PMID- 36120781 OWN - NLM STAT- MEDLINE DCOM- 20230403 LR - 20230403 IS - 1875-8908 (Electronic) IS - 1387-2877 (Print) IS - 1387-2877 (Linking) VI - 90 IP - 1 DP - 2022 TI - Comparison of Steady-State Pharmacokinetics of Donepezil Transdermal Delivery System with Oral Donepezil. PG - 161-172 LID - 10.3233/JAD-220530 [doi] AB - BACKGROUND: Donepezil is approved for treatment of dementia of the Alzheimer type and is currently available only in tablet forms in the United States. OBJECTIVE: To compare steady-state pharmacokinetics of once-weekly 10-mg/d and 5-mg/d Corplex donepezil transdermal delivery systems (TDS) with once-daily 10-mg oral donepezil. METHODS: Open-label, randomized, crossover study (NCT04617782) enrolled healthy participants aged 18-55 years. All participants received 5-mg/d donepezil TDS during the 5-week Period 1, followed by 10-mg/d TDS or 10-mg/d oral donepezil in the 5-week Period 2; treatments were switched in Period 3. Bioequivalence was assessed at steady state on Week 5. RESULTS: All 60 enrolled participants received 5-mg/d TDS, 55 received 10-mg/d TDS, and 56 received oral donepezil. Adjusted geometric mean ratio (% [90% CI]) for maximum plasma concentration and area under the plasma concentration versus time curve (0-168 h) were 88.7 (81.7-96.2) and 108.6 (100.5-117.4) for 10-mg/d and 86.1 (79.8-92.9) and 105.3 (97.6-113.6) for dose-normalized 5-mg/d TDS and were generally within the 80% -125% range for establishing bioequivalence with oral donepezil. Skin adhesion was similar for both TDSs (>80% of patches remaining >/=75% adhered throughout the wear period). Overall incidence of adverse events (AEs) was similar across treatments. Compared with 10-mg/d TDS, oral donepezil was associated with higher incidence of gastrointestinal and nervous system AEs (14.5% versus 53.6% and 14.5% versus 30.4%, respectively). CONCLUSION: Donepezil TDSs are bioequivalent to oral donepezil at steady state and have a safety profile that supports their use in treating dementia of the Alzheimer type. FAU - Tariot, Pierre N AU - Tariot PN AD - Banner Alzheimer's Institute, Phoenix, AZ, USA. FAU - Braeckman, Rene AU - Braeckman R AD - KemPharm, Inc., Celebration, FL, USA. FAU - Oh, Charles AU - Oh C AD - Corium Inc., Grand Rapids, MI, USA. LA - eng SI - ClinicalTrials.gov/NCT04617782 PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - J Alzheimers Dis JT - Journal of Alzheimer's disease : JAD JID - 9814863 RN - 8SSC91326P (Donepezil) SB - IM MH - Adolescent MH - Adult MH - Humans MH - Middle Aged MH - Young Adult MH - *Alzheimer Disease/drug therapy MH - Cross-Over Studies MH - *Donepezil/adverse effects/pharmacokinetics PMC - PMC9661317 OTO - NOTNLM OT - Alzheimer type dementia OT - Alzheimer's disease OT - bioequivalence OT - donepezil OT - transdermal patch COIS- Authors' disclosures available online (https://www.j-alz.com/manuscript-disclosures/22-0530r1). EDAT- 2022/09/20 06:00 MHDA- 2022/11/02 06:00 PMCR- 2022/11/14 CRDT- 2022/09/19 04:48 PHST- 2022/09/20 06:00 [pubmed] PHST- 2022/11/02 06:00 [medline] PHST- 2022/09/19 04:48 [entrez] PHST- 2022/11/14 00:00 [pmc-release] AID - JAD220530 [pii] AID - 10.3233/JAD-220530 [doi] PST - ppublish SO - J Alzheimers Dis. 2022;90(1):161-172. doi: 10.3233/JAD-220530.