Sweet violet (Viola odorata) and cough

What 2 graded rows on sweet violet (viola odorata) agree on for cough, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the Sweet violet (Viola odorata) page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the Sweet violet (Viola odorata) page, with its PubMed record.

Supplement

Sweet violet (Viola odorata) Choose another

2 rows · 290 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 182 people (2015) and found an improvement.

The rows run from 108 to 182 people, published from 2015 to 2023: 2 single studies.

2 improved

Grade CCough in children with intermittent asthma (add-on) · Improved
RCT · n 182 · 2015 · Children aged 2-12 with intermittent asthma (Iran)
Dose not stated in the abstract · Until cough resolved
Time to a 50% cough reduction and to full cough suppression was shorter with violet syrup (P = .001 and < .001).
Row on the Sweet violet (Viola odorata) page · PubMed 25954025 (opens PubMed)
Grade CCOVID-19 symptoms in outpatients (add-on) · Improved
RCT · n 108 · 2023 · Adult COVID-19 outpatients (Isfahan, Iran)
Dose not stated in the abstract · 7 days
All symptoms improved in both groups; cough (P = 0.025), muscle pain, headache and diarrhoea fell more with violet syrup.
Row on the Sweet violet (Viola odorata) page · PubMed 36535329 (opens PubMed)