Generic Medicines A–Z
Browse an A–Z index of generic medicine names and active ingredients listed by Direct Meds, then compare available products, strengths and packs.
OlanzapineAn atypical antipsychotic that adjusts dopamine and serotonin signalling to manage schizophrenia and bipolar I disorder.1 medicineView OlanzapineOlopatadineBlocks histamine release in the eye to prevent allergic itching and redness from pollen, dust or pet dander.1 medicineView OlopatadineOmeprazoleBlocks stomach acid at the source to treat reflux and ulcers in adults.1 medicineView OmeprazoleOndansetronBlocks serotonin signals that trigger the vomiting reflex, used to prevent nausea after chemotherapy or surgery.1 medicineView OndansetronOrlistatOrlistat blocks fat absorption in the gut, which also limits uptake of fat-soluble vitamins.1 medicineView OrlistatOseltamivirAn antiviral that stops the flu virus from spreading to new cells, used for influenza A and B.1 medicineView OseltamivirOxybutyninRelaxes the bladder muscle to reduce sudden urges and frequency in overactive bladder.1 medicineView Oxybutynin