- 拉贝洛尔/Labetalol
- 拉西地平/Lacidipine
- 拉科酰胺/Lacosamide
- 乳糖醇/Lactitol
- 拉呋替丁/Lafutidine
- 拉米夫定/Lamivudine
- 拉莫三嗪/Lamotrigine
- 兰索拉唑/Lansoprazole
- 拉帕替尼/Lapatinib
- 拉罗替尼/Larotrectinib
- 拉索昔芬/Lasofoxifene
- 拉坦前列腺素/Latanoprost
- 雷迪帕韦/Ledipasvir
- 来氟米特/Leflunomide
- 来那度胺/Lenalidomide
- 乐伐替尼/Lenvatinib
- 乐卡地平/Lercanidipine
- 莱特莫韦/Letermovir
- 来曲唑/Letrozole
- 亮丙瑞林/Leuprolide
- 左旋沙丁胺醇/Levalbuterol
- 左旋咪唑/Levamisole
- 左乙拉西坦/Levetiracetam
- 左卡巴司丁/Levocabastine
- 左旋肉碱/Levocarnitine
- 左西替利嗪/Levocetirizine
- 左旋多巴/Levodopa
- 左羟丙哌嗪/Levodropropizine
- 左氧氟沙星/Levofloxacin
- 左美吗嗪/Levomepromazine
- 左炔诺孕酮/Levonorgestrel
- 左甲状腺素/Levothyroxine
- 利多卡因/Lidocaine
- 利那洛肽/Linaclotide
- 利格列汀/Linagliptin
- 林可霉素/Lincomycin
- 利奈唑胺/Linezolid
- 碘塞罗宁/Liothyronine
- 赖诺普利/Lisinopril
- 洛贝林/Lobeline
- 洛美沙星/Lomefloxacin
- 洛莫司汀/Lomustine
- 洛哌丁胺/Loperamide
- 洛匹那韦/Lopinavir
- 氯雷他定/Loratadine
- 氯卡色林/Lorcaserin
- 氯诺昔康/Lornoxicam
- 氯沙坦/Losartan
- 氯替泼诺/Loteprednol
- 洛伐他汀/Lovastatin
- 洛沙平/Loxapine
- 洛索洛芬/Loxoprofen
- 鲁比前列酮/Lubiprostone
- 卢立康唑/Luliconazole
- 芦马卡托/Lumacaftor
- 苯芴醇/Lumefantrine
- 鲁拉西酮/Lurasidone
- 卢曲波帕/Lusutrombopag
- 赖氨甲四环素/Lymecycline
