Rumor: Did Winona Ryder Overdose on Airplane?

Did Winona Ryder pass out on an airplane from taking too many Xantax pills? That is what The Daily Mail is claiming, but It doesn't seem like they are basing their story on any facts. It seems more like they are going on a hunch than anything else. This is what they said:

"Winona Ryder looks distinctly ill at ease as she arrives at Los Angeles airport to board a plane to London.This picture of the actress in a wide-brimmed, cloche-type hat and sunglasses was taken just hours before she fell ill and sparked a mini mid-air emergency yesterday."

"The 37-year-old Girl, Interrupted star was rushed to hospital on arrival at Heathrow and an accidental overdose of tranquillisers was today believed to be the reason."

Normally the UK rags cite some mysterious source, but this time they didn't even do that. The Mail is saying Ryder is known to hate flying, and since her rep announced that she was O.K., but never revealed what her "mysterious illness" was, they expect it may be drugs.