Table 5 -- Drugs that commonly cause nausea as a side effect Narcotic analgesics NSAIDs -- naproxen, sulindac, oxaprozin, diflunisal, piroxicam, indomethacin, etodolac, ibuprofen, ketoprofen, mefenamic acid, nabumetone Tramadol Theophylline Digoxin Selective serotonin re-uptake inhibitors -- paroxitene, fluoxetine, sertraline Antibiotics -- metronidazole, trimethoprim-sulfamethoxazole, erythromycin Anti-helminthics -- albendazole, thiabendazole Iodoquinol Estrogens Chloroquine Levodopa Bromocriptine Bisphosphonates Potassium salts Iron salts