Yes...happened to e once....very scary! Living alone..stupidly had no glucose near my bed...woke up very hypo....took abot 1/2 an hour to make it downstairs...had to crawl and hold the walls...ate a choccy bar (all I could reach in the fridge, as I couldn't stand to get o the cupboard) and then....well, nothing for about 1/2 an hour. Not sure whether I manages to cling onto consciosness while I made it downstairs and then gave up exhausted, but yes, if the glucose is in your system, it will raise your bg level.