Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: F23 Respiratory Sinus ArrhythmiaHi, I was recently diagnosed with Respiratory Sinus Arrhythmia and prescribed an inhaler. I was only told to use "as needed" but I have been having trouble figuring out when "as needed" applies. Do I only use it when I feel like I'm having an onset attack? Or at night when I lay down to sleep and my symptoms seem more noticeable? Are both situations applicable? Also any advice on lifestyle changes to ease my symptoms? Thank you in advance.. ### Response: A "respiratory sinus arrhythmia" is an absolutely normal phenomenon and doesn't need to be treated, as it's normal. What was the inhaler prescribed for?.