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Akathisia is a common adverse effect of antipsychotics and, less commonly, antidepressants. Akathisia can cause great discomfort and is often described by the patient as a most distressing sensation; however, the condition is often underdiagnosed or misdiagnosed. In oncological settings, neuroleptics and antidepressants that induce akathisia are also administered. However, reports of akathisia in oncology settings are few and a case of akathisia in a bedridden patient has not been reported as far as we know.
A 72-year-old man with esophageal cancer who could not sit down or stand up was administered 5 mg/day haloperidol to relieve agitation as a symptom of major depressive disorder. Three days after the administration of haloperidol, the agitation had become worse. Careful observation revealed that the patient sometimes showed slight rubbing movement of the lower extremities and slight twisting movements of the body, which were not observed before the administration of haloperidol. The patient moved his body and lower extremities to relieve restlessness, which had developed after the administration of haloperidol. Although symptoms were atypical, akathisia was suspected and discontinuation of haloperidol resolved the symptoms.
Results and significance of results:
In patients with poor performance status, clues leading to the correct diagnosis of akathisia might be absent, which would not be the case in patients who were able to walk, stand up, or sit down. Careful observations of patients before and after the administration of drugs that may cause akathisia may be required to ensure correct diagnosis.
It has been reported that akathisia is a neurological side effect induced by antiemetic drugs and/or antipsychotics. Akathisia can occur in any area of the body, but respiratory akathisia is an unusual type of akathisia. Cases of respiratory akathisia in cancer patients taking antiemetic drugs have not previously been reported.
We report on a case of a cancer patient taking prochlorperazine as an antiemetic drug who experienced dyspnea accompanied by severe restlessness associated with respiration. By administration of biperiden, his restlessness in respiration and dyspnea promptly disappeared.
This finding led us to conclude that this cancer patient was experiencing respiratory akathisia.
Significance of results:
Respiratory akathisia is uncommon. It is important for cancer patients that dyspnea induced by disease progression be ruled out as a cause of the respiratory restlessness. It is necessary to consider the possibility of akathisia in patients that complain of vague anxiety, chest discomfort, or dyspnea following antipsychotic medication.
There is substantial evidence that tricyclic antidepressants are effective in the management of chronic pain, including cancer pain. In oncological settings, these agents are used as adjuvant analgesic drugs. However, cases of akathisia due to tricyclic antidepressants used as adjuvant analgesic therapy have not previously been reported.
Two cancer patients experiencing chronic pain who were refractory to nonsteroidal anti-inflammatory drugs and opioids were prescribed amoxapine as an adjuvant analgesic therapy for neuropathic pain. These patients developed inner restlessness and restless physical movements after amoxapine was prescribed. Although symptoms were atypical, akathisia was suspected and discontinuation of amoxapine resolved the symptoms.
Results and significance of results:
Akathisia should be considered in patients receiving adjuvant analgesic therapy with tricyclic antidepressants. Early detection and appropriate treatment will relieve this distressing symptom. Restless movements involving parts of the body other than the legs may be the clue to the diagnosis.
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