A 30-year-old woman is brought to the emergency department at 2 pm by her husband. He is worried that she has taken some tablets in an attempt to harm herself. She has a history suggestive of depression since the birth of her son 3 months earlier. She has been having some counselling since that time but has not been on any medication. The previous evening about 10 pm, she told her husband that she was going to take some pills and locked herself in the bathroom.

Two hours later he persuaded her to come out, and she said that she had not taken anything. They went to bed, but he has brought her now because she has complained of little nausea, and he is worried that she might have taken something when she was in the bathroom. The only tablets in the house were aspirin, paracetamol and temazepam, which he takes occasionally for insomnia. She complains of little nausea, although she has not…