Aspirin raises blood pressure?

Does aspirin raise blood pressure?
Potential health benefits and research finds 2007

Regular use of popular painkillers such as aspirin and ibuprofen increases the risk of
heart disease in men by raising blood pressure, a research suggests.

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Dr John Forman of Brigham from Women's Hospital in Boston
looked at 16,000 men, checking records over a four-year
period and he found that men who take painkillers most days a
week are a third more likely to be diagnosed with high blood
pressure.

According to the study, men who took acetaminophen
(paracetamol, or Tylenol), six or seven days a week were 34
percent more likely to be diagnosed with high blood pressure
than non-users.

Men who took aspirin that regularly were 26 percent more likely
to have high blood pressure than men who did not take
analgesics. While the increased risk for ibuprofen and
naproxen was 38 percent.

Is it a cause-effect relationship or just a correlation?

Looked at another way, perhaps those men who suffer from
high blood pressure are more likely to take or feel the need to
take painkillers. Which came first, the high blood pressure or
the taking of painkillers? Scientists have actually done some
experiments on this issues:

Aspirin lowers blood pressure at bedtime.

Reference Update 1-Common painkillers raise blood pressure-study Reuters
Feb 26, 2007