Benztropine is also used to treat and prevent these symptoms when they are caused by drugs such as chlorpromazine (Thorazine), fluphenazine (Prolixin), perphenazine (Trilafon), and others. Benztropine may also be used for purposes not listed in this medication guide.
As days go past the freshness reduces. In general, the fresher your keg draft beer is, the better it tastes. Keg beer will remain fresh if dispensing with CO2, while maintaining the proper temperature and pressure: For non-pasteurized draft beer about 45-60 days. For pasteurized draft beer about 90-120 days. When dispensing keg beer with a party pump (air), any draft beer will remain fresh for no more than 8-12 hours.
Once you have your gas plan, attach your keg to the carbon dioxide tank adjusted to the pressure dictated by your gas table and wait. A batch of homebrew is small and the headspace pressure will equilibrate with the beer in about 3 days. The only thing you can do to speed this method up is to periodically shake the keg.