After surveying 25 dermatologists that prescribe Valeant's products and are familiar with the specialty pharmacy Philidor, Deutsche Bank analyst Gregg Gilbert believes the Philidor controversy could have longer-lasting effects relative to the short-term disruption that Valeant management has suggested. The analyst awaits Valeant's guidance changes for Q4 and 2016 that are coming in December. The stock could have "significant upside" over the next year if Valeant delivers on its targets, Gilbert tells investors in a research note. Nonetheless, he keeps a Hold rating on the stock with a $136 price target. Shares of Valeant closed yesterday down $2.12 to $73.29.