This article is from the Depression FAQ, by Cynthia Frazier with numerous contributions by others.
There are many techniques to help an antidepressant work more completely. The simplest is to increase the dose until relief is experienced or side- effects are severe. If the dose can not be increased, lithium can be added to any antidepressant to augment its effect. With all antidepressants it is possible to add small doses of stimulants such as pemoline (Cylert), methylphenidate (Ritalin), or dextroamphetamine (Dexedrine) to augment the antidepressant effect. Selective serotonin re-uptake inhibitors often work better when small doses of desipramine (Norpramin) or nortriptyline (Aventyl and Pamelor) are co-administered. Thyroid hormones (Synthroid or Cytomel) may be used to augment any antidepressant. At times combinations of these techniques may be utilized.