Generic name: Terbutaline
Brethine treats or prevents muscle spasms or muscle contraction symptoms around bronchioles (air tubes) due to emphysema bronchitis, or asthma. It may also be used by your physician to treat certain other conditions.
It refers to bronchodilators. It relaxes muscles around the air tubes (bronchioles), thus widening them. This promotes easier flow of air into and out of lungs.