- Spike lavender
For Patients & Caregivers
Lavender may be helpful in the treatment of anxiety and depression. It may also improve breathing, relaxation, and sleep. In studies that use massage along with lavender aromatherapy, massage may be more responsible for some of the benefits.
Several studies suggest that lavender may reduce anxiety, depression, and pain, and improve sleep. In other studies where lavender is used with massage, benefits may be due to the massage, rather than the lavender itself.
Only a few studies have evaluated lavender for cancer and related symptoms. In the lab, lavender has several properties that may be helpful against cancer, but human studies are needed.
Lavender can cause allergic skin reactions and may increase sedative effects. It may also cause enlarged breasts in boys. Because it has weak hormonal activities, long-term oral or topical use of lavender should be avoided in patients with hormone-sensitive cancers.
Some oral lavender formulations have been shown to relieve anxiety. Animal studies suggest that inhaled lavender can either enhance calmness or increase nervousness, depending on whether the animal had calm or nervous personalities.
- Cancer treatment
Basic studies have identified some properties in lavender that may be helpful against cancer, but no studies have been conducted in humans. A compound called POH that may have come from lavender or other plants was developed as a nasal spray and showed some benefit in palliative care patients with recurrent gliomas.
- Cancer symptom control
Lavender did not reduce anxiety during radiation treatment. Two studies that used lavender aromatherapy along with massage did not find an increased benefit because of the use of lavender. A hospital that allowed the use of aromasticks found that lavender was among the most popular, did not disturb others, and improved breathing and relaxation. Because lavender has weak hormonal effects, long-term oral or topical use should be avoided in patients with hormonal cancers.
Several studies show that lavender can aid in the treatment of depression.
Several studies show that lavender can improve sleep. For one study of lavender aromatherapy with massage in cancer patients, the massage itself was thought to be responsible for the benefits.
One study showed that inhaling lavender oil may reduce migraine headaches.
A few studies show that lavender oil is effective in treating chronic pain, but the effects are not long-lasting. In two studies with children, inhaling lavender lowered heart rate and pain medication use. Other types of pain relieved with the use of lavender include patients in labor and those who have suffered burns.
One study showed inhaled lavender relieved menstrual cramps and emotional symptoms, but the effects did not last long.
- You are pregnant and nursing: Excessive internal use of lavender should be avoided.
- You are allergic to lavender: Skin rash has been reported.
- You have a hormone-sensitive cancer: In laboratory studies, lavender showed very weak estrogenic and antiandrogenic activities, and it is unclear whether this would lead to any positive or negative effects with long-term oral or topical use.
- You are taking sedatives or hypnotic drugs: Lavender may increase their effects.
- You are taking CNS depressants, anticonvulsants: Lavender may increase narcotic and sedative effects.
- You are taking cholesterol-lowering drugs (statins, nicotinic acid, fibric acid derivatives): Lavender may produce additional cholesterol-lowering effects.
- Oral: Nausea, belching, confusion
- Topical: Allergic skin reactions and sensitivity to sunlight
Although lavender appears to be well tolerated, it may have weak hormonal effects.
Excessive breast development in preteen boys with repeated application of lavender and tea tree oils, as well as perfumes with lavender as a main component.
For Healthcare Professionals
Derived from the flowering tops of the plant, lavender oil is used in lotions and perfumes, in aromatherapy, as a topical treatment, and as an oral supplement for a wide variety of symptoms.
Laboratory studies suggest that lavender has anxiolytic (30) (31), anticonvulsant (26) (34), neuroprotective (21) (32) (33), cardioprotective (35), antimicrobial (4) (27) (28), anti-inflammatory (22), and antioxidant (29) effects. Lavender oil inhalation reversed spatial memory loss in dementia models (23).
Lavender aromatherapy improved preoperative anxiety (68) (69), and decreased postoperative analgesics (45) and autonomic response to pain (46). It also reduced pain and anxiety in burn patients (70), and pain from labor (71) or renal colic (72). Other studies have found benefit with inhaled lavender to improve sleep quality (36), post-acute-stress memory and physiologic function (73), dysmenorrhea and emotional symptoms (37) (38), and menopause flushing (74). It reduced migraine frequency (19), and agitation and falls in older individuals (20). Inhaled lavender also improved dementia symptoms (5) (15), whereas dermally-applied lavender did not (39). In addition, it was not found to be effective for fatigue in hemodialysis patients (1).
In studies evaluating effects on cancer symptoms, inhaled lavender did not reduce anxiety during radiotherapy (6), or increase benefits of massage (8). In other studies of lavender used in aromatherapy massage, it is unclear whether or not the benefits weren’t fully attributable to massage (44) (52).
Lavender has demonstrated some activity in various cancer cell lines (47) (48) (49). Early animal studies of the monocyclic terpene perillyl alcohol (POH) derived from several herbs including lavender suggest tumor inhibition and regression (50) (51).
Anti-inflammatory and analgesic effects of lavender are attributed to the constituent 1,8-cineole (2). Other dominant constituents include linalool and linalyl acetate, which may relax blood vessels and induce anxiolytic effects (30) (40) (54).
Lavender oil has broad-spectrum antibacterial activity (22). It reversed bacterial resistance to piperacillin in multi-drug-resistant E.coli via alterations of outer membrane permeability and bacterial quorum sensing inhibition (27), and prevented immediate-type allergic reactions by inhibiting mast cell degranulation (25). Antimicrobial activity was synergistic or additive when combined with other essential oils, with the most favorable combinations being cinnamon or sweet orange oil against C. albicans and S. aureus, respectively (28).
Data indicate lavender has depressive effects on the central nervous system (3). In animal models, it displays neuroprotective effects by attenuating neuronal damage, upregulating catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) activities, and the glutathione (GSH)/glutathione disulfide (GSSG) ratio (21). Activity in stroke models include increased endogenous antioxidant defense, oxidative stress inhibition, and increased vascular endothelial growth factor (VEGF) expression (33). In an Alzheimer’s disease model, lavender extract improved spatial performance by diminishing beta-amyloid production in the hippocampus (32). In mice with anosmia, anxiolytic effects with lavender inhalation were likely due to serotonergic mechanisms rather than olfactory activation (30) (31). However, whether lavender alleviates or exacerbates anxiety may actually be determined by genetic influences on temperament, as these behaviors were respectively amplified after exposure to lavender inhalation in calm versus nervous sheep (56). Antiepileptic effects are due to suppression of nitric oxide level in the brain (26). Cardioprotective effects against myocardial infarction are attributed to its antioxidant properties (35). In wound healing models, lavender oil accelerates reepithelialization and wound closure via enhanced epidermal growth factor (EGF) secretion (55).
In young women with premenstrual syndrome, lavender inhalation increased the high frequency component of heart rate variability, reflecting parasympathetic nervous system activity (37). Although lavender reduced anxiety during urodynamic assessments by increasing c-aminobutyric acid inhibitory effects in the amygdala, blood pressure increases were attributed to potential diuretic activity (40). A positron emission tomography study revealed anxiolytic effects may occur via reduced serotonin-1A receptor binding (41). Effects on preoperative anxiety were attributed to both the use of lavender aroma as well as the placebo effect of added attention to patients (68).
Lavender has a high rate of antiradical activity among essential oils (58). An aqueous lavender extract inhibited lymphocyte proliferation in Hodgkin’s lymphoma cell lines via apoptosis (47). Lavender extracts and essential oil exhibit cytotoxicity to malignant cells, upregulate Bax expression, and induce PARP cleavage in HeLa cells, and cause a sub-G1 peak in treated cells compared with controls (48). Perillyl alcohol (POH) derived from botanicals including lavender, may affect transforming growth factor (TGF)-beta and/or Ras signaling pathways (59) and Na/K-ATPase inhibition (60).
Lavender oil has weak estrogenic and antiandrogenic activities that may alter estrogen and androgen signaling pathways (14).
Although lavender appears to be well tolerated, it may have weak hormonal effects (14).
Prepubertal gynecomastia (topical): With repeated application of lavender and tea tree oils (14). At the same time, there was considerable discourse as to whether or not other co-ingredients could have been the cause of enlarged breasts (62) (63) (64) (65). In 3 additional boys who were chronically exposed to lavender, two used a cologne, one of which was confirmed to contain lavender. Symptoms improved after the exposure was discontinued (53).
Sedatives: Lavender may potentiate their sleep-inducing effects (3).
CNS depressants, anticonvulsants: Lavender may increase narcotic and sedative effects (66).
Cholesterol-lowering drugs (statins, nicotinic acid, fibric acid derivatives): Lavender may produce additional cholesterol-lowering effects (61).