The fundamental problem is there are few choices of medication for effectively managing bipolar depression. One article states, "Given the failure of almost all modern trials of antidepressants in bipolar disorder to demonstrate efficacy, and the limited efficacy of mood stabilisers in the depressive phase of the disorder, this is a major unmet need." I never knew we were so hosed.
State-of-the-science
A 2010 comprehensive review of clinical trials and other data was performed to assess NAC effectiveness. The review's tepid conclusion: "bipolar disorder treatment outcomes may potentially be improved by additional use of [NAC] with conventional [psych meds]." They also urged caution when interpreting the large effects of several isolated studies, as they have not yet been replicated in larger trials. Okay, so now what.
One article studied NAC efficacy as an add-on for maintenance medication. The authors studied bipolar individuals with moderate depression. Results showed a "robust [drop] in depression scores with NAC treatment." That sounds better.
In another study, NAC was given to 75 depressed bipolar patients at 1 gm twice a day in combination along with their usual bipolar medications. The results showed a significant improvement in mood, global functioning (whatever that is), and social/occupational functioning.
How it works
NAC is a precursor of glutathione and works to replenish depleted sources of glutathione in the brain. Low glutathione levels in specific brain areas are linked to mood disorders, particularly schizophrenia and bipolar disorder.
Anything else?
Finally, in regards to risk one journal article concludes: "While dosages, pharmacological strategies (monotherapy versus augmentation), and long-term risks are not fully evident, NAC appears to be a promising, relatively low-risk intervention." I can live with that.
Conclusion: Go for it!
The supplement appears safe at the oral doses given in the studies. And according to Ms. Tracy's blog post NAC is inexpensive at $25 per month and readily available over-the-counter!
Now, how should I go about doing this? First, I will get buy-in from my mental health team - which consists of my parents, psychiatrist, and a few close friends.
This should be straightforward forward, I hope.
And I need to decide if I'm going to stay at 15 mg/day Abilify (recently reduced from 30 mg/day) or try and get off it completely. I'm leaning towards just getting off the stuff. I haven't noticed anything negative since the reduction a couple of weeks ago.
What about the dose? Well, one study administered a dose of 1 mg of NAC twice per day on moderately depressed bipolar individuals. I would say I'm mostly moderately depressed so I'll just use that dosage.
So, I'll check-in with my mental health team, dump the Abilify, and start taking NAC. Stay tuned!
Anybody else take supplements for bipolar depression?
DISCLAIMER: I am not a trained mental health professional. This post is my opinion only. Do not change or adjust your medications without first consulting your psychiatrist or other mental health professional.