Butea superba (red kwao krua) and sexual function

What 2 graded rows on butea superba (red kwao krua) agree on for sexual function, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the Butea superba (red kwao krua) page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the Butea superba (red kwao krua) page, with its PubMed record.

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Sexual function2

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Butea superba (red kwao krua) and sexual function

2 rows · 71 people

Split. 1 row found no difference and 1 had mixed results.

No difference or mixed

Improved

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

Grade D× 1
No effect× 1

Rows: 2
Trials: 2
People: 71

What the rows share

From the rows

The best-graded row, grade D, is a randomized trial of 39 people (2003) and reported mixed results. 1 row is graded No effect, our grade for adequately powered trials that found no effect.

The rows run from 32 to 39 people, published from 2003 to 2010: 2 single studies.

The rows

1 no difference · 1 mixed

No effectErectile function (IIEF-5) vs sildenafil, then vs starch · No difference
Open-label trial · n 32 · 2010 · Men with organic erectile dysfunction
100 mg Butea superba product · Short-term, with a 1-week washout
In the open phase, 84% responded to the first Butea batch vs 81% to sildenafil. In the double-blind phase the second batch had no effect. The authors concluded the first batch was most likely blended with a PDE5 inhibitor, which the supplier later confirmed.
Row on the Butea superba (red kwao krua) page · PubMed 19624593 (opens PubMed)
Grade DErectile function (IIEF-5) with a lost placebo group · Mixed
RCT · n 39 · 2003 · Thai men aged 30 to 70 with erectile dysfunction for at least 6 months
1,000 mg/day (500 mg/day for the first 4 days) · 3 months
Among men given Butea, 4 of 5 IIEF-5 items improved from baseline and 14 of the 17 men who finished (82.4%) reported some improvement. All placebo participants had dropped out by week 3, so no comparison with placebo was possible. Blood counts, blood chemistry and testosterone did not change.
Row on the Butea superba (red kwao krua) page · PubMed 12937809 (opens PubMed)

Read onRead the full evidenceThe full evidence chapter on its page, with every outcome and its sources.