The Russian has also been granted wildcards into Madrid and Rome, both tournaments she has won in the past, but at the time of writing it has yet to be decided whether she will be afforded one at next month's French Open or at Wimbledon in July.
This was a medication the Russian had been taking when it was within the rules but which was later reclassified as a prohibited drug.
Because of her status in the game, being a multiple Grand Slam champion and a former world number one, among other achievements, Sharapova can receive as many wildcards as needed as she mounts her comeback.
Rafael Nadal began his quest for a 10th title in the principality but was also made to work hard by Murray's compatriot Kyle Edmund - winning 6-0 5-7 6-3.
Maria Sharapova says that she does not fear a backlash as she prepares to return from a doping ban.
Maria Sharapova insists she has spent no time worrying over criticism from her fellow professionals surrounding her return to the WTA Tour.
She went on to criticise anti-doping boss Stuart Miller, who she claims failed to inform her that meldonium had been outlawed in tennis.
"He didn't want to know anything about it", she told Stern having also criticised the ITF last week in an interview with The Times.
"I take responsibility for my part, but there are other people who could have taken action".
The 23-times Grand Slam champion has not played since the Australian Open in January, in which she defeated Venus Williams in the final while eight months pregnant, as was revealed when the news of her pregnancy was confirmed by her publicist, Kelly Bush Novak.
The 35-year-old world No. 2, who is engaged to Reddit co-founder Alexis Ohanian, posted a photo on Snapchat with the caption: "20 weeks". They have been dating since 2015. "He's incredibly -a really nice person", Serena had said. "Really, really nice to see".
Sharapova started playing tennis when she was extremely young, turning pro when she was just 14.