A metallic taste in your mouth after eating is a sign of a food allergy. Although most food allergies cause mild to moderate reactions, a metallic taste in your mouth might be a sign of a severe allergic reaction.

Methadone is a synthetic narcotic used to relieve moderate to serious pain or as an aid to heroin withdrawal. Also known as Diskets, Dolophine and Methadose, this controlled substance requires a prescription and comes in liquid, tablet and injectable forms.

Herbal remedies may improve the health and function of your organs, including your liver and spleen. The National Cancer Institute states that an organ is a part of your body that performs a specific task or function.

According to MedlinePlus.com, the average adult takes about 8 to 16 breaths each minute. Air enters your body through your nose and travels down your bronchial tubes and into your lungs. Phlegm works with your respiratory system, interacting with the air you breathe.

According to The National Institute on Drug Abuse, six million Americans 12 years old and older tried cocaine in 2006 and 1.5 million had used crack cocaine at least once in the past year. One of the most addictive drugs, cocaine gives users a euphoric feeling and makes them more energetic.

Anxiety developed from the natural process of fight or flight. Anxiety used to tell us when a situation became dangerous, and it increased our abilities to fight off the danger or reduce it by getting away.

Seizures, abnormal electrical activity that temporarily disrupts brain function, can cause symptoms as severe as convulsions or as mild as a brief moment of altered consciousness.

While there are plenty of jokes about male libido, low sexual function can be a cause of immense emotional distress for men. Problems with libido and erectile function can be caused by stress, illness and some medications. An herbal supplement may help improve libido for better sexual performance and satisfaction.

Irritable bowel syndrome, or IBS, symptoms often seem worse upon waking, at least to patients affected by the disorder. According to gastroenterologist Chung Owyang, chief of gastroenterology for the University of Michigan Health System, in the 2008 edition of "Harrison's Principles of Internal Medicine,"

Skin thinning is one predictable consequence of aging. As people age, their bodies produce less of the components that support skin health and development. But aging is not the only cause of thinning skin, and MayoClinic.

In Traditional Chinese Medicine, the herbal remedy he shou wu (sometimes known as fo ti) is prescribed to enhance general health and increase life span, but its claim to fame is that it also is said to return gray hair to its original color. The direct English translation of he shou wu is "Black-haired Mr. He."

Tinnitus is a term that describes ringing in the ears. Usually it occurs in both ears and is only perceptible to the person experiencing the ringing. In rare cases, however, tinnitus goes along with other conditions that may be the cause of the ringing.