look at picture?presentation

Look at this picture! These is drugs. The brand is "Panadol" "Panadol Long Lasting" twelve pieces are packed, I will concentrate on three key areas for introduce now.
看這幅圖畫,這些都是藥,它的牌子名"必理痛" 全名是長效 twelve 粒裝,我現在分三個區域作介紹,,Whether or wrong in English part???Thanks for help me..


Lastly, Panadol Long Lasting twelve pieces are packed say again, It relieve back and muscle pain quickly. It work up to eight hours. It can be taken on an empty stomach. It will not cause depenence..I have saying finshed, thank you.
這段都是炒回來,不作解釋,我只想問頭一句,說回這隻藥,"說回"用 "say again" 可以嗎?是放在後面嗎?Also, efficacy ,用了四個 " It "It 什麼..It 什麼..好像有點怪,有什麼方法可以改動, 改動..謝謝