Meclofenoxate (INN, BAN; brand name Lucidril, also known as centrophenoxine) is a cholinergic nootropic used as a dietary supplement.

In elderly patients, meclofenoxate has been shown to improve performance on certain memory tests.

[citation needed] It is sold in Japan and some European countries, such as Germany, Hungary, and Austria, as a prescription drug.

However, possible side effects may include, rarely, insomnia, dizziness, restlessness, muscle tremor, depression, nausea, muscle tension, and headache; these side effects may be due to overdosage and may indicate the need for the dosage to be reduced.

[6][7] In addition to Lucidril, meclofenoxate has also been marketed under the brand names Amipolen, Analux, Brenal, Cellative, Centrophenoxin, Cerebron, Cerutil, Closete, Helfergin, Lucidryl, Lutiaron, Marucotol, Proserout, Proseryl, and Ropoxyl.