Answer:
Money
Step-by-step explanation:
According to Romeo, it is money which is more poisonous than poison. He reflects on this when he finds out that Juliet is dead, and he wants to join her. Therefore, he goes to the apothecary and tries to buy poison. The apothecary does not want to sell it to him at first, but he really needs the money and ends up doing so. Romeo thinks of how much more damaging money is in the world, and how it is responsible for countless deaths.