Beside the abovementioned factors that leave you without a good night rest, medical experts claim that certain drugs can also cause insomnia including: antihistamines, pain medications, heart medications and blood pressure medications. For instance, some of them make you drowsy, but in more severe cases, they can also cause stomach problems. As a result, you will have to spend half of the night in bathroom and you won’t be able to rest. The worst part is that we cannot function properly without a good night sleep, because we need at least 8 hours of sleep in order to recharge our batteries. Sleeping is also extremely important for our overal health, for our body, mind and every vital function in the body. In order to finish our daily tasks without problems and to be more productive, we need to sleep more.