Mianserin hydrochloride is a tetracyclic antidepressant, that was previously used widely to treat depression. It is still used in some parts of the world, but it has been largely replaced by other antidepressants, such as mirtazapine, which is considered to have a similar effect but with fewer side effects.
Mianserin hydrochloride works by affecting a number of different chemicals in the brain, including serotonin, norepinephrine, and histamine. It is not entirely clear how it works to improve mood, but it is thought to help by increasing the levels of these chemicals in the brain.
Mianserin hydrochloride can cause a number of side effects, including drowsiness, dry mouth, constipation, dizziness, and weight gain. It can also lower blood pressure, so it is not suitable for people with certain medical conditions.