Fumitory vinegar
Vinegar is a good solvent for an alkaloid-rich plant such as fumitory. You will need a quantity of dried fumitory.
Choose a clean glass bottle of the size appropriate to your needs, and stuff with the dried plant. Then fill up with white wine or apple cider vinegar. Leave to macerate in a sunny place for a week, then strain off into another bottle.
This vinegar should retain its potency for a year.
Take 1 tablespoonful in the morning for any liver or gallbladder problem.
A fumitory tea will have similar properties, though the bitterness is less moderated as compared to the vinegar.