Eucalyptus Oil (1,8-Cineole) and asthma

What 2 graded rows on eucalyptus oil (1,8-cineole) agree on for asthma, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the Eucalyptus Oil (1,8-Cineole) page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the Eucalyptus Oil (1,8-Cineole) page, with its PubMed record.

Supplement

Eucalyptus Oil (1,8-Cineole) Choose another

2 rows · 279 people

They agree: both rows found an improvement.

No difference

Improved

Each block is one evidence row, sized by how many people it enrolled, with its grade inside.

From the rows

The best-graded row, grade C, is a randomized trial of 247 people (2012) and found an improvement.

The rows run from 32 to 247 people, published from 2003 to 2012: 2 single studies.

2 improved

Grade CLung function, asthma symptoms and quality of life (combined) · Improved
RCT · n 247 · 2012 · Patients with confirmed asthma (multicentre)
200 mg three times daily · 6 months
The combined outcome favoured cineole (p = .0027); individual measures were each only modestly significant (FEV1 p = .0398, symptoms p = .0325, quality of life p = .0475).
Row on the Eucalyptus Oil (1,8-Cineole) page · PubMed 22978309 (opens PubMed)
Grade DOral steroid reduction in steroid-dependent asthma · Improved
RCT · n 32 · 2003 · Patients with severe, steroid-dependent bronchial asthma
200 mg three times daily · 12 weeks
Prednisolone could be cut by 36% on cineole vs 7% on placebo (P = 0.006); 12 of 16 vs 4 of 16 patients reduced their oral steroid.
Row on the Eucalyptus Oil (1,8-Cineole) page · PubMed 12645832 (opens PubMed)