All bipolar meds have side effects. Some are permanent, some come and go and some disappear once blood levels of the drug are stabilized
I had fatigue (like my eyes were closing all by themselves in the middle of the day
), hand tremor, overall shakiness and a weird metallic taste in my mouth, like I was chewing on a penny. After two months the side effects were gone. Nowadays I can tell if my lithium levels are getting too high because I start tasting pennies again.
You might want to hang in there, maybe raise the dosage slower and then wait until your Li level has stabilized. There'll be a "breaking in" period with every med you try. But it's up to you. Most pdocs are very aware that the drugs they prescribe can cause distressing side effects. Most are very understanding and willing to work with you to find the right medication for you. Good luck ~~~