That's why she asked for her children to be tested.
Only months later. There is absolutely no independent evidence that Kate mentioned her concerns to any police officer the night of the disappearance. Indeed for Kate to have done that Silvia Batista would have had to have forgotten to mention that she translated Kste's concerns to the police.
Fiona, while still referring to Kate being anxious enough to check the twins breathing, would have to have forgotten to mention that Kate had also tried desperately to get the GNR/PJ to do something about her children's unresponsive state.
Gerry would have to have ignored his wife's pleas.
At least one, and perhaps more, Portuguese police officers, no doubt with children of their own, would have to have ignored the very grave concerns that a mother had for the safety of her children and further fail to report those concerns in his statements. Wouldn't that have been inhuman ?
The McCanns, against all we know about them, would have to have failed to complain loudly that their two remaining children's lives had been put in jeopardy by the heartless Portuguese police.
But most damning of all, when the McCanns did, eventually, broach the subject of sedation with the FLOs they made absolutely no mention of the twins unresponsive state on the night of Madeleine's disappearance. Further they asked for no tests to be done, tests which could have been useful in catching the abductor of their daughter.
Isn't that one to many coincidences for you ( what is it Kate said about coincidences ? ) because it is for me.