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