Which statement about diazepam for sedation is NOT TRUE?

The statement that is NOT TRUE regarding diazepam for sedation is that patients commonly complain of post-operative headaches. While headaches can occur for various reasons after a procedure, they are not a well-documented common side effect specifically associated with diazepam sedation. In fact, diazepam primarily serves as a sedative and anxiolytic, and although it may contribute to general discomfort post-operatively, headache is not a direct or frequent consequence of its use.

In contrast, the other statements regarding diazepam are accurate. Acceptable anxiolytic action is indeed usually achieved approximately one hour before a procedure, providing adequate time for the drug to take effect. Additionally, diazepam does exhibit profound amnesic properties, which can lead to side effects such as drowsiness or cognitive impairment following its use. Lastly, the presence of active metabolites from diazepam can indeed prolong sedation effects, lasting several hours post-operatively, sometimes up to 8 hours, depending on the individual's metabolism and dosage. This knowledge is crucial for healthcare providers when considering the timing and dosing of diazepam for sedation in a clinical setting.