What is the fine-grained topic of the following text: If your quick-relief inhaler does not seem to work as well, if you need to use more than usual of your quick-relief inhaler for 2 or more days in a row, or if you need to use more than one full canister of your quick-relief inhaler over a 2-month period, seek immediate medical attention. Only return the topic.
Ineffectiveness of quick-relief inhaler and when to seek medical attention