RTTR - Ritter up 21% on advancement of lactose intolerance candidate RP-G28 May, 07 2019 12:45 PM Ritter Pharmaceuticals Nano cap Ritter Pharmaceuticals (RTTR +20.7%) is up on more than a 6x surge in volume. Shares have rallied 40% this week.More news on: Ritter Pharmaceuticals, Inc., Healthcare stocks news, Stocks on the move, Read more ...