Meldonium was added to the World Anti-Doping Agency list of banned substances at the start of 2016 after mounting evidence that it boosted blood flow and enhanced performance.
"Why didn't someone come up to me and have a private conversation, just an official to an athlete, which would have taken care of the confidentiality problem they talked about later?" the 29-year-old said in an interview with The Times.
Sharapova did, however, say that she had become "complacent" and was responsible for failing the drug test.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
"Ultimately the fault was mine," she added. "I had been getting clearance on everything I was taking for seven years and I became complacent."
Sharapova is due to return to competitive action at the Stuttgart Grand Prix which starts on April 24.
(Reporting by Hardik Vyas in Bengaluru; Editing by Ken Ferris)
