When I first started I used the Microsoft Calendar and had each patient reoccurring every two months (actually I still use this method as a back up). you can then put notes under each patient as to what med came in etc.  I have a patient form that I use to obtain the basic information from the patient (name, address income info etc).  Another form for each drug they apply for (this form has the drug, company, Dr info, when application was sent in, received etc).