Development of a pharmacological evidence-based anticholinergic burden scale for medications commonly used in older adults
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Yamada, Shizuo
[1
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Mochizuki, Masae
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Univ Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, JapanUniv Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
Mochizuki, Masae
[1
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Chimoto, Junko
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Univ Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, JapanUniv Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
Chimoto, Junko
[1
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Futokoro, Risa
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Mukogawa Womens Univ, Sch Pharm & Pharmaceut Sci, Nishinomiya, JapanUniv Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
Futokoro, Risa
[2
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Kagota, Satomi
[2
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Shinozuka, Kazumasa
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Mukogawa Womens Univ, Sch Pharm & Pharmaceut Sci, Nishinomiya, JapanUniv Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
Shinozuka, Kazumasa
[2
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[1] Univ Shizuoka, Ctr Pharm Food Res CPFR, Grad Sch Pharmaceut Sci, 52-1 Yada,Suruga Ku, Shizuoka 4228526, Japan
Aim: The present study aimed to develop a pharmacological evidence-based anticholinergic burden scale (ABS) through a direct assessment of muscarinic receptor-binding activities of 260 medications commonly used in older adults. Methods: The muscarinic receptor-binding activities of 260 drugs were assessed by the displacement of specific [N-methyl-H-3]scopolamine methyl chloride binding in the rat brain. The maximum blood concentrations (C-max) of drugs after their administration to subjects were cited from their interview forms. Results: In total, 96 of 260 drugs displayed concentration-dependent muscarinic receptor binding in rat brain. Based on muscarinic receptor-binding activity (IC50) and C-max after the administration at clinical doses in humans, we rated ABS 3 (strong) for 33 drugs and ABS 2 (moderate) for 37 drugs. There was an approximate similarity between muscarinic receptor-binding activities (IC50) and C-max of 33 drugs (ABS 3) after their administration at clinical doses in humans. Furthermore, 26 drugs were defined as ABS 1 (weak) by muscarinic receptor-binding activity. The remaining 164 drugs exhibited slight or no significant muscarinic receptor-binding activities at high concentration of 100 mu M, and they were defined as ABS 0. There was a marked similarity for 28 drugs (ABS 3) between the present ABS data and their previous scoring data in the literature. Conclusions: To our knowledge, the present study developed the first comprehensive pharmacological evidence-based ABS of drugs based on muscarinic receptor-binding activity, which provides guidance as to which drugs may be discontinued to reduce anticholinergic burden.