From: Effect of tadalafil on blood flow, pain, and function in chronic cold Complex Regional Pain Syndrome: a randomized controlled trial
tadalafil
placebo
start
end
Pt
Pgt
Temperature difference (in °C)
1.71 ± 0.77
1.09 ± 1.6
1.65 ± 2.6
1.77 ± 1.9
0.54
0.37
Pain intensity VAS (0–100 mm)
61.3 ± 14.1
52.3 ± 19.1
57.0 ± 12.1
56.5 ± 10.8
0.03*
0.04*