Though, Caffeine is said to be functioning like amphetamine and modifies the activities of the brain, yet caffeine works slower than amphetamine and the person consuming caffeine gets gradually ill. Initially the caffeine user exhibits symptoms of ADHD and gradually develops other symptoms like anxiety, schizophrenia, OCD, bipolar disorder, mania or even depression.

Caffeine is believed to be poisonous and its regular consumption may develop chronic poisoning besides, leading the person to cause the alergy – hypersensitivity to caffeine. However, the caffeine is considered to have some typical allergic symptoms while damaging the brain and some other organs in the body.

The people allergic to caffeine or their doctors often don’t know that the person is sick of caffeine which in turn, leads him to go further sick. The person then gets puzzled, bewildered and unable of remembering things. Suspicion, panic or resentment may be some of the symptoms of brain ailment.