Hydroxyzine (/haÉªËdrÉksáµ»ziËn/) is a first-generation antihistamine of the diphenylmethane and piperazine class. It was first synthesized by Union Chimique Belge in 1956 and was marketed by Pfizer in the United States later the same year, and is still in widespread use today.
One common cause of muscle aches and pain is fibromyalgia, a condition that causes tenderness in your muscles and surrounding soft tissue, sleep difficulties, fatigue, and headaches. The most common causes of muscle aches and pains are: Injury or trauma, including sprains and strains.
Causes of Extreme Fatigue. The Most Common Reasons for Excessive Fatigue. Discovering the causes of extreme fatigue can be difficult if you don't know the distinctions between fatigue and sleepiness. Some disorders cause fatigue, others sleepiness, and some disorders cause a mix of these two. The question is: Are you tired, sleepy, or fatigue? In this page you will learn: 1  What is extreme fatigue, compared to sleepiness and tiredness, 2  What causes extreme fatigue, including most common disorders and medication, 3  Useful questionnaire to test your excessive fatigue, 4  How to stop fatigue in a sleep apnea patient.