A more thorough explanation:

A designer drug is a synthetic substance that is created to mimic the effects of an existing drug or to produce new effects. These drugs are often created in underground labs and are not regulated by the government.

• Ecstasy (MDMA) - a designer drug that was created to mimic the effects of amphetamines and hallucinogens.
• Bath Salts - a designer drug that contains synthetic cathinones, which produce effects similar to cocaine and amphetamines.

These examples illustrate how designer drugs are created to mimic the effects of existing drugs or to produce new effects. They are often marketed as legal alternatives to illegal drugs, but can be dangerous and have unpredictable effects on the body.

A design patent is a type of patent that protects the ornamental design of a functional item. This means that the patent holder has the exclusive right to use, sell, and manufacture the design for a certain period of time.

A design review is a process by which a building permit is not issued until the proposed building meets the architectural standards established by land-use regulations. This is also known as architectural review.