It can also be used at lower doses (around 10mg/day) to treat insomnia.
It should not be given, except if based on clinical need and under strict medical supervision, to people younger than 18 years old, as it can increase the risk of suicide attempts and suicidal thinking, and it can increase aggressiveness.
While there is no evidence that it can harm a fetus from animal models, there are no data showing it safe for pregnant women to take.
People with severe liver disease should not take mianserin, and it should be used with caution for people with epilepsy or who are at risk for seizures, as it can lower the threshold for seizures. If based on clinical decision, normal precautions should be exercised and the dosages of mianserin and any concurrent therapy kept under review and adjusted as needed.
Very common (incidence>10%) adverse effects include constipation, dry mouth, and drowsiness at the beginning of treatment.
Common (1%<incidence≤10%) adverse effects include drowsiness during maintenance therapy, tremor, headache, dizziness, vertigo, and weakness.
Uncommon (0.1%<incidence≤1%) adverse effects include weight gain.
Mianserin is a tetracyclic piperazinoazepine; mirtazapine was developed by the same team of organic chemists and differs via addition of a nitrogen atom in one of the rings. (S)-(+)-Mianserin is approximately 200–300 times more active than its enantiomer (R)-(−)-mianserin; hence, the activity of mianserin lies in the (S)-(+) isomer.
It was developed but not discovered by Organon International; the first patents were issued in The Netherlands in 1967, and it was launched in France in 1979 under the brand name Athymil, and soon thereafter in the UK as Norval. Investigators conducting clinical trials in the US submitted fraudulent data, and it was never approved in the US.: 21 : 318
Mianserin was one of the first antidepressants to reach the UK market that was less dangerous than the tricyclic antidepressants in overdose; as of 2012 it was not prescribed much in the UK.
Mianserin is marketed in many countries mainly under the brand name Tolvon. It is also available throughout the world under a variety of other brand names including Athymil, Bonserin, Bolvidon, Deprevon, Lantanon, Lerivon, Miansan, Serelan, Tetramide, and Tolvin among others.
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