ANSWER:
The only "predictable" thing about a "drug" and how an "individual will respond to the drug" is that it is not predictable. This simply means that the manner in which a person responds to a drug is not known.
Step-by-step explanation:
- Also it is never known what kind of drug will an individual take. The reaction of the drug can be different for different people.
- When drug reaches the blood stream and other body parts, the response of these to the drug varies from person to person and so one does not know what the drug will do.