA - but I've seen the list - in the rules
APPENDIX ‘G’
(SEE RULE 199)
PERFORMANCE ENHANCING
DRUGS/SUBSTANCES
1. These Rules are drawn up by the Council
of the Royal Pigeon Racing Association
under the powers granted by virtue of Rule
199.
2. The use in pigeons of the following are
strictly forbidden:
ANABOLIC STEROIDS, BETAAGONISTS,
CORTICO STEROIDS,
ANTI-INFLAMMATORY NONSTEROIDS,
OPIATES, ANALGESICS,
PERFORMANCE ENHANCING
STIMULANTS, SYNTHETIC
HORMONES, ANY DRUG FOUND TO
BE PERFORMANCE ENHANCING
PLUS ANY SUBSTANCE WHICH MAY
BE USED IN AN ATTEMPT TO MASK
THE ABOVE.
When products of which the composition is
not specified are administered, we advise
fanciers to ask for an attestation from their
pharmacist or vet stating that the product
does not contain forbidden substances.
http://rpra.org/LinkClick.aspx?fileticket=zg8HFxQWSfk%3d&tabid=88