Passionflower is likely safe for most individuals when taken in recommended amounts for up to 2 months. Reported side effects include dizziness, drowsiness, confusion, nausea, vomiting, low blood pressure, irregular heart rhythm, and muscle incoordination.
Passionflower can cause drowsiness. Do not drive or perform any activies requiring mental alertness if passionflower affects you this way.
See your doctor if your symptoms persist (for longer than 3 weeks) or worsen when taking passionflower.
Avoiding using passionflower during pregnancy, as it may cause premature contractions. There is not enough evidence on its use during breast-feeding. Consult a health care provider if you are thinking of taking passionflower while pregnant or breast-feeding.
Stop taking passionflower at least 2 weeks before surgeries.
Do not use passionflower if you:
- are allergic to passionflower or any other plant in the family of Passifloraceae
- are pregnant
Passionflower may interact with the following medications:
- agents with sedativesedativean agent that induces sleep, relaxes, and reduces tension effects
- anticoagulants (e.g., warfarin)
- antiplatelets (e.g., clopidogrel)
- ASA (e.g., Aspirin®)
- ginkgo biloba
- medications that can lower blood pressure
- monoamine oxidase inhibitors (e.g., phenelzine)
- nonsteroidal anti-inflammatory drugs or NSAIDs (e.g., ibuprofen, naproxen)
- saw palmetto
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.