Drug Interactions Directory

135 drugs starting with L.

2,618Drugs
67,117Interactions
53,805Serious (major+)
PharmacistReviewed
1Look up a drugSearch by generic or brand name, or browse A-Z.
2Scan the severityInteractions are grouped and color-coded by how much they matter.
3Read the write-upPlain-English and clinical explanations, with cited evidence.

Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →

L
L-Methylfolate 30 Labetalol 215 Lacosamide 49 Lacosamide Injection 234 Lactated Ringer's Solution 1 Lactulose 9 Lamifiban 4 Lamivudine 8 Lamotrigine 22 Landiolol 29 Lanreotide 26 Lanreotide Acetate 19 Lanreotide Injection 92 Lansoprazole 94 Lanthanum 74 Lanthanum Carbonate 36 Lapatinib 86 Laropiprant 2 Larotrectinib 42 Lasmiditan 27 Latanoprost Ophthalmic 6 Lazabemide 1 Lazertinib 38 Lecanemab-Irmb 19 Lecanemab-Irmb Injection 51 Ledipasvir 13 Lefamulin 443 Leflunomide 58 Lemborexant 67 Lenacapavir 75 Lenacapavir Injection 213 Lenacapavir Oral 213 Lenalidomide 16 Leniolisib 133 Lenvatinib 254 Lepirudin 53 Lercanidipine 12 Lesinurad 36 Letermovir 114 Letermovir Injection 346 Letibotulinumtoxina-Wlbg 15 Letrozole 20 Leucovorin 13 Leucovorin Injection 11 Leuprolide 63 Levacetylleucine 23 Levalbuterol 16 Levalbuterol Hydrochloride 1 Levalbuterol Tartrate 1 Levamisole 4 Levamlodipine 5 Levetiracetam 19 Levetiracetam Injection 16 Levobunolol 58 Levobunolol Ophthalmic 160 Levocabastine 1 Levocarnitine 2 Levocetirizine 21 Levodopa 26 Levodopa Oral Inhalation 208 Levofloxacin 406 Levofloxacin Injection 354 Levoketoconazole 185 Levoleucovorin 5 Levomethadyl 31 Levomethadyl Acetate 1 Levomilnacipran 63 Levonorgestrel 234 Levonorgestrel Intrauterine System 211 Levorphanol 37 Levothyroxine 214 Licorice 38 Lidocaine 33 Lidoflazine 26 Lily Of The Valley 1 Linagliptin 165 Lincomycin 1 Lindane 6 Linerixibat 3 Linezolid 47 Linezolid Injection 212 Linoleic Acid 1 Liothyronine 31 Liraglutide 44 Liraglutide Injection 89 Lisdexamfetamine 55 Lisdexamfetamine Dimesylate 1 Lisinopril 196 Lisocabtagene Maraleucel Injection 15 Lisuride 7 Lithium 71 Lithium Carbonate 317 Lithospermum 5 Lixisenatide 80 Lixisenatide Injection 174 Lobelia 3 Lofepramine 51 Lofexidine 78 Lomefloxacin 32 Lomitapide 83 Lomustine 15 Lonafarnib 146 Lonapegsomatropin-Tcgd 3 Lonapegsomatropin-Tcgd Injection 7 Loncastuximab Tesirine-Lpyl Injection 15 Loperamide 429 Lopinavir 94 Loprazolam 7 Loratadine 29 Lorazepam 31 Lorcainide 13 Lorcaserin 21 Lorlatinib 69 Lormetazepam 7 Lornoxicam 91 Losartan 146 Loteprednol 6 Loteprednol Etabonate 29 Loteprednol Ophthalmic 29 Lovastatin 127