Small-molecule drugs

Minoxidil, sold under the brand names Loniten and Rogaine among others, is a medication used for the treatment of high blood pressure and pattern hair loss. It is an antihypertensive and a vasodilator. It is available as a generic medication by prescription in oral tablet form and over-the-counter as a topical liquid or foam.

Ibrutinib, sold under the brand name Imbruvica among others, is a small molecule drug that inhibits B-cell proliferation and survival by irreversibly binding the protein Bruton's tyrosine kinase (BTK). Blocking BTK inhibits the B-cell receptor pathway, which is often aberrantly active in B cell cancers. Ibrutinib is therefore used to treat such cancers, including mantle cell lymphoma, chronic lymphocytic leukemia, and Waldenström's macroglobulinemia. Ibrutinib also binds to C-terminal Src Kinases, which are off-target receptors for the BTK inhibitor. This binding inhibits the kinase from promo

Iguratimod is an anti-inflammatory small molecule drug used for the treatment of rheumatoid arthritis, together with methotrexate in Japan and China. As of 2015, the biological target was not known, but it prevents NF-κB activation and subsequently selectively inhibits COX-2 and several inflammatory cytokines.