I take buspar (buspirone) and drank some water today with grapefruit slices not realizing that grapefruit is not recommended with buspar (buspirone). will this cause a probl?

Buspar (buspirone): The juice can slightly affect Buspar (buspirone) metabolism but overall not dangerous.

Not likely: Grapefruit juices may affect the way the body breaks down the Buspar leading to more Buspar in your body. One need not be overly concerned if a small amount was consumed only once; however it is recommended to avoid grapefruit and its juice during your treatment with Buspar moving forward. Things to watch for today will be fatigue and dizziness.