Lilly Icos’ Cialis was identified as the pharmaceutical product site with the highest percent of visitors requesting a prescription after visiting, a new study says. Cialis was followed by Pfizer’s Viagra, AstraZeneca’s Nexium, Sepracor’s Lunesta and Sanofi-Aventis’ Allegra respectively, according to the results of the study conducted by market research firm Manhattan Research. The study, titled ePharma Consumer v6.0: The Future of Integrated DTC Marketing, provides data on over 100 pharmaceutical product sites and consumer actions as polled from 4,965 US adults. The Manhattan Research study further identified Sanofi-Aventis’ Ambien CR Web site as the top Rx product site driving prescription requests after visiting the site by prescription volume. Ambien CR was followed by Sanofi-Aventis’ Allegra, GlaxoSmithKline’s Wellbutrin XL, Sepracor’s Lunesta and AstraZeneca’s Lunesta respectively. Further details of the ePharma Consumer v6.0 study will be made available during a Webinar being offered by Manhattan Research today.