Indication

Ondansetron for Nausea / vomiting

1,335 under review163 sources144 named agencies39 statesas of 2026-09-20

Adult dosing has a median of 4 mg across 158 published protocols, with the middle half between 4 and 4.

163sources

144named agencies

39states

513entries

140named here

1,335 rows are under review across the census and excluded from every number on this page. How that works.

Adultmg

158sources

139named agencies

38states

283entries

0kept as written

min	p25	median	p75	max
4	4	4	4	8

Values in mg. One value per source (that source's median), so a document listing a drug five times still gets one vote.

Routes

IV/IM 19%
PO 12%
ODT 11%
IV 11%
IV/IO/IM 8%
IV/IM/ODT 5%
IM 5%
IV/IO/IM/PO/ODT 4%
IV/IO 3%
PO/ODT 3%
IV/IM/PO 3%
IV/IM/PO/ODT 2%
IV/IO/IM/PO 2%
SL 2%
IV/IO/ODT 1%
IV/IO/IM/ODT 1%
IV/ODT 1%
IV/IM/IN 1%
IV/IO/IM/IN/PO 1%
IV/IO/PO/SL 1%
IV/SL 1%
PO/SL 1%
SL/ODT 1%
IM/ODT 0%
IO 0%
IV/IM/PO/SL 0%
IV/IM/SL 0%
IV/IO/IM/SL 0%
IV/IO/PO 0%
IV/PO 0%
IV/PO/SL 0%

United States EMS Protocol Census, n=158 protocols from 139 named agencies / 38 states, updated Sep 2026

Pediatric, weight-basedmg/kg

107sources

93named agencies

31states

140entries

0kept as written

min	p25	median	p75	max
0.1	0.1	0.1	0.15	0.2

Values in mg/kg. One value per source (that source's median), so a document listing a drug five times still gets one vote.

Routes

IV/IM 26%
IV 16%
IV/IO/IM/PO/ODT 9%
IV/IO/IM 8%
IM 5%
IV/IM/PO 5%
IV/IO 5%
IV/IO/IM/PO 4%
IV/IM/ODT 3%
IV/IO/ODT 2%
ODT 2%
PO 2%
IV/IM/IN 1%
IV/IM/PO/ODT 1%
IV/IO/IM/IN/PO 1%
IV/IO/PO/SL 1%
IV/ODT 1%
IV/SL 1%
IV/IM/PO/SL 1%
IV/IM/SL 1%
IV/IO/IM/ODT 1%
IV/IO/IM/SL 1%
IV/PO 1%
IV/PO/SL 1%
SL 1%

United States EMS Protocol Census, n=107 protocols from 93 named agencies / 31 states, updated Sep 2026

Pediatricmg

58sources

56named agencies

24states

72entries

3kept as written

min	p25	median	p75	max
2	2	4	4	8

Values in mg. One value per source (that source's median), so a document listing a drug five times still gets one vote.

Routes

PO 32%
ODT 24%
IV/IM 10%
PO/ODT 8%
IV/IM/ODT 7%
IV/IO 3%
IV/IO/IM 3%
PO/SL 3%
IM 1%
IV 1%
IV/IO/IM/ODT 1%
IV/IO/ODT 1%
IV/IO/PO 1%
IV/PO 1%
SL/ODT 1%
SQ/PO 1%

United States EMS Protocol Census, n=58 protocols from 56 named agencies / 24 states, updated Sep 2026

Adult, weight-basedmg/kg

11sources

10named agencies

9states

15entries

0kept as written

min	p25	median	p75	max
0.1	0.1	0.15	0.15	0.2

Values in mg/kg. One value per source (that source's median), so a document listing a drug five times still gets one vote.

Routes

IV/IM 20%
IV/IO/IM 20%
IV/IO/PO/ODT 13%
IV 7%
IV/IM/PO 7%
IV/IO/IM/PO/ODT 7%
IV/IO/ODT 7%
ODT 7%
PO 7%
PO/ODT 7%

United States EMS Protocol Census, n=11 protocols from 10 named agencies / 9 states, updated Sep 2026

Pediatrictablet

3sources

3named agencies

2states

3entries

3kept as written

Below 5 sources, so no distribution is published for this group — only the counts above.

Routes

PO 67%
SL 33%

United States EMS Protocol Census, n=3 protocols from 3 named agencies / 2 states, updated Sep 2026

Named agencies

Agencies whose protocols are a public record are named here. Their own doses are on their own pages; this list carries no values.