Dosages (Cowslip) : - 1 - 2 g flower as tea 3 ×/day (APA; CAN; HH2); 2 - 4 g flower (KOM; PH2; PIP); 1 - 2 ml liquid flower extract (1:1 in 25% ethanol) 3 ×/day (APA; CAN); 2.5 - 7.5 g flower tincture (KOM; PIP); 0.5 - 1.5 g root (KOM; PIP); 0.2 - 0.5 g finely cut root (PH2); 1.5 - 3 g root tincture (KOM; PIP).
Contraindications, Interactions, and Side Effects (Cowslip) : - Class 1 (AHP). Occasional GI distress and nausea recorded (AHP). Hazards and/or side effects not known for proper therapeutic dosages (PH2). Commission E reports for flower, contraindications: hypersensitivity; adverse effects: GI disturbances (occasionally). For root, GI disturbances occasionally) (AEH; KOM). The Herbal PDR lists diarrhea, gastric discomfort, nausea, and queasiness as side effects of the root (PH2). CAN cautions the quinones are allergenic. May interfere with blood pressure therapy (CAN).
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