Depending on what you're using the word for- you can say a drug is a medication, or you can say it's an illegal substance
homeostasis is very important because in the wrong body conditions certain processes (osmosis) and proteins (enzymes) will not function properly.
- eating healthy
- walking at least 20 minutes a day
- no cooking with oil
- no frying
- no fast foods
- no drugs
- no stressing
- no sleeping longer than 10 hours
- no staying up late
Lucid is best described "clear"