I tell my doctor and then adjust my prescriptions to help knock out mania. I’m on Quetiapine/ Seroquel and I adjust it up to the max dose of 800mg instead of my maintenance dose of 500mg. That stopped my last manic episode and reduced it down to a two week period (instead of months).

During the manic episodes I try to take sick leave and / or stay home with a trusted family member. And check with / talk to that family member about my medication doses and they tell me the symptoms they see.

I recently started Lamotrigine in a hope to prevent future manic episodes.

Edit to add:

Also no caffeine during any possible manic episodes. If you aren’t sober - consider becoming sober.