Aconitum firmum (Polish: tojad mocny, Czech: oměj tuhý, Ukrainian: Аконіт міцний, Romanized: Akonіt mіtzniy) is a species of monkshood that is found in Southern Poland, Slovakia, and Czechia, with a few instances in Ukraine and Romania.

[3] Like all monkshoods, Aconitum firmum is highly poisonous.

All parts of the plant, with the highest concentration being in the roots and seeds, contain aconitine, which is a potent nerve poison.

The species name firmum comes from the inflection of the Latin word firmus, meaning stable and firm.

[6] The Czech, Polish, and Ukrainian common names reflect on this and can be literally translated to "strong aconite".