Hou Po San Wu Tang -- How long?

ES Female, 77 yo, 4/16 #10

She took Da Cheng Qi Tang for the first three days and then keep taking Hou Po San Wu Tang + Ban Xia Hou Po Tang + Gua Lou Xie Bai Ban Xia Tang until now for her constipation, abdomenal distension, plum pit Qi, feeling warm, thirst, acid regurgetation, unsmooth urgent urination in daytime, 2 or more times urination at night, and night sweating.  She is feeling very good now -- bowel movement everyday, throat feels better, acid regurgetation is better, no night sweating, urination is smooth and once at night, still feels warm, sometimes bouts of dry cough feeling her throat is closing up.  My question is if she can keep taking the Da Huang formula more than two months until she is going to see you in July.  Her pulse is not hasty anymore, the speed is normal, beat is regular, deep, left cun is sippery. 

Hiromi