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			 The Briton also chided his own racket manufacturer Head after the 
			company said it would continue to support Sharapova in the wake of 
			her admission that she had taken the banned substance. 
			 
			"It's not up to me to decide the punishment, but if you're taking 
			performance enhancing drugs and you fail a drugs test, you have to 
			get suspended," Murray told reporters at the Indian Wells tournament 
			in Palm Springs on Thursday. 
			 
			"If you're taking a prescription drug and you're not using it for 
			what that drug was meant for, then you don't need it, so you're just 
			using it for the performance enhancing benefits that drug is giving 
			you. And I don't think that that's right." 
			 
			The drug, produced in Latvia but unavailable for purchase in the 
			United States where Sharapova is based, was only added to the World 
			Anti-Doping Agency (WADA) list of banned substances in January, 
			shortly before her positive test at the Australian Open. 
			
			  
			Manufactured for people suffering from heart problems, it can also 
			increase blood flow and improve exercise capacity. 
			 
			Sharapova, who will be provisionally suspended by the International 
			Tennis Federation from this weekend and faces up to a four-year ban, 
			told a news conference in Los Angeles on Monday that she had been 
			taking the drug for 10 years. 
			 
			She said she was first given it by a family doctor after she 
			frequently became sick, had irregular electrocardiogram results, a 
			magnesium deficiency and a family history of diabetes. 
			 
			"I read that 55 athletes have failed tests for that substance since 
			January 1," said Murray. 
			 
			
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			"You just don't expect high-level athletes at the top of many 
			different sports to have heart conditions." 
			 
			The highest-paid woman in sports, Sharapova has already lost support 
			from some sponsors, with Swiss watchmaker TAG Heuer cutting ties 
			this week, while Nike and Porsche have distanced themselves from 
			her. 
			 
			Murray said Head's announcement that it had extended its contract 
			with the five-times grand slam champion was "a strange stance" given 
			the events of the last few days. 
			 
			"I don't really know what else to say on that, but that's not 
			something I believe," he added. 
			 
			"I think at this stage it's important really to get hold of the 
			facts and let things play out, like more information coming out 
			before making a decision to extend the contract like that, in my 
			view. I personally wouldn't have responded like that." 
			 
			(Reporting by Andrew Both in Cary, North Carolina; Editing by Ian 
			Ransom) 
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			reserved.] 
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