Eden Apothecary · Herb Profile
Lactuca virosa
Pronounced Wild Lettuce: WYLD LET-iss. Lactuca virosa: lak-TOO-kah vih-ROH-sah.
Cool, dry, and quieting: a bitter sedative latex that cools heat, relaxes spasm, and stills an over-excited, over-firing nervous system and an irritable cough.
Avoid. Modern consumer safety references (WebMD and the NCCIH-aligned literature) advise avoiding wild lettuce during pregnancy, and adequate human safety data are lacking for this central-nervous-system-active, mildly anticholinergic herb. No specific AHPA Botanical Safety Handbook class rating was located, so avoidance is precautionary and follows Mills and Bone principles for CNS-active botanicals. Sources: WebMD wild lettuce monograph; Mills and Bone, Principles and Practice of Phytotherapy.
Avoid. No lactation safety data exist, and sedative, CNS-active constituents may reach the nursing infant; modern references advise avoiding wild lettuce while breastfeeding. Sources: WebMD wild lettuce monograph; NIH LactMed lists no entry, so avoidance is precautionary.
Avoid in infants and young children; not for pediatric self-use. The herb has a narrow margin and is a CNS depressant, and the youngest patient in the documented 2009 toxicity series was 12 years old. Use in adolescents only under qualified professional supervision. Sources: Besharat, Besharat and Jabbari, BMJ Case Reports 2009 (youngest case age 12); WebMD.
Narrow therapeutic margin: this is a practitioner-dosed herb, not for casual self-dosing. It is a genuine central nervous system depressant and in overdose produces an anticholinergic-like toxidrome, dilated pupils and blurred vision, light sensitivity, dry mouth, urinary retention and reduced bowel sounds, agitation, hallucinations, sympathetic overactivity, sweating, flushing, rapid heartbeat, dizziness, and stupor (documented in a 2009 case series of eight people, ages 12 to 38, who ate the raw plant). Despite the folk name lettuce-opium, it contains no opiates and is far weaker than opium. Causes drowsiness: do not drive or operate machinery after dosing. As an Asteraceae-family plant it can provoke allergy or contact dermatitis in sensitive people. Correct botanical identity matters, as it is easily confused with prickly lettuce (Lactuca serriola) and other wild lettuces.
Avoid in pregnancy, lactation, and young children (see safety fields). Do not combine with alcohol or sedative, hypnotic, or other central nervous system depressant drugs. Discontinue at least one to two weeks before elective surgery because of additive central nervous system depression with anesthesia. Caution in known Asteraceae allergy, and, given the reported anticholinergic-type effects, caution in narrow-angle glaucoma, prostatic enlargement (BPH), or a tendency to urinary retention. Not for anyone whose work requires alertness while dosing.
Lactuca virosa is a common, weedy biennial, widely naturalized across Europe and beyond and easily cultivated from seed. It is not at risk and is not on the United Plant Savers list. The main stewardship concern is correct identification and honest labeling, since it is frequently confused or substituted with prickly lettuce (Lactuca serriola); harvest the latex and leaf sustainably as the plant flowers, and source verifiably identified material.
A leading botanical candidate for the biblical bitter herbs (maror) eaten with the Passover lamb (Exodus 12:8; Numbers 9:11). The Mishnah (Pesachim 2:6) names chazeret (lettuce) among the acceptable bitter herbs, and bitter wild lettuce is a principal candidate, though the precise species identity is debated. The plant and its soporific latex were also known to the ancient Mediterranean world: Dioscorides (De Materia Medica, Book 2) and Pliny (Natural History) describe wild lettuce and the sleep-inducing, opium-like quality of its milky sap.
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