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Antihistamine combination (H1+H2)

MedicationOff-label2 reviews
+3
Average score out of 5
Based on 2 experience(s)

A combination of H1 and H2 histamine receptor blockers used to treat mast cell activation syndrome (MCAS)-like symptoms in Long COVID.

Information
Subcategory
antihistamines
Evidence level
3/5
Evidence type
case series and clinical practice
Score distribution
+5
0 (0%)
+3
2 (100%)
+1
0 (0%)
0
0 (0%)
Negative
0 (0%)
Most improved symptoms
Post-exertional malaise
50%
Chronic fatigue
50%
Headaches
50%
Palpitations
50%
Memory problems
50%
Practical information
Time to effect
2 weeks
Latest reviews
M
Anonymous review+3
26-35 y.o. · 4/26/2026
M
Anonymous review+3
18-25 y.o. · 4/21/2026
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