Well Let's look at what happened during that time that they did not wake from:
Window and shutters having been open for an hour on a cold night,
The door slamming shut,
Curtains blowing into the room,
Their mother frantically opening and closing wardrobes and cupboards
Their mother rushing out screaming for help,
The entire Tapas 7 group searching throughout the apartment,
Kate and the Tapas group shouting Madeleine’s name outside,
Gerry McCann’s closing and opening the shutters multiple times
Mrs Webster’s similarly attempting to open the shutters but failing,
The Police investigating the scene,
Gerry’s “roaring like a lion” and then prostrating himself on the floor,
Both parents repeating this action and wailing
Kate’s checking the twins for vital signs,
The twins being lifted from their cots by people not their parents, and
Their being carried out into the cold night air, and to another apartment.
Then you have statements from Kate and Fiona and the others saying they thought they had been drugged.
Now given Kate's and Fiona's medical experience you would think they would be familiar with the Ramsey Sedation Scale which is defined as:
The Ramsay Sedation Scale (RSS) was the first scale to be defined for sedated patients and was designed as a test of rousability. The RSS scores sedation at six different levels, according to how rousable the patient is. It is an intuitively obvious scale and therefore lends itself to universal use, not only in the ICU, but wherever sedative drugs or narcotics are given. It can be added to the pain score and be considered the sixth vital sign.
Ramsay Sedation Scale
1 Patient is anxious and agitated or restless, or both
2 Patient is cooperative, oriented and tranquil
3 Patient responds to commands only
4 Patient exhibits brisk response to light glabellar tap or loud auditory stimulus
5 Patient exhibits a sluggish response to light glabellar tap or loud auditory stimulus
6 Patient exhibits no response
Now clearly the twins were at stage 6, why did they not demand as doctors that the twins were immediately taken to hopsital?