{HEAD ~ A therapeutically effective dose} refers to that amount of active ingredient, which ameliorates {TAIL ~ the symptoms} or condition 
{ HEAD ~ A therapeutically effective dose } refers to that amount of active ingredient , which ameliorates { TAIL ~ the symptoms } or condition
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH