四環素類抗生素( 四環素母核
tetracycline antibiotics)是由放線菌產生的一類廣譜抗生素，包括金霉素(chlotetracycline)、土霉素(oxytetracycline)、四環素(tetracycline)及半合成衍生物甲烯土霉素、強力霉素、二甲胺基四環素等，其結構均含并四苯基本骨架。

貨號            中文名                                            英文名                                                       包裝

31741     四環素鹽酸鹽                          Tetracycline hydrochloride                           250mg

37918     4-差向四環素                           4-Epitetracycline hydrochloride                  100mg

37919     脫水四環素鹽酸鹽                   Anhydrotetracycline hydrochloride             100mg

37921     4-差向脫水四環素鹽酸鹽       4-Epianhydrotetracycline hydrochloride    100mg

46598     土霉素鹽酸鹽                            Oxytetracycline hydrochloride                     250mg

46133      金霉素鹽酸鹽                          Chlortetraycline hydrochloride                     250mg

46161      去甲基金霉素鹽酸鹽水合物   Demeclocyline hydrochloride hydrate       100mg

33429      強力霉素鹽酸鹽                       Doxycycline hyclate                                       100mg

37906      甲烯土霉素鹽酸鹽                   Methacycline hydrochloride                          100mg