PCT No. PCT/FR98/01100 Sec. 371 Date Mar. 27, 2000 Sec. 102(e) Date Mar. 27, 2000 PCT Filed Jun. 2, 1998 PCT Pub. No. WO99/00119 PCT Pub. Date Jan. 7, 1999The invention relates to the use of a specific 5HT2 receptor antagonist for the preparation of medicines useful in the treatment of the sleep apnea syndrome.