anxiety
"1st prescribed "Valium" upon cancer diagnosis.  GP was concerned about my anxiety and especially my ability to sleep with this news.  He was right, sleep nearly impossible.  Pill worked for me, but initially took 10 mg (especially the first night) to have any effect.  I take half a 5mg (2.5 mg) occasionally for general insomnia (had for 10 years before cancer) and especially at night before surgeries/procedures, (8 in < 2 yrs). Afraid to take higher doses because I react poorly to medicines in general and problems with anesthesia the next day. Have to switch off with another medicine when this stops being effective."