Methods of treating depression and other related diseases

1. A method for treating major depressive disorder in a patient in need thereof, comprising administering to said patient a 1 mg/kg to about 10 mg/kg dose of a compound represented by:

or pharmaceutically acceptable salts, homologs, or hydrates thereof.

2. The method of claim 1 , comprising administering the dose every week or every two weeks to said patient.

3. The method of claim 1 , wherein administration of a single dose is effective for up to 4 days.

4. The method of claim 1 , further comprising administering another antidepressant drug.