"When I heard about the salbutamol
case, it just didn't stack up.
The UCI, cycling's world governing body, abruptly dropped its nine-month investigation into a presumed Adverse Analytical Finding that Froome returned at last year's Vuelta for the asthma drug salbutamol
"WADA's scientific department has access to information that UCI does not, including ongoing and unpublished studies on the excretion of Salbutamol
(which is - as confirmed by the WADA scientific director - subject to considerable variations)," the statement said.
is an asthma treatment, and Froome used the column to outline his history of suffering from asthma since childhood, and of managing his medication as a professional athlete.
The UCI announced on Monday that it had ended its nine-month investigation into Froome resulting from an adverse analytical finding for Salbutamol
he returned en route to victory at La Vuelta last September.
He recorded an adverse analytical finding (AAF) for salbutamol
, an asthma medication, meaning he exceeded the allowed dose of a permitted substance.Dumoulin's coach and sports director Luke Roberts of Australia said he was "not particularly concerned" about the case.
Team Sky claim he was only 19 per cent over the salbutamol
limit when dehydration was taken into account.
Although Froome's sample was reported to contain a concentration of salbutamol
in excess of 1000ng/ ml, the UCI said it had closed the case based on World Anti-Doping Agency (WADA) advice pertaining to permitted use.
An athlete can be cleared for excessive salbutamol
use if he proves that it was due to an appropriate therapeutic dosage.
The British-based team, whose riders have won the Tour five times in the last six years, said: "We are confident Chris will be riding the Tour as we know he has done nothing wrong." Under UCI's rules, Froome is entitled to carry on racing until his salbutamol
case is resolved.
Froome won last year's Vuelta, but risks being stripped of the title after returning a positive test for salbutamol
following Stage 18.
sulphate is a [beta]-2 adrenergic agent with a greater bronchodilator effect and is useful in the treatment of asthma.
It was revealed last month that the four-time Tour de France champion had returned a urine sample at the Vuelta a Espana in September containing twice the allowed concentration of asthma drug salbutamol
. The 32-year-old Team Sky star maintains he did not exceed the permitted dosage - the equivalent of eight puffs on an inhaler within 12 hours - but must now explain to the International Cycling Union (UCI) how this finding happened.
For children <2 years old (n = 37), a total volume of 1 ml was used, comprising 0.1 ml of salbutamol
inhalation solution and 0.9 ml of saline.
Froome is under scrutiny after a test during his La Vuelta win in September showed elevated levels of the asthma drug salbutamol
, which could result in an anti-doping rule violation and a ban.