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The atypical antipsychotics (AAP), also known as second generation antipsychotics (SGAs) and serotonin–dopamine antagonists (SDAs), [1] [2] are a group of antipsychotic drugs (antipsychotic drugs in general are also known as tranquilizers and neuroleptics, although the latter is usually reserved for the typical antipsychotics) largely introduced after the 1970s and used to treat psychiatric ...
There is a risk of developing a serious condition called tardive dyskinesia as a side effect of antipsychotics, including typical antipsychotics. The risk of developing tardive dyskinesia after chronic typical antipsychotic usage varies on several factors, such as age and gender, as well as the specific antipsychotic used.
Note: "Notable" is to mean side-effects that are particularly unique to the antipsychotic drug in question. For example, clozapine is notorious for its ability to cause agranulocytosis. If data on the propensity of a particular drug to cause a particular AE is unavailable an estimation is substituted based on the pharmacologic profile of the drug.
Very common (>10% incidence) adverse effects include: Somnolence † (produces an intermediate degree of sedation compared to other atypical antipsychotics [4]) Akathisia † Fasting glucose increased † Nausea † Parkinsonism † Insomnia † † These are dose-dependent.
The drug regulates behaviour and thoughts, and can also exhibit an anti-depressive effect. [3] [8] The side effect profile is similar to related antipsychotic agents, displaying weight gain, mental distress, and inability to sit still. Other possible symptoms include anticholinergic side effects such as insomnia, blurred vision, and dry mouth.
Common side effects include movement problems, sleepiness, dry mouth, low blood pressure upon standing, and increased weight. [6] Serious side effects may include the potentially permanent movement disorder tardive dyskinesia , neuroleptic malignant syndrome , severe lowering of the seizure threshold , and low white blood cell levels . [ 6 ]
Common adverse effects of olanzapine, occurring from 1–10%, include: Gynecomastia [8] Extrapyramidal symptoms (EPS) (dose-dependent). Tends to produce less extrapyramidal side effects than typical antipsychotics but more extrapyramidal side effects than sertindole, clozapine and quetiapine. [9] [10]