Playing doctors at the chemist

'Could I have some of those one-a-night sleep tablets, please?' 'You mean the sleep aid?' replied the assistant in the Tesco Pharmacy. I agreed that was the product I wanted, only to be then asked when I'd last taken them. Having said it was a few months ago - the annoying fact of insomnia strikes from time-to-time. The assistant scanned the pack and then finished by reminding me 'not to take them before driving'. 'No', I replied: 'I tend not to do that when I'm getting into bed' - like it says on the front of the pack.