Drug Interaction Report

Talk to your doctor before using lorcaserin together with vardenafil. Combining these medications may increase the risk of priapism, which is a prolonged and painful erection unrelated to sexual activity. You should immediately discontinue these medications and seek emergency medical attention if you have an erection lasting longer than 4 hours. If not treated promptly, priapism can cause irreversible damage to the penile tissue. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Grapefruit juice may increase the blood levels of certain medications such as vardenafil. You may want to limit your consumption of grapefruit and grapefruit juice during treatment with vardenafil. However, if you have been regularly consuming grapefruit or grapefruit juice with the medication, then it is advisable for you to talk with your doctor before changing the amounts of these products in your diet, as this may alter the effects of your medication. Contact your doctor if your condition changes or you experience increased side effects. Orange juice is not expected to interact.

Information for this minor interaction is available on the professional version.