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Famotidine

MedicationOff-label2 reviews
+4
Average score out of 5
Based on 2 experience(s)

An H2 antihistamine used to reduce gastric acid. In the context of Long COVID, it is studied for its antihistaminic and anti-inflammatory effects, often combined with an H1 antihistamine to address symptoms related to mast cell activation.

Brand names
Pepcid
Information
Subcategory
H2 antihistamine
Evidence level
3/5
Evidence type
observational studies and case series
Score distribution
+5
1 (50%)
+3
1 (50%)
+1
0 (0%)
0
0 (0%)
Negative
0 (0%)
Practical information
Time to effect
< 1 week
Latest reviews
F
Anonymous review+5
36-45 y.o. · 5/2/2026
M
Anonymous review+3
26-35 y.o. · 4/26/2026

In a few days I went from constant nausea and stomach tenderness to minimal levels thereof. I think fatigue and brain fog also lowered although that's harder to say

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