* Metaphor
* Sense of disapproval/distaste. Vampiric, parasitic, dangerous, threatening, shows the fear of the medical equipment attached to the patiend
* However, M’s initial impression of harm is superseded as he realises unlike a vampire’s fang which is designed to drain blood, the needle is ‘not guzzling but giving’
* Harsh ‘g’ sound conveys sense of bitterness, guttural, he feels the medication is both intrusive and ineffective