Whitney Houston In The Hospital From a Relapse?

Earlier this week it was reported that Whitney Houston was experiencing “drug related” issues that caused her to cancel shows:
It was allergies, not a relapse, says Whitney Houston, who’s now out of the hospital and eager to return to the stage. “I’m feeling great,” she tells PEOPLE exclusively. “I’m just ready to move on and continue my world tour.” Hospitalized earlier this week for an upper respiratory infection, Houston postponed the first four shows of her European tour, fueling tabloid speculation that she’s in a downward drug spiral. Houston calls such reports “ridiculous” and says, “At this point, I just don’t respond. I don’t even read it.” Checking into a hospital in Paris was doctor’s orders. “My health is terrific,” says the singer, 46. “But this is a time when I get a lot of allergies.”