According to Russian UN envoy Vitaly Churkin, WADA's system for allowing athletes to obtain Therepeutic Use Exemptions (TUE) to take otherwise banned products for medical reasons is "hypocritical" when compared with their strong stance against alleged state-sponsored doping in Russia.

"Such situation can be hardly accepted as the one in compliance with justice, equal approach and fair game," the diplomat was quoted as saying by the TASS news agency.

"We propose to discuss this situation in the United Nations."

He claimed that the international anti-doping system must promote transparency and the "indisputable equality" of all athletes.

"On the whole, it is necessary to work out unified requirements of doping control," he added. 

"Not only athletes, but the public society must have access to the information regarding doping tests.

"It is high time to clear out whether everything is so fine beyond the Russian borders.

"In this regard, it is inadmissible to ignore the information, which the international sports society recently learnt, that anti-doping bodies were giving secret consent for the use of strong drugs to athletes, who had been winning major tournaments in recent years and earning tens of millions of dollars.

"All statements that such athletes were suffering from grave diseases contradict common sense."

Confidential WADA medical information relating to the granting of TUEs was released by the Russian-linked Fancy Bears hacking group earlier this year.

Information relating to many athletes - particularly those in countries most critical of Russia, like the United States and Great Britain - has been published.

None of the athletes implicated have broken any rules, and anti-doping officials claim it is a case of "false equivalence" for Russia to compare this to the alleged doping in their own country.

This includes claims that samples of up to 15 medal winners at the Sochi 2014 Winter Olympic and Paralympic Games were illegally tampered with.

WADA have also claimed some of the files published have been artificially doctored.

But others outside Russia have also expressed concerns about the TUE system.

Among them was International Judo Federation President Marius Vizer, who told insidethegames last week that athletes using TUEs should not be able to compete until the effects have worn off.

Russian officials have previously called on the UN to intervene and overrule the International Paralympic Committee's decision to ban the country from Rio 2016 due to the doping allegations.

This has not yet proved successful, however.

It comes before the release of the WADA-commissioned McLaren Report on Friday (December 9) at which more evidence is set to be disclosed.