Do you know if you're low or high on the therapeutic range? Once I first hit the therapeutic range I still needed several increases plus an antipsychotic to stop cycling. I'm at the top end now at 1500mg and feeling much better. I've been able to reduce my Seroquel from 200 to 50mg since leveling out.

If your dose can't be increased you may want to talk to your pdoc about adding or substituting another med.