Dizziness is the most common side effect. Other side effects include:
- Agitation
- Digestive distress
- Fast heart rate
- Fatigue
- Headache
- Nausea
- Skin outbreaks
- Sweating
- Trouble breathing
- Trouble sleeping Don't use hawthorn if you are pregnant or breastfeeding, as little is known about its safety in these cases. Always talk to your doctor before you try any supplement, even if it's "natural."