Exhibit 16 [ Letterhead of Grant Thornton LLP ] April 16, 1998 Securities and Exchange Commission Washington, DC 20549 Re: Lannett Company, Inc. File No. 0-9036 Dear Sir or Madam: We have read Item 4 of the Form 8-K of Lannett Company, Inc. dated April 16, 1998, and agree with the statements contained therein. Very truly yours, /s/ Grant Thornton LLP