The number of attacks you have will depend on how severe your condition is. Some people have attacks once or twice a month, while others have them several times a week. Although panic attacks are frightening, they're not dangerous. An attack will not cause you any physical harm, and it's unlikely you'll be admitted to hospital if you have one. Be aware that most of these symptoms can also be symptoms of other conditions or problems, so you may not always be experiencing a panic attack. For example, you may have a racing heartbeat if you have very low blood pressure.