There is zero scientific evidence that any of the lasix adjuncts do anything to help decrease EIPH. I wouldn't worry about it.
From Kentucky Horse Racing Commission med guidelines here:
http://khrc.ky.gov/Pages/EquineHealth.aspx
Quote:
Section 6. Furosemide and Adjunct Bleeder Medication; Use on Race Day. (1) Furosemide may be administered, in accordance with this section, to a horse that is entered to compete in a race.
(2) Furosemide may be used under the following circumstances:
(a) Furosemide shall be administered at a location under the jurisdiction of the commission, by a single intravenous injection, not less than four (4) hours prior to post time for the race in which the horse is entered.
(b) The syringe employed in the injection shall be provided immediately to the commission veterinarian, steward, or commission employee, if requested, to determine if there has been a violation of this administrative regulation.
(c) The furosemide dosage administered shall not exceed 500 mg, nor be less than 150 mg.
(d) The specific gravity of a post-race urine sample shall not be below 1.010. If the specific gravity of the post-race urine sample is determined to be below 1.010, a quantification of furosemide in serum or plasma shall be performed. Concentrations above 100 nanograms of furosemide per milliliter of serum or plasma shall constitute a violation of this section.
(e) A horse eligible to receive furosemide pursuant to Section 7 of this administrative regulation that does not show a detectable concentration of the drug in the post-race urine, plasma, or serum shall be in violation of this administrative regulation.
(3) Up to two (2) of the following adjunct bleeder medications may be administered to a horse not less than four (4) hours prior to post time for the race in which the horse is entered:
(a) Aminocaproic acid:
(b) Carbazochrome:
(c) Conjugated estrogens; and
(d) Tranexamic acid.
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