You could respond to your classmate with a supportive and informative comment that acknowledges their summary of drug administration methods. Here's an example of what you could say:
"Great job summarizing the different methods of drug administration! It's really important to understand how each method works and when it's appropriate to use them. I appreciate how you highlighted not just the modes of administration, but also some specific examples, like insulin for subcutaneous administration and the use of intravenous methods in emergencies.
One thing I'd like to add is the significance of absorption rates; for example, while intravenous administration provides immediate effects, oral administration may take longer due to the need for the digestive system to process the medication. Understanding these differences can help us better understand how to manage treatments effectively. Thanks for sharing your insights!"
Feel free to adjust the content based on your own thoughts or specific points you'd like to make!