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The effects of acute treatment with paroxetine, amitriptyline, and placebo on the equilibrium function in healthy subjects: a double-blind crossover trial. 2014

Seiko Miyata, and Akiko Noda, and Kunihiro Iwamoto, and Masahiro Takahashi, and Yuki Hara, and Jun Kojima, and Tetsuya Iidaka, and Norio Ozaki
Department of Biomedical Sciences, Chubu University , Kasugai , Japan.

OBJECTIVE Depression is common in old age, and is treatable with antidepressants. However, antidepressants use can increase the risk of falls. Thus, we assessed the effects of antidepressants on equilibrium function using posturography. METHODS This study recruited 10 healthy male volunteers (35.3 ± 3.7 years). In this double-blinded, three-way crossover trial, they received acute doses of 10 mg paroxetine, 25 mg amitriptyline, and placebo. They were administered posturography at baseline and 4-h postdosing. RESULTS At 4-h postdosing, amitriptyline significantly decreased the locus length per unit area (L/A) and increased the envelope area compared with those at baseline. Meanwhile, the total length and the locus length per time (L/T) at 4-h postdosing of amitriptyline did not show significant differences from those at baseline. After paroxetine treatment, there were no significant differences in total length, L/T, L/A, and the envelope area between baseline and 4-h postdosing. CONCLUSIONS An acute dose of amitriptyline significantly decreased L/A and increased the envelope area as markers of body sway. Evaluation of equilibrium function is important for preventing the potential risk of falls and body sway after taking antidepressants.

UI MeSH Term Description Entries
D008297 Male Males
D010919 Placebos Any dummy medication or treatment. Although placebos originally were medicinal preparations having no specific pharmacological activity against a targeted condition, the concept has been extended to include treatments or procedures, especially those administered to control groups in clinical trials in order to provide baseline measurements for the experimental protocol. Sham Treatment
D003936 Diagnosis, Computer-Assisted Application of computer programs designed to assist the physician in solving a diagnostic problem. Computer-Assisted Diagnosis,Computer Assisted Diagnosis,Computer-Assisted Diagnoses,Diagnoses, Computer-Assisted,Diagnosis, Computer Assisted
D004311 Double-Blind Method A method of studying a drug or procedure in which both the subjects and investigators are kept unaware of who is actually getting which specific treatment. Double-Masked Study,Double-Blind Study,Double-Masked Method,Double Blind Method,Double Blind Study,Double Masked Method,Double Masked Study,Double-Blind Methods,Double-Blind Studies,Double-Masked Methods,Double-Masked Studies,Method, Double-Blind,Method, Double-Masked,Methods, Double-Blind,Methods, Double-Masked,Studies, Double-Blind,Studies, Double-Masked,Study, Double-Blind,Study, Double-Masked
D004856 Postural Balance A POSTURE in which an ideal body mass distribution is achieved. Postural balance provides the body carriage stability and conditions for normal functions in stationary position or in movement, such as sitting, standing, or walking. Postural Control,Posture Balance,Posture Control,Posture Equilibrium,Balance, Postural,Musculoskeletal Equilibrium,Postural Equilibrium,Balance, Posture,Control, Postural,Control, Posture,Equilibrium, Musculoskeletal,Equilibrium, Postural,Equilibrium, Posture,Postural Controls,Posture Balances,Posture Controls,Posture Equilibriums
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000058 Accidental Falls Falls due to slipping or tripping which may result in injury. Falls, Accidental,Falling,Falls,Slip and Fall,Accidental Fall,Fall and Slip,Fall, Accidental
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000639 Amitriptyline Tricyclic antidepressant with anticholinergic and sedative properties. It appears to prevent the re-uptake of norepinephrine and serotonin at nerve terminals, thus potentiating the action of these neurotransmitters. Amitriptyline also appears to antagonize cholinergic and alpha-1 adrenergic responses to bioactive amines. Amineurin,Amitrip,Amitriptylin Beta,Amitriptylin Desitin,Amitriptylin RPh,Amitriptylin-Neuraxpharm,Amitriptyline Hydrochloride,Amitrol,Anapsique,Apo-Amitriptyline,Damilen,Domical,Elavil,Endep,Laroxyl,Lentizol,Novoprotect,Saroten,Sarotex,Syneudon,Triptafen,Tryptanol,Tryptine,Tryptizol,Amitriptylin Neuraxpharm,Apo Amitriptyline,Desitin, Amitriptylin,RPh, Amitriptylin
D000704 Analysis of Variance A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable. ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses

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