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.
â¢ Emotional Stressors. Physical stress factors include all those things that cause stress on the body. So chronic pain or illness, including allergies, can be a stress factor. Lack of sleep is one of the most common causes of stress on the body, as is poor nutrition. Being subjected to too much noise or overcrowded conditions can often produce stress. And then, of course, the many and varied substances we put into our bodies can cause physical stress.