How the dreams in A Midsummer Night's Dream influence Helena and demetrius?

In A Midsummer Night's Dream, the dreams influence Helena and Demetrius by causing turmoil in their romantic relationships. After Puck's mistake with the love potion, Demetrius falls in love with Helena, and this creates confusion and jealousy between them. The dreams serve as a catalyst for the comedy and chaos that ensues in the play.