US FDA study of character-space-limited prescription drug communications finds consumers may be less likely to click on a link for more risk information if the promo already has substantial details.

Lilly recommended testing use of embedded Twitter cards to convey safety information and PhRMA proposed studying a universal graphic symbol or FDA's logo.

Flurry of new studies brings tally of FDA research projects on Rx drug promotion to 43; the 14 in progress and 7 pending peer review or recently published have a total cost of $15.5m.