One medical doctor says Democratic presidential nominee Hillary Clinton’s use of the blood thinner drug Coumadin is troubling, saying it is “NEVER prescribed to normal, healthy patients.”

Dr. Milton Wolf said via Twitter that he was highly concerned with Hillary’s health, explaining that the blood thinner is not a typical drug, but one that is used on patients who have serious medical conditions.

https://twitter.com/MiltonWolfMD/status/775326872649338880

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Wolf also said it was troubling that the former Secretary of State’s recent diagnosis of pneumonia, which was covered up by her campaign for two days, does not explain her collapse in public which was caught on camera.

https://twitter.com/MiltonWolfMD/status/775112225174396928

He also noted Clinton’s actions were not a “‘faint’ or a ‘stumble.’

“Dehydration/pneumonia does not cause rigidity and spasticity,” according to Wolf.

https://twitter.com/MiltonWolfMD/status/775326598690058244

But this observation was perhaps the most disturbing:

https://twitter.com/MiltonWolfMD/status/774979284016345088

“Stroke until proven otherwise,” he wrote.