At the pre-wedding feast, Adina and Dulcamara entertain the guests with a song. Adina wonders why Nemorino isn’t there. She doesn’t want to sign the marriage contract until he appears. Meanwhile, Nemorino asks Dulcamara for another bottle of the elixir. Since he doesn’t have any money left, the doctor agrees to wait so Nemorino can borrow the cash. Belcore is bewildered that Adina has postponed the wedding. When Nemorino tells him that he needs money right away, the sergeant persuades him to join the army and receive a volunteer bonus. Nemorino buys more elixir and suddenly finds himself besieged by a group of women. Unaware of the news that his uncle has died and left him a fortune, he believes the elixir is finally taking effect. Adina feels responsible for Nemorino’s enlistment, but her concern turns to jealousy when she sees him with the other women. Dulcamara boasts about the power of his elixir and offers to sell Adina some, but she is determined to win Nemorino all on her own.

Nemorino now feels sure that Adina cares for him: He noticed a tear on her cheek when she saw him with the other women. Adina returns to tell Nemorino that she has bought back his enlistment papers. When he again feigns indifference, she finally confesses that she loves him. Belcore appears to find the two embracing and redirects his affections to Giannetta, declaring that thousands of women await him elsewhere. Dulcamara brags to the crowd that his miraculous potion can make people fall in love and even turn poor peasants into millionaires.

Synopsis by The Metropolitan Opera