Indication

Diphenhydramine for Anaphylaxis

93 sources74 named agencies37 statesas of 2026-10-31

Pediatric weight-based dosing has a median of 1 mg/kg across 87 published protocols, with the middle half between 1 and 1.

93sources

74named agencies

37states

217entries

73named here

Includes 1 agency outside the US.

Doses far off from what other protocols give are likely misreads, so they are left out until checked. How that works.

Pediatric, weight-basedmg/kg

87sources

69named agencies

36states

105entries

0kept as written

min	p25	median	p75	max
0.5	1	1	1	2

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

United States EMS Protocol Census, n=87 protocols from 69 named agencies / 36 states, updated Oct 2026

84sources

67named agencies

34states

104entries

0kept as written

min	p25	median	p75	max
12.5	25	37.5	50	50

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

United States EMS Protocol Census, n=84 protocols from 67 named agencies / 34 states, updated Oct 2026

8sources

6named agencies

6states

8entries

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 medication five times still gets one vote.

United States EMS Protocol Census, n=8 protocols from 6 named agencies / 6 states, updated Oct 2026

Named agencies with a page73

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