- Last edited on October 10, 2023
Tapering/Switching Antipsychotics
Primer
Antipsychotics may be tapered or switched due to clinical reasons. There are no published controlled trials on switching antipsychotics, guidelines therefore are only an aid and not necessarily supported by evidence. The risk of antipsychotic discontinuation is significant in primary psychotic disorders (See: Antipsychotics - Length of Treatment)
Withdrawal-Emergent Dyskinesia
- Withdrawal-emergent dyskinesia (W-ED) are moderate abnormal movements have been reported to occur from antipsychotic withdrawal in persons without a history of persistent tardive dyskinesia.[1][2] This phenonemon is not well studied, and some studies have found an incidence of up to 30% of individuals that discontinue antipsychotics.
- W-ED typically occurs within 4 to 6 weeks of antipsychotic discontinuation, and resolves within 1 to 3 months of onset.[3] Short-term management includes watchful waiting with reassurance in mild cases, while short-term symptomatic treatment includes clonazepam or reintroduction of the same antipsychotic, followed by more gradual taper or cross-taper.
Withdrawal Symptoms
Antipsychotic withdrawal symptoms may include nausea and vomiting, abdominal pain, diarrhea, headache, tachycardia, vertigo, increased perspiration, dry mucous membranes, myalgia, restlessness, anxiety, tension, insomnia, and hyperkinesia.[4]
Taper/Switch Strategies
See also:
Several jurisdictions and organizations have published recommendations on how to switch/taper antipsychotics.
Literature/Guidelines
Dopamine Supersensitivity Psychosis
See main article: Neuroleptic-Induced Dopamine Supersensitivity Psychosis (DSP)
Resources
Guidelines
Food For Thought
References
1)
Schultz, S. K., Miller, D. D., Arndt, S., Ziebell, S., Gupta, S., & Andreasen, N. C. (1995). Withdrawal-emergent dyskinesia in patients with schizophrenia during antipsychotic discontinuation. Biological psychiatry, 38(11), 713-719.
2)
Moseley, C. N., Simpson-Khanna, H. A., Catalano, G., & Catalano, M. C. (2013). Covert dyskinesia associated with aripiprazole: a case report and review of the literature. Clinical neuropharmacology, 36(4), 128-130.
3)
Karaş, H., Güdük, M., & Saatcioğlu, Ö. (2016). Withdrawal-emergent dyskinesia and supersensitivity psychosis due to olanzapine use. Nöro Psikiyatri Arşivi, 53(2), 178.