Indication

Diphenhydramine for Dystonic reaction

1,335 under review110 sources100 named agencies34 statesas of 2026-09-20

Adult dosing has a median of 50 mg across 98 published protocols, with the middle half between 25 and 50.

110sources

100named agencies

34states

194entries

96named here

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

Adultmg

98sources

90named agencies

33states

105entries

0kept as written

min	p25	median	p75	max
25	25	50	50	50

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 34%
IV/IO/IM 25%
IV 14%
IV/IO/IM/PO 9%
IM 6%
IV/IO 6%
IV/IM/PO 4%
PO 2%
IO/IM 1%

United States EMS Protocol Census, n=98 protocols from 90 named agencies / 33 states, updated Sep 2026

Pediatric, weight-basedmg/kg

71sources

65named agencies

23states

76entries

0kept as written

min	p25	median	p75	max
0.5	1	1	1	1.5

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 34%
IV/IO/IM 26%
IV 13%
IV/IO/IM/PO 13%
IM 7%
IV/IM/PO 3%
IV/IO 3%
IO/IM 1%

United States EMS Protocol Census, n=71 protocols from 65 named agencies / 23 states, updated Sep 2026

Adult, weight-basedmg/kg

11sources

10named agencies

9states

12entries

0kept as written

min	p25	median	p75	max
1	1	1	1	1

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 42%
IV/IO/IM 25%
IV/IO/IM/PO 25%
IV 8%

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

Pediatricmg

1sources

1named agencies

1states

1entries

1kept as written

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

Routes

IV/IO 100%

United States EMS Protocol Census, n=1 protocols from 1 named agencies / 1 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.