Histamine2 receptor antagonists: Rapid development of tachyphylaxis with repeat dosing Peptides stimulate growth hormone and IGF 1 production, promoting angiogenesis and cellular proliferation. In patients with undetected cancers, these peptides can accelerate tumor growth. Conventional imaging misses early cancers. Circulating tumor Identification, characterization, and structure activity relationship of the ASIC3 selective peptide WRPRFa Communications Chemistry Tachyphylaxis an overview ScienceDirect Topics