st: Working with complex strings

["Dudekula, Anwar" <dudekulaan@upmc.edu>]

Dear Stata List Reader, 

I am working with deidentified hospitaldatabase with patient names(as string variable) and medications (as string variable)as follows 

Patients_name		medication
------------------------------------
Patient-1			metoprolol 100 mg qday
Patient-1			metoprolol tatrate 150mg bid
Patient-1			atenelol 150 mg qday 
Patient-2			hctz 25 mg qday 
Patient-2 			PEG interferon 
Patient-3 			cimzia 50 mg qday 

Question: I am interested in name of medication only , not their dosages.Is it possible to split  the medication string  after the name  i.e., 

1) split  metoprolol tatrate 150mg bid into  metoprolol tatrate  &  150mg bid
2) split  metoprolol 100 mg qday into   metoprolol   &   100 mg qday

Thank you, 
Yours Sincerely,
Anwar 


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/