PD-168077 maleate is a selective dopamine D4 receptor agonist, with a Ki of 9 nM.

Pemirolast Potassium (BMY 26517) is a histamine H1 antagonist and mast cell stabilizer that acts as an antiallergic agent.

PF-00446687 hydrochloride (PF-446687) is a potent, selective melanocortin-4 receptor (MC4R) agonist with EC50 of 12 nM.

PF-00446687(PF-446687) is a potent, selective melanocortin-4 receptor (MC4R) agonist with EC50 of 12 nM.

PF-04418948 is an orally active, potent, and selective EP2 receptor antagonist (IC50 = 16 nM).

PF-04995274 is a 5-HT4 receptor partial agonist. It thought to act centrally as a pro-cognitive agent that being developed for the treatment of Alzheimer's disease (AD).

PF-06764427 (PF06764427) is a potent, selective M1 muscarinic acetylcholine receptor (mAChR) positive allosteric modulator with EC50 of 55 nM, has no measurable agonist or PAM activity at the M2-M5 receptors at 10 uM.

PF-06827443 (PF06827443) is a potent, orally bioavailable, and CNS-penetrant M1-selective positive allosteric modulator (PAM) with EC50 of 47 nM, shows no activity against M2-M5 at 10 uM.

PF-3274167 is a high-affinity nonpeptide oxytocin receptor (OTR) antagonist, with Ki of 9.5 nM.

PHCCC is a Group I metabotropic glutamate receptor antagonist (IC50 ~ 3 μM).

Pheniramine Maleate ia an antihistamine and vasoconstrictor.

Phentolamine Mesylate is a nonselective alpha-adrenergic antagonist.

Phenylbiguanide is a 5-HT3 receptor selective agonist with an EC50 of 3.0±0.1 μM.

Piboserod (SB 207266) is a selective 5-HT(4) receptor antagonist.

Pimavanserin(ACP-103) is a potent and selective 5-HT2A receptor inverse agonist with mean pIC50 of with 8.7 in the cell-based functional assay.

Piperoxan hydrochloride is an α2 adrenoceptor antagonist.

Pirmenol hydrochloride inhibits IK.ACh by blocking muscarinic receptors. The IC50 of Pirmenol for inhibition of Carbachol-induced IK.ACh is 0.1 μM.

Pitolisant Hcl(BF2.649;Ciproxidine ) is a novel, potent, and selective nonimidazole inverse agonist at the recombinant human H3 receptor (Ki=0.16 nM).

Plerixafor is a chemokine receptor antagonist for CXCR4 and CXCL12-mediated chemotaxis with IC50 of 44 nM and 5.7 nM, respectively.

Plerixafor octahydrochloride(AMD3100 8HCL) is a chemokine receptor antagonist for CXCR4 and CXCL12-mediated chemotaxis with IC50 of 44 nM and 5.7 nM, respectively.

Ponesimod(ACT-128800) is an orally active, selective sphingosine-1-phosphate receptor 1 (S1P1) immunomodulator with EC50 of 5.7 nM.

Potent and selective 5-HT6 receptor antagonist (pKi = 8.6).