I noticed that my generic sinemet was not lasting as long as it should. Usually I have 2.5 hours of on time for my 25/100 carbidopa/levadopa pill manufactured by Lemmon. Now, I find that 25/100 pill of carbo/levo manufactured by Teva (or Tevo) only gives me 2 hours of on time. Called pharmacies and could not find any carbidopa/levadpoda manufactured by Lemmon. Was there a merger? Did Lemmon go out of business? Has anyone else experienced a change in their on time after a switch of manufacturers? Thank you for your responses.