Methods and compositions for sleep disorders and other disorders

A pharmaceutical composition in oral unit dose form comprising an amount of 10 mg or less of a Compound of Formula I:

• wherein X is O, —NH or —N(CH3);
• and Y is —O— or —C(O)—, in free or pharmaceutically acceptable salt form, in combination or association with a pharmaceutically acceptable diluent or carrier, provided that in the case of a salt, the weight is calculated as the free base, where the amount of the Compound of Formula I:
• a) is sufficient to block the 5-HT2A receptor;
• and
• b) either does not block, or minimally blocks the dopamine D2 receptor.