| Article | Drug/Class | Study design | Sample size | Follow-up (months) | Withdrawal schedule |
| Ailabouni 2019 | Anticholinergic and sedating drugs | Before-and-after study | 46 | 6 | Individualised |
| Drimer 2004 | Biperiden | Before-and-after study | 27 | 0.3 (10 days) | Tapered over three days – one-third of initial dose withdrawn daily |
| Hanus 2017 | Anticholinergics | Before-and-after study | 59 | 1.5 | Trial discontinuation, dose reduction or alternative drug |
| McLarin 2016 | Anticholinergics | Before-and-after study | 814 | Not reported | Not described |
| Moga 2017 | Anticholinergics | RCT | 50 | 2 | Not described |
| Rojo-Sanchis 2017 | Anticholinergics, using STOPP/ START criteria | Before-and-after study | 67 | Until hospital discharge | Not described |
| Weichert 2018 | Anticholinergics using anticholinergic cognitive burden scale | Prospective cohort study | 549 | 1 | Not described |