I know it's related, as it's something I deal with nearly everyday.
I have had hypothyroidism every since I was three months old, and I was VERY lucky that it was diagnosed accurately back in Oct. 1973. As a result, I was put on Synthroid, and have been taking it ever since, and will continue to do so for the rest of my life. There are generic drugs My thyroid gland never functioned to begin with, and had it not been found, I would not be who I am today, in terms of physical and mental health. My Mom's cousin was believed to have the same disease, but in the 1950's in England (as with everwhere else back then) it was misdiagnosed, and he never develloped fully and died early, unfortunately. Great strides have been made since then, I wouldn't be surprised if they can detect it before babies are even born.
Although my TSH levels are within the acceptable range, I feel like I'm very susceptible to depression, and feel great at some times, really down in others, and certain situations can really affect it. This year has been hard for me, as I've been depressed a lot this year, except during my time in Europe in July...
Anyhow, I tried taking an anti-depressant but it gave me headaches and made my heart race, so I stopped it. On my own, I try to focus on small victories to prevent me from sliding down the slippery slope into short-term depression, before something lifts me back up.
Tbar: I would definitely suggest that the person you know find an endocrinologist in your area. Call the health insurance provider, and they can most likely recommend a specialist. Also, there's a myriad of books on the topic, "Thyroid Power" is a good one as well.
And the winner for best actress is....REESE WITHERSPOON for 'Walk the Line'!!!!!!!!