| Acetaminophen | The serum concentration of Sphingosine can be increased when it is combined with Acetaminophen. | Approved |
| Afatinib | The serum concentration of Sphingosine can be increased when it is combined with Afatinib. | Approved |
| Albendazole | The serum concentration of Sphingosine can be increased when it is combined with Albendazole. | Approved, Vet Approved |
| Aldosterone | The serum concentration of Sphingosine can be decreased when it is combined with Aldosterone. | Experimental |
| Alectinib | The serum concentration of Sphingosine can be increased when it is combined with Alectinib. | Approved |
| Alfentanil | The serum concentration of Sphingosine can be increased when it is combined with Alfentanil. | Approved, Illicit |
| Amantadine | The serum concentration of Sphingosine can be increased when it is combined with Amantadine. | Approved |
| Aminohippuric acid | The serum concentration of Sphingosine can be increased when it is combined with Aminohippuric acid. | Approved |
| Amiodarone | The serum concentration of Sphingosine can be decreased when it is combined with Amiodarone. | Approved, Investigational |
| Amitriptyline | The serum concentration of Sphingosine can be increased when it is combined with Amitriptyline. | Approved |
| Amlodipine | The serum concentration of Sphingosine can be increased when it is combined with Amlodipine. | Approved |
| Amprenavir | The serum concentration of Sphingosine can be decreased when it is combined with Amprenavir. | Approved |
| Amsacrine | The serum concentration of Sphingosine can be increased when it is combined with Amsacrine. | Approved |
| Astemizole | The serum concentration of Sphingosine can be increased when it is combined with Astemizole. | Approved, Withdrawn |
| Atazanavir | The serum concentration of Sphingosine can be increased when it is combined with Atazanavir. | Approved, Investigational |
| Atenolol | The serum concentration of Sphingosine can be increased when it is combined with Atenolol. | Approved |
| Atorvastatin | The serum concentration of Sphingosine can be increased when it is combined with Atorvastatin. | Approved |
| Azelastine | The serum concentration of Sphingosine can be increased when it is combined with Azelastine. | Approved |
| Azithromycin | The serum concentration of Sphingosine can be increased when it is combined with Azithromycin. | Approved |
| Benzocaine | The serum concentration of Sphingosine can be increased when it is combined with Benzocaine. | Approved |
| Bepridil | The serum concentration of Sphingosine can be increased when it is combined with Bepridil. | Approved, Withdrawn |
| Biperiden | The serum concentration of Sphingosine can be increased when it is combined with Biperiden. | Approved |
| Bosutinib | The serum concentration of Sphingosine can be increased when it is combined with Bosutinib. | Approved |
| Bromocriptine | The serum concentration of Sphingosine can be increased when it is combined with Bromocriptine. | Approved, Investigational |
| Buprenorphine | The serum concentration of Sphingosine can be increased when it is combined with Buprenorphine. | Approved, Illicit, Investigational, Vet Approved |
| Buspirone | The serum concentration of Sphingosine can be increased when it is combined with Buspirone. | Approved, Investigational |
| Cabazitaxel | The serum concentration of Sphingosine can be increased when it is combined with Cabazitaxel. | Approved |
| Caffeine | The serum concentration of Sphingosine can be increased when it is combined with Caffeine. | Approved |
| Canagliflozin | The serum concentration of Sphingosine can be increased when it is combined with Canagliflozin. | Approved |
| Candesartan | The serum concentration of Sphingosine can be increased when it is combined with Candesartan. | Approved |
| Captopril | The serum concentration of Sphingosine can be increased when it is combined with Captopril. | Approved |
| Carbamazepine | The serum concentration of Sphingosine can be decreased when it is combined with Carbamazepine. | Approved, Investigational |
| Carvedilol | The serum concentration of Sphingosine can be increased when it is combined with Carvedilol. | Approved, Investigational |
| Caspofungin | The serum concentration of Sphingosine can be increased when it is combined with Caspofungin. | Approved |
| Chloroquine | The serum concentration of Sphingosine can be increased when it is combined with Chloroquine. | Approved, Vet Approved |
| Chlorpromazine | The serum concentration of Sphingosine can be increased when it is combined with Chlorpromazine. | Approved, Vet Approved |
| Chlorpropamide | The serum concentration of Sphingosine can be increased when it is combined with Chlorpropamide. | Approved |
| Chlorprothixene | The serum concentration of Sphingosine can be increased when it is combined with Chlorprothixene. | Approved, Withdrawn |
| Cholesterol | The serum concentration of Sphingosine can be increased when it is combined with Cholesterol. | Experimental |
| Cholic Acid | The serum concentration of Sphingosine can be decreased when it is combined with Cholic Acid. | Approved |
| Cilazapril | The serum concentration of Sphingosine can be increased when it is combined with Cilazapril. | Approved |
| Cimetidine | The serum concentration of Sphingosine can be decreased when it is combined with Cimetidine. | Approved |
| Ciprofloxacin | The serum concentration of Sphingosine can be increased when it is combined with Ciprofloxacin. | Approved, Investigational |
| Citalopram | The serum concentration of Sphingosine can be increased when it is combined with Citalopram. | Approved |
| Clarithromycin | The serum concentration of Sphingosine can be increased when it is combined with Clarithromycin. | Approved |
| Clofazimine | The serum concentration of Sphingosine can be increased when it is combined with Clofazimine. | Approved, Investigational |
| Clomipramine | The serum concentration of Sphingosine can be increased when it is combined with Clomipramine. | Approved, Vet Approved |
| Clotrimazole | The serum concentration of Sphingosine can be decreased when it is combined with Clotrimazole. | Approved, Vet Approved |
| Cobicistat | The serum concentration of Sphingosine can be increased when it is combined with Cobicistat. | Approved |
| Colchicine | The serum concentration of Sphingosine can be increased when it is combined with Colchicine. | Approved |
| Colforsin | The serum concentration of Sphingosine can be increased when it is combined with Colforsin. | Experimental |
| Crizotinib | The serum concentration of Sphingosine can be increased when it is combined with Crizotinib. | Approved |
| Cyclophosphamide | The serum concentration of Sphingosine can be increased when it is combined with Cyclophosphamide. | Approved, Investigational |
| Cyclosporine | The serum concentration of Sphingosine can be decreased when it is combined with Cyclosporine. | Approved, Investigational, Vet Approved |
| Daclatasvir | The serum concentration of Sphingosine can be increased when it is combined with Daclatasvir. | Approved |
| Dactinomycin | The serum concentration of Sphingosine can be increased when it is combined with Dactinomycin. | Approved |
| Dasatinib | The serum concentration of Sphingosine can be increased when it is combined with Dasatinib. | Approved, Investigational |
| Daunorubicin | The serum concentration of Sphingosine can be decreased when it is combined with Daunorubicin. | Approved |
| Desipramine | The serum concentration of Sphingosine can be increased when it is combined with Desipramine. | Approved |
| Desloratadine | The serum concentration of Sphingosine can be increased when it is combined with Desloratadine. | Approved, Investigational |
| Dexamethasone | The serum concentration of Sphingosine can be decreased when it is combined with Dexamethasone. | Approved, Investigational, Vet Approved |
| Dextromethorphan | The serum concentration of Sphingosine can be increased when it is combined with Dextromethorphan. | Approved |
| Diclofenac | The serum concentration of Sphingosine can be increased when it is combined with Diclofenac. | Approved, Vet Approved |
| Digoxin | The serum concentration of Sphingosine can be decreased when it is combined with Digoxin. | Approved |
| Dihydroergotamine | The serum concentration of Sphingosine can be increased when it is combined with Dihydroergotamine. | Approved |
| Diltiazem | The serum concentration of Sphingosine can be increased when it is combined with Diltiazem. | Approved |
| Dipyridamole | The serum concentration of Sphingosine can be increased when it is combined with Dipyridamole. | Approved |
| Doxazosin | The serum concentration of Sphingosine can be increased when it is combined with Doxazosin. | Approved |
| Doxepin | The serum concentration of Sphingosine can be increased when it is combined with Doxepin. | Approved |
| Doxorubicin | The serum concentration of Sphingosine can be decreased when it is combined with Doxorubicin. | Approved, Investigational |
| Dronabinol | The serum concentration of Sphingosine can be increased when it is combined with Dronabinol. | Approved, Illicit |
| Dronedarone | The serum concentration of Sphingosine can be increased when it is combined with Dronedarone. | Approved |
| Elbasvir | The serum concentration of Sphingosine can be increased when it is combined with Elbasvir. | Approved |
| Enalapril | The serum concentration of Sphingosine can be increased when it is combined with Enalapril. | Approved, Vet Approved |
| Enzalutamide | The serum concentration of Sphingosine can be increased when it is combined with Enzalutamide. | Approved |
| Ergonovine | The serum concentration of Sphingosine can be increased when it is combined with Ergonovine. | Approved |
| Ergotamine | The serum concentration of Sphingosine can be increased when it is combined with Ergotamine. | Approved |
| Erythromycin | The serum concentration of Sphingosine can be decreased when it is combined with Erythromycin. | Approved, Vet Approved |
| Estramustine | The serum concentration of Sphingosine can be increased when it is combined with Estramustine. | Approved |
| Estriol | The serum concentration of Sphingosine can be decreased when it is combined with Estriol. | Approved, Vet Approved |
| Estrone | The serum concentration of Sphingosine can be decreased when it is combined with Estrone. | Approved |
| Etoposide | The serum concentration of Sphingosine can be increased when it is combined with Etoposide. | Approved |
| Etravirine | The serum concentration of Sphingosine can be increased when it is combined with Etravirine. | Approved |
| Felodipine | The serum concentration of Sphingosine can be increased when it is combined with Felodipine. | Approved, Investigational |
| Fentanyl | The serum concentration of Sphingosine can be increased when it is combined with Fentanyl. | Approved, Illicit, Investigational, Vet Approved |
| Fexofenadine | The serum concentration of Sphingosine can be increased when it is combined with Fexofenadine. | Approved |
| Fidaxomicin | The serum concentration of Sphingosine can be increased when it is combined with Fidaxomicin. | Approved |
| Fluconazole | The serum concentration of Sphingosine can be increased when it is combined with Fluconazole. | Approved |
| Fluoxetine | The serum concentration of Sphingosine can be increased when it is combined with Fluoxetine. | Approved, Vet Approved |
| Flupentixol | The serum concentration of Sphingosine can be increased when it is combined with Flupentixol. | Approved, Withdrawn |
| Fluphenazine | The serum concentration of Sphingosine can be increased when it is combined with Fluphenazine. | Approved |
| Flurazepam | The serum concentration of Sphingosine can be increased when it is combined with Flurazepam. | Approved, Illicit |
| Fluvoxamine | The serum concentration of Sphingosine can be increased when it is combined with Fluvoxamine. | Approved, Investigational |
| Gefitinib | The serum concentration of Sphingosine can be increased when it is combined with Gefitinib. | Approved, Investigational |
| Genistein | The serum concentration of Sphingosine can be increased when it is combined with Genistein. | Investigational |
| Glyburide | The serum concentration of Sphingosine can be increased when it is combined with Glyburide. | Approved |
| Gramicidin D | The serum concentration of Sphingosine can be increased when it is combined with Gramicidin D. | Approved |
| Grepafloxacin | The serum concentration of Sphingosine can be increased when it is combined with Grepafloxacin. | Withdrawn |
| Haloperidol | The serum concentration of Sphingosine can be increased when it is combined with Haloperidol. | Approved |
| Hydrocortisone | The serum concentration of Sphingosine can be increased when it is combined with Hydrocortisone. | Approved, Vet Approved |
| Idelalisib | The serum concentration of Sphingosine can be increased when it is combined with Idelalisib. | Approved |
| Imatinib | The serum concentration of Sphingosine can be increased when it is combined with Imatinib. | Approved |
| Imipramine | The serum concentration of Sphingosine can be increased when it is combined with Imipramine. | Approved |
| Indinavir | The serum concentration of Sphingosine can be decreased when it is combined with Indinavir. | Approved |
| Indomethacin | The serum concentration of Sphingosine can be increased when it is combined with Indomethacin. | Approved, Investigational |
| Isavuconazonium | The serum concentration of Sphingosine can be increased when it is combined with Isavuconazonium. | Approved, Investigational |
| Itraconazole | The serum concentration of Sphingosine can be increased when it is combined with Itraconazole. | Approved, Investigational |
| Ivacaftor | The serum concentration of Sphingosine can be increased when it is combined with Ivacaftor. | Approved |
| Ivermectin | The serum concentration of Sphingosine can be increased when it is combined with Ivermectin. | Approved, Vet Approved |
| Ketamine | The serum concentration of Sphingosine can be increased when it is combined with Ketamine. | Approved, Vet Approved |
| Ketoconazole | The serum concentration of Sphingosine can be increased when it is combined with Ketoconazole. | Approved, Investigational |
| Lansoprazole | The serum concentration of Sphingosine can be increased when it is combined with Lansoprazole. | Approved, Investigational |
| Lapatinib | The serum concentration of Sphingosine can be increased when it is combined with Lapatinib. | Approved, Investigational |
| Levofloxacin | The serum concentration of Sphingosine can be increased when it is combined with Levofloxacin. | Approved, Investigational |
| Levothyroxine | The serum concentration of Sphingosine can be decreased when it is combined with Levothyroxine. | Approved |
| Lidocaine | The serum concentration of Sphingosine can be increased when it is combined with Lidocaine. | Approved, Vet Approved |
| Liothyronine | The serum concentration of Sphingosine can be decreased when it is combined with Liothyronine. | Approved, Vet Approved |
| Liotrix | The serum concentration of Sphingosine can be decreased when it is combined with Liotrix. | Approved |
| Lisinopril | The serum concentration of Sphingosine can be increased when it is combined with Lisinopril. | Approved, Investigational |
| Lomitapide | The serum concentration of Sphingosine can be increased when it is combined with Lomitapide. | Approved |
| Loperamide | The serum concentration of Sphingosine can be increased when it is combined with Loperamide. | Approved |
| Lopinavir | The serum concentration of Sphingosine can be increased when it is combined with Lopinavir. | Approved |
| Loratadine | The serum concentration of Sphingosine can be increased when it is combined with Loratadine. | Approved |
| Losartan | The serum concentration of Sphingosine can be increased when it is combined with Losartan. | Approved |
| Lovastatin | The serum concentration of Sphingosine can be increased when it is combined with Lovastatin. | Approved, Investigational |
| Lumacaftor | The serum concentration of Sphingosine can be decreased when it is combined with Lumacaftor. | Approved |
| Maprotiline | The serum concentration of Sphingosine can be increased when it is combined with Maprotiline. | Approved |
| Mebendazole | The serum concentration of Sphingosine can be increased when it is combined with Mebendazole. | Approved, Vet Approved |
| Mefloquine | The serum concentration of Sphingosine can be increased when it is combined with Mefloquine. | Approved |
| Megestrol acetate | The serum concentration of Sphingosine can be increased when it is combined with Megestrol acetate. | Approved, Vet Approved |
| Meprobamate | The serum concentration of Sphingosine can be increased when it is combined with Meprobamate. | Approved, Illicit |
| Methadone | The serum concentration of Sphingosine can be increased when it is combined with Methadone. | Approved |
| Metoprolol | The serum concentration of Sphingosine can be increased when it is combined with Metoprolol. | Approved, Investigational |
| Mibefradil | The serum concentration of Sphingosine can be increased when it is combined with Mibefradil. | Withdrawn |
| Miconazole | The serum concentration of Sphingosine can be increased when it is combined with Miconazole. | Approved, Investigational, Vet Approved |
| Midazolam | The serum concentration of Sphingosine can be decreased when it is combined with Midazolam. | Approved, Illicit |
| Mifepristone | The serum concentration of Sphingosine can be decreased when it is combined with Mifepristone. | Approved, Investigational |
| Mitomycin | The serum concentration of Sphingosine can be increased when it is combined with Mitomycin. | Approved |
| Mitoxantrone | The serum concentration of Sphingosine can be decreased when it is combined with Mitoxantrone. | Approved, Investigational |
| Morphine | The serum concentration of Sphingosine can be increased when it is combined with Morphine. | Approved, Investigational |
| Naltrexone | The serum concentration of Sphingosine can be increased when it is combined with Naltrexone. | Approved, Investigational, Vet Approved |
| Naringenin | The serum concentration of Sphingosine can be increased when it is combined with Naringenin. | Experimental |
| Nefazodone | The serum concentration of Sphingosine can be decreased when it is combined with Nefazodone. | Approved, Withdrawn |
| Nelfinavir | The serum concentration of Sphingosine can be decreased when it is combined with Nelfinavir. | Approved |
| Neostigmine | The serum concentration of Sphingosine can be increased when it is combined with Neostigmine. | Approved, Vet Approved |
| Nicardipine | The serum concentration of Sphingosine can be increased when it is combined with Nicardipine. | Approved |
| Nifedipine | The serum concentration of Sphingosine can be decreased when it is combined with Nifedipine. | Approved |
| Nilotinib | The serum concentration of Sphingosine can be increased when it is combined with Nilotinib. | Approved, Investigational |
| Nisoldipine | The serum concentration of Sphingosine can be increased when it is combined with Nisoldipine. | Approved |
| Nitrazepam | The serum concentration of Sphingosine can be increased when it is combined with Nitrazepam. | Approved |
| Nitrendipine | The serum concentration of Sphingosine can be increased when it is combined with Nitrendipine. | Approved |
| Norethisterone | The serum concentration of Sphingosine can be decreased when it is combined with Norethisterone. | Approved |
| Omeprazole | The serum concentration of Sphingosine can be increased when it is combined with Omeprazole. | Approved, Investigational, Vet Approved |
| P-Nitrophenol | The serum concentration of Sphingosine can be increased when it is combined with P-Nitrophenol. | Experimental |
| Paclitaxel | The serum concentration of Sphingosine can be increased when it is combined with Paclitaxel. | Approved, Vet Approved |
| Palmitic Acid | The serum concentration of Sphingosine can be increased when it is combined with Palmitic Acid. | Experimental |
| Pantoprazole | The serum concentration of Sphingosine can be increased when it is combined with Pantoprazole. | Approved |
| Paroxetine | The serum concentration of Sphingosine can be increased when it is combined with Paroxetine. | Approved, Investigational |
| Perindopril | The serum concentration of Sphingosine can be increased when it is combined with Perindopril. | Approved |
| Phenobarbital | The serum concentration of Sphingosine can be decreased when it is combined with Phenobarbital. | Approved |
| Pimozide | The serum concentration of Sphingosine can be increased when it is combined with Pimozide. | Approved |
| Platelet Activating Factor | The serum concentration of Sphingosine can be decreased when it is combined with Platelet Activating Factor. | Experimental |
| Ponatinib | The serum concentration of Sphingosine can be increased when it is combined with Ponatinib. | Approved |
| Posaconazole | The serum concentration of Sphingosine can be increased when it is combined with Posaconazole. | Approved, Investigational, Vet Approved |
| Pravastatin | The serum concentration of Sphingosine can be increased when it is combined with Pravastatin. | Approved |
| Prazosin | The serum concentration of Sphingosine can be increased when it is combined with Prazosin. | Approved |
| Prednisone | The serum concentration of Sphingosine can be increased when it is combined with Prednisone. | Approved, Vet Approved |
| Probenecid | The serum concentration of Sphingosine can be increased when it is combined with Probenecid. | Approved |
| Progesterone | The serum concentration of Sphingosine can be decreased when it is combined with Progesterone. | Approved, Vet Approved |
| Promethazine | The serum concentration of Sphingosine can be increased when it is combined with Promethazine. | Approved |
| Propafenone | The serum concentration of Sphingosine can be increased when it is combined with Propafenone. | Approved |
| Propranolol | The serum concentration of Sphingosine can be increased when it is combined with Propranolol. | Approved, Investigational |
| Protriptyline | The serum concentration of Sphingosine can be increased when it is combined with Protriptyline. | Approved |
| Quercetin | The serum concentration of Sphingosine can be increased when it is combined with Quercetin. | Experimental |
| Quinacrine | The serum concentration of Sphingosine can be increased when it is combined with Quinacrine. | Approved |
| Quinidine | The serum concentration of Sphingosine can be increased when it is combined with Quinidine. | Approved |
| Quinine | The serum concentration of Sphingosine can be increased when it is combined with Quinine. | Approved |
| Ranitidine | The serum concentration of Sphingosine can be increased when it is combined with Ranitidine. | Approved |
| Ranolazine | The serum concentration of Sphingosine can be increased when it is combined with Ranolazine. | Approved, Investigational |
| Reboxetine | The serum concentration of Sphingosine can be increased when it is combined with Reboxetine. | Approved, Investigational |
| Regorafenib | The serum concentration of Sphingosine can be increased when it is combined with Regorafenib. | Approved |
| Reserpine | The serum concentration of Sphingosine can be decreased when it is combined with Reserpine. | Approved |
| Rifampicin | The serum concentration of Sphingosine can be decreased when it is combined with Rifampicin. | Approved |
| Rilpivirine | The serum concentration of Sphingosine can be increased when it is combined with Rilpivirine. | Approved |
| Ritonavir | The serum concentration of Sphingosine can be decreased when it is combined with Ritonavir. | Approved, Investigational |
| Rolapitant | The serum concentration of Sphingosine can be increased when it is combined with Rolapitant. | Approved |
| Saquinavir | The serum concentration of Sphingosine can be decreased when it is combined with Saquinavir. | Approved, Investigational |
| Scopolamine | The serum concentration of Sphingosine can be increased when it is combined with Scopolamine. | Approved |
| Selegiline | The serum concentration of Sphingosine can be increased when it is combined with Selegiline. | Approved, Investigational, Vet Approved |
| Sertraline | The serum concentration of Sphingosine can be increased when it is combined with Sertraline. | Approved |
| Simeprevir | The serum concentration of Sphingosine can be increased when it is combined with Simeprevir. | Approved |
| Simvastatin | The serum concentration of Sphingosine can be increased when it is combined with Simvastatin. | Approved |
| Sirolimus | The serum concentration of Sphingosine can be decreased when it is combined with Sirolimus. | Approved, Investigational |
| Sorafenib | The serum concentration of Sphingosine can be increased when it is combined with Sorafenib. | Approved, Investigational |
| Spironolactone | The serum concentration of Sphingosine can be increased when it is combined with Spironolactone. | Approved |
| St. John's Wort | The serum concentration of Sphingosine can be decreased when it is combined with St. John's Wort. | Nutraceutical |
| Staurosporine | The serum concentration of Sphingosine can be increased when it is combined with Staurosporine. | Experimental |
| Streptozocin | The serum concentration of Sphingosine can be decreased when it is combined with Streptozocin. | Approved |
| Sulfinpyrazone | The serum concentration of Sphingosine can be increased when it is combined with Sulfinpyrazone. | Approved |
| Sumatriptan | The serum concentration of Sphingosine can be increased when it is combined with Sumatriptan. | Approved, Investigational |
| Sunitinib | The serum concentration of Sphingosine can be increased when it is combined with Sunitinib. | Approved, Investigational |
| Tacrine | The serum concentration of Sphingosine can be increased when it is combined with Tacrine. | Withdrawn |
| Tacrolimus | The serum concentration of Sphingosine can be decreased when it is combined with Tacrolimus. | Approved, Investigational |
| Tamoxifen | The serum concentration of Sphingosine can be decreased when it is combined with Tamoxifen. | Approved |
| Taurocholic Acid | The serum concentration of Sphingosine can be increased when it is combined with Taurocholic Acid. | Experimental |
| Telmisartan | The serum concentration of Sphingosine can be increased when it is combined with Telmisartan. | Approved, Investigational |
| Temsirolimus | The serum concentration of Sphingosine can be increased when it is combined with Temsirolimus. | Approved |
| Terazosin | The serum concentration of Sphingosine can be increased when it is combined with Terazosin. | Approved |
| Terfenadine | The serum concentration of Sphingosine can be increased when it is combined with Terfenadine. | Withdrawn |
| Tesmilifene | The serum concentration of Sphingosine can be decreased when it is combined with Tesmilifene. | Investigational |
| Testosterone | The serum concentration of Sphingosine can be increased when it is combined with Testosterone. | Approved, Investigational |
| Ticagrelor | The serum concentration of Sphingosine can be increased when it is combined with Ticagrelor. | Approved |
| Tolvaptan | The serum concentration of Sphingosine can be increased when it is combined with Tolvaptan. | Approved |
| Trazodone | The serum concentration of Sphingosine can be decreased when it is combined with Trazodone. | Approved, Investigational |
| Trifluoperazine | The serum concentration of Sphingosine can be increased when it is combined with Trifluoperazine. | Approved |
| Triflupromazine | The serum concentration of Sphingosine can be increased when it is combined with Triflupromazine. | Approved, Vet Approved |
| Trimethoprim | The serum concentration of Sphingosine can be decreased when it is combined with Trimethoprim. | Approved, Vet Approved |
| Trimipramine | The serum concentration of Sphingosine can be increased when it is combined with Trimipramine. | Approved |
| Venlafaxine | The serum concentration of Sphingosine can be increased when it is combined with Venlafaxine. | Approved |
| Verapamil | The serum concentration of Sphingosine can be decreased when it is combined with Verapamil. | Approved |
| Vinblastine | The serum concentration of Sphingosine can be decreased when it is combined with Vinblastine. | Approved |
| Vincristine | The serum concentration of Sphingosine can be decreased when it is combined with Vincristine. | Approved, Investigational |
| Vinorelbine | The serum concentration of Sphingosine can be increased when it is combined with Vinorelbine. | Approved, Investigational |
| Zimelidine | The serum concentration of Sphingosine can be increased when it is combined with Zimelidine. | Withdrawn |