SB-202190 is a highly selective, potent and cell-permeable inhibitor of p38 MAP kinase with IC50 values of 50 nM and 100 nM for p38α and p38β respectively; also shows slightly weaker activity for BRD4 (Kd=3.4 μM).

PH-797804 is a pyridinone inhibitor of p38α with IC50 of 26 nM, being 4-fold selective versus p38β and does not inhibit JNK2.

VX-745 is a potent and selective inhibitor of p38α with IC50 of 10 nM, 22-fold greater selectivity versus p38β and no inhibition to p38γ.

TAK-715 is a p38 MAPK inhibitor for p38α with IC50 of 7.1 nM, being 28-fold selective for p38α over p38β, showing no inhibition to p38γ/δ, JNK1, ERK1, IKKβ, MEKK1 or TAK1.

SB 239063 is a potent, selective and oral active p38 MAPK inhibitor with IC50 of 44 nM for recombinant purified p38α.

Losmapimod is a selective, potent, and orally active p38 MAPK inhibitor with pKi of 8.1 and 7.6 for p38α and p38β, respectively.

Pamapimod is a selective inhibitor of p38 mitogen-activated protein kinase. It inhibits p38α and p38β enzymatic activity with IC50 values of 0.014±0.002 and 0.48± 0.04 mM, respectively with no activity against p38delta or p38gamma isoforms.