I have bipolar and have been taking creatine for lifting without any serious side effects for a long time now. It all has to do with how you take a supplement. If you take 5 grams a day along with 64 ounces of water than there is no reason to have any negative effects. But if you abuse the product and take 20 to 30 grams a day without drinking enough water than of course you're definitely gonna experience those serious side effects in which you are talking about. JMO.
There are psychiatric journals that show tentative reports that creatine may be of help in depression but as its a supplement used for weight lifting that has serious side effects of its own it would not be a good idea to try it but they are researching its helpful effects as they are with other compounds to find out what receptors it works on to develop medications from eventually.