- Lac-Dose 3000 FCC Captab
- Lacrisert
- Lactaid
- LaMICtal
- Lamisil
- Lamprene
- Lanoxicaps
- Lanoxin
- Lantus
- Lariam
- Lasix
- Lastacaft
- Latisse
- Latuda
- Laviv
- Lazanda
- Leena
- Lenalidomide
- Lenvima
- Lescol
- Letairis
- Leucovorin
- Leukeran
- Leukine
- Leustatin
- Levamisole
- Levaquin
- Levatol
- Levemir
- Levitra
- Levo-Dromoran
- Levora
- Levothyroid
- Levulan Kerastick
- Lexapro
- Lexiscan
- Lexiva
- Lexxel
- Librax
- Librium
- Lidex
- Liletta
- Limbitrol
- Limbrel
- Lincocin
- Lindane
- Lindane
- Linzess
- Lioresal
- Lipitor
- Liptruzet
- Liquimat
- Livalo
- Lo Loestrin Fe
- Lodine
- Lokara
- Lomocot
- Lomotil
- Loniten
- Lonsurf
- Lopamiro
- Lopid
- Lopressor
- Lopressor HCT
- Lorabid
- Loratadine
- Lorzone
- Lotensin
- Lotensin HCT
- Lotrel
- Lotrisone
- Lotronex
- Lovaza
- Lovenox
- Loxitane
- Lozol
- Lucentis
- Ludiomil
- Lumizyme
- Lunelle Monthly Contraceptive
- Lunesta
- Lupaneta Pack
- Lusedra
- Luvox
- Luzu
- Lyme disease vaccine
- Lymphazurin
- Lymphoseek
- Lynparza
- Lyrica
- Lysodren
- Lysteda