The last works well with studying! I always studied right before sleep and would even put my book under my pillow so my subconscious self would be 'reminded' of my studying. I regularly would wake up going over the details of the information.
This was our miracle cure last night! Alex didn't cough once after I have it to him. He has coughed once this morning. He told me "I am NOT doing that again", but after last night's results he will if I have to pour it down myself!