 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  shortness of breath caused by asthma. Controlling these symptoms can decrease time lost from work or school. Racepinephrine belongs to a class of drugs known as bronchodilators. It works by relaxing the muscles around the airways so that they open up and you can breathe more easily. Use this medication only if you have been told by your doctor that you have asthma. How to use S2 Racepinephrine 2.25 % Solution For Nebulization Beta-Adrenergic Agents Short-Acting (Inhaled) If you are using the over-the-counter product to self-treat, read all directions on the product package before using this medication. If you have any questions, consult your pharmacist. If your doctor has prescribed this medication, use it as directed. This product is used with a special breathing device (such as an atomizer or nebulizer) that changes the solution to a fine mist that you inhale. Do not swallow or inject the solution. Do not mix with other medicines in your breathing device. Learn all instructions for proper use of this medication and the device. Make sure you understand how to properly clean the device to prevent infections. If you have any questions, consult your doctor, pharmacist, </s>