Bipolar disorder.  The manic highs and depressive lows of bipolar disorder can be devastating, but treatment may even them out.
D000928:Antidepressive Agents / Q000627:therapeutic use; D014150:Antipsychotic Agents / Q000627:therapeutic use; D001714:Bipolar Disorder / Q000175:diagnosis / Q000523:psychology* / Q000628:therapy*; D006801:Humans; D018020:Lithium Compounds / Q000627:therapeutic use; D010353:Patient Education as Topic
D000928:Antidepressive Agents; D014150:Antipsychotic Agents; D018020:Lithium Compounds