From his book.
One of the police officers who went to the McCanns' home in England, reported that a medical monitoring chart for Madeleine was posted in the kitchen. This referred to her sleep problems and made clear that she was waking several times in the night. The paternal grandfather stated that Kate gave the little girl - and also the twins - Calpol, a medication designed to facilitate falling asleep. That seems to be a common practice in Great Britain; they even talk about a "Calpol generation." In recent years, the possible presence of an antihistamine with sedative effects in Calpol has aroused great controversy. Recently, the same laboratory put Calpol Night on the market, whose ingredients clearly list that it contains an antihistamine.
See how Amaral talks about the chart that Madeleine had for her sleeping. Then goes on to say that Kate give Madeleine Calpol.
If Kate give Madeleine Calpol to help her sleep [which it doesn't] then there would be no need for a chart.
The way he introduces the Calpol into the paragraph along side Madeleine and her sleep, sounds as though Kate give Madeleine Calpol to stop her waking up.
In actual fact the Grandfather [correct me if I am wrong] actually said he doesn't remember Kate giving Madeleine any drugs except for Calpol. I don't think he said 'at night to help her sleep' did he?