Complementary/Alternative Medicine: This monograph describes a natural or herbal product that is not subject to FDA guidelines for medicines. Patients and clinicians are advised to read package labels carefully to ensure safe and efficacious use.


Trade Name(s)

  • Rosmarinus officinalis
  • compass plant/weed
  • polar plant

Ther. Class.


hair regrowth stimulants

Common Uses

  • Alopecia areata.
  • Inducing abortion.


Essential oil has a spasmonthlytic effect on gastrointestinal smooth muscle, positive inotropic effect on heart, and increases coronary and menstrual blood flow. Topical use irritates the skin and increases blood circulation.

Therapeutic Effect(s):

  • Improved hair growth.
  • Menstrual flow stimulant.


Absorption: Unknown

Distribution: Unknown

Metabolism and Excretion: Unknown

Half-life: Unknown




Contraindicated in:

  • Hypersensitivity;
  • Pregnancy.

Use Cautiously in:

  • Lactation;
  • Seizure disorders;
  • Ingestion of undiluted essential oil can be toxic and cause significant adverse effects.

Adverse Reactions/Side Effects

CV: hypotension

CNS: seizures

Derm: contact dermatitis

GI: nausea, vomiting

GU: uterine bleeding

* CAPITALS indicate life-threatening.
Underline indicate most frequent.


Natural Drug Interaction

  • ↑risk of seizures with  drugs that lower seizure threshold.
  • ↑risk of bleeding with  antiplatelet agents or anticoagulants.




PO (Adults): 1–2 g of crude leaf/150 mL water ingested three times daily as tea .

Topical (Adults): 3 drops of rosemary oil (114 mg) in combination with other essential oils massage into scalp nightly for 2 minutes with a warm towel around head to increase absorption .


Oil: 6–10%

Crude leaf


  • Assess amount of alopecia prior to and periodically during therapy.

Lab Test Considerations:

Monitor blood sugar and serum electrolytes periodically during therapy.

Potential Diagnoses


  • PO Administer as directed.
  • Topical Mix 3 drops of rosemary oil (114 mg) in combination with other essential oils massage into scalp nightly for 2 minutes with a warm towel around head to increase absorption.

Patient/Family Teaching

  • Instruct patient to take or use rosemary as directed.
  • Caution female patients to avoid using rosemary and notify health care professional if pregnancy is planned or suspected or if breastfeeding. May lead to abortion.

Evaluation/Desired Outcomes

Improved hair growth.

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