Chamomile interactions have been reported with warfarin and some liver-metabolized medicines. Sedative effects may be additive, and preliminary research raises possible concerns with oral contraceptives and hormone-sensitive conditions.

Use with caution. Healthcare professional review recommended before use.

Contraindications

Known allergy to ragweed, chrysanthemums, marigolds, daisies, or related plants

Cautions

Severe allergic reactions, including anaphylaxis, have occurred.
Hormone-sensitive conditions deserve caution because chamomile may have estrogen-like effects.
Pregnancy and breastfeeding safety are not established.

Drug Interactions

Drug Class / Substrate	Mechanism	Severity	Source
Warfarin	An interaction has been reported, creating a possible bleeding risk.	Major	NCCIH Chamomile
Sedatives	Chamomile may add to drowsiness or other sedative effects.	Moderate	NCCIH Chamomile
Liver-metabolized medicines	Interactions with some drugs processed by the liver have been reported, but the affected classes are not fully defined.	Uncertain	NCCIH Chamomile
Oral contraceptives	Preliminary evidence suggests chamomile's estrogen-like effects might reduce contraceptive effects.	Uncertain	NCCIH Herb-Drug Interactions

This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before using herbal medicines, especially if you take prescription medications.