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. 2023 Jul 17;10:1202696. doi: 10.3389/fcvm.2023.1202696

Table 2.

Clinical outcomes in 14 patients with long-COVID after 20 days of treatment with H1 and H2 receptor blockers, and in 13 untreated patients with long-COVID.

Symptoms Treated patients (n = 14) Untreated patients (n = 13)
At baseline (%) Unchanged 20 days after (%) p-Value At baseline (%) Unchanged 20 days after (%) p-Value
Fatigue 100 21 <0.0001 100 85 0.4800
Brain fog 93 43 0.0127 85 70 0.6447
Increased HR 93 29 0.0013 92 85 1.0000
Abdominal disorders 79 14 0.0048 77 62 0.6727

HR, heart rate.