Hillary Clinton 'Fit to Serve as President,' Doctor Says

— -- Hillary Clinton’s doctor says she has no lasting effects from a concussion she suffered while serving as secretary of state in 2012, backing up statements that she has made in the years since the incident.

A statement released today by Clinton’s doctor detailing her current and past health record says the Democratic presidential candidate had follow-up testing from the injury that revealed a "complete resolution of the effects of the concussion.”

As a “precaution,” however, Clinton, 67, has continued to take a daily blood thinner, according to a letter from Clinton's doctor, Lisa Bardack, an internist and the Chairman of the Department of Medicine at the Mount Kisco Medical Group in Mount Kisco, New York.

Ill and dehydrated while suffering from a stomach virus in December 2012, Clinton fainted and fell at her home, sustaining a concussion, her spokesman and doctors announced at the time. After a follow-up exam revealed a blood clot in her head, requiring blood thinners and another hospital stay, Clinton returned work Jan. 7, 2013.

Last year, Clinton told ABC News’ Diane Sawyer has not experienced any sustained after-effects from the concussion.

“No lingering effects,” Clinton told Sawyer, when asked whether she had experienced any.

“No,” Clinton affirmed, when asked whether she still notices effects of any kind.

The concussion forced Clinton to wear glasses to treat double vision in the months following the incident.

In the statement, Bardack also notes that Clinton “does not use illicit drugs or tobacco products.” Bardack has been Clinton’s personal physician since 2001.

Clinton does, however, exercise regularly, including yoga, swimming, walking and weight training.

“She is excellent physical condition and fit to serve as President of the United States,” Bardack notes.