Calendula can interact with some medications. It increases the effects of sedativesedativean agent that induces sleep, relaxes, and reduces tension medications including benzodiazepines (e.g., lorazepam, clonazepam), barbiturates (e.g., phenobarbital, thiopental), and opiates (e.g., morphine, methadone, oxycodone). If you are taking any of these medications, talk to your doctor before taking calendula.
You should avoid using calendula if you are allergic to plants of the asteraceae/compositae/daisy family (e.g., chrysanthemums [mums], ragweed, marigolds, daisies).
If your symptoms persist or worsen after taking calendula, you should consult your health care provider.
You should stop using calendula at least 2 weeks before a surgery as it may increase the effects of different surgery medications.
Do not use calendula if you are pregnant or breast-feeding. Consult your health care professional if you have any questions.
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.