A theme is the central idea found within a story or passage. It can also represent a message or lesson the author wants to convey. Themes are considered universal when they are easily relatable by a wide audience. A story can have more than one theme. To unlock this lesson you must be a Study.com Member.
Active ingredient in Tylenol vs Advil. The active ingredient in Advil is ibuprofen, which is a non-steroidal anti-inflammatory drug. On the other hand, the active ingredient in Tylenol is acetaminophen (also known as paracetamol), an analgesic and an antipyretic agent.
Active ingredients are the substances in drugs that are responsible for the beneficial health effects experienced by consumers. The active ingredient in a pharmaceutical drug is called an active pharmaceutical ingredient (API). An example of an API is the acetaminophen contained in a pain relief tablet. The active ingredient in a biological drug is called a bulk process intermediate (BPI).