text: Drugs from the same therapeutic or chemical class are usually given names with the same stem. Stems are mostly placed word-finally, but in some cases word-initial stems are used. They are collected in a publication informally known as the Stem Book.
  Examples are:
  * -anib for angiogenesis inhibitors (e.g. pazopanib)
  * -anserin for serotonin receptor antagonists, especially 5-HT antagonists (e.g. ritanserin and mianserin)
  * -ant for various receptors antagonists (e.g. aticaprant and rimonabant)
  * -arit for antiarthritic agents (e.g. lobenzarit)
  * -ase for enzymes (e.g. alteplase)
  * -azepam or -azolam for benzodiazepines (e.g. diazepam and alprazolam)
  * -caine for local anaesthetics (e.g. procaine or cocaine)
  * -cain- for class I antiarrhythmics (e.g. procainamide)
  * -coxib for COX-2 inhibitors, a type of anti-inflammatory drugs (e.g. celecoxib)
  * -mab for monoclonal antibodies (e.g. infliximab); see Nomenclature of monoclonal antibodies
  *-- for cannabinoid receptor agonists (e.g. cannabidiol, dronabinol)
  * for cannabinoid receptor antagonists 
  * -olol for beta blockers (e.g. atenolol)
  * -pril for ACE inhibitors (e.g. captopril)
  * -sartan for angiotensin II receptor antagonists (e.g. losartan)
  * -tinib for tyrosine kinase inhibitors (e.g. imatinib)
  * -vastatin for HMG-CoA reductase inhibitors, a group of cholesterol-lowering agents (e.g. simvastatin)
  * -vir for antivirals (e.g. aciclovir or ritonavir)
  **  for antiretroviral protease inhibitors (e.g. darunavir)
  * arte- for artemisinin antimalarials (e.g. artemether)
  * cef- for cephalosporins (e.g. cefalexin)
  * io- for iodine-containing radiopharmaceuticals (e.g. iobenguane)
  * -vec for gene therapy vectors (e.g. alipogene tiparvovec)
  * -meran for messenger RNA products (e.g. tozinameran)