Using the traffic tool Alexa as a rough estimator, MarkMonitor found that pharmacies included in Alexa's top 100, 000 sites--about a third of the pharmacy sites the researchers traced--now each receive about 99, 000 visitors daily, more than triple the 32, 000 daily visitors per ranked site last year.

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Last spring the NABP developed the Verified Internet Pharmacy Practice Sites program to certify Internet pharmacy practices through additional licensing and inspection criteria.

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Vet-VIPPS stands for Veterinary-Verified Internet Pharmacy Practice Sites, a program run by the National Association of Boards of Pharmacy.

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Only two of the 3, 000 or so pharmacies studied were certified by the National Association of Boards of Pharmacy as "trusted" sites.

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Last year drug giant Eli Lilly enlisted the National Association of Boards of Pharmacy to take a look at Web sites that purported to sell "generic" versions of Lilly drugs.

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Consider using sites that are accredited through the Internet Verified Internet Pharmacy Practice Program (VIPPS), sponsored by the National Association of Boards of Pharmacy.

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Though most of those 3, 000 sites claimed certification as legitimate pharmacies, only four actually had credentials from the National Association of Boards of Pharmacy.

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