Amy McLean and The Perks Editorial Team

Hydralazine is in a class of medications called vasodilators. Doctors may prescribe it for hypertension or high blood pressure. While it helps lower blood pressure, hydralazine can actually increase heart rate.

Knowing what to do for an asthma attack without an inhaler can be crucial. You can take several steps while waiting for your symptoms to subside or for medical attention to arrive.