They result in different sorts of stress, affecting different chemicals, maybe.

Modafinil and armodafinil work by affecting chemicals in the brain.

Maprotiline affects chemicals in the brain that may become unbalanced and cause depression.

It affects chemicals in the brain that may become unbalanced.

Pregabalin also affects chemicals in the brain that send pain signals across the nervous system.

It is thought to work by affecting certain chemicals in the brain that control the sleep/wake cycle.

It affects chemicals in your brain that may become unbalanced and cause sleep problems (insomnia).

There are pills that help reduce cravings by affecting chemicals in the brain.

It also affects chemicals in the brain which transmit messages from one cell to another.

It is thought that areca affects chemicals in the brain and other parts of the central nervous system.