Try searching with just the first 3 or 4 letters of the brand or generic name. Search results are refined as you type. If this still returns too many entries, you can type more letters or can type a space and then letters of a second term of the drug name.
Note: myDrugCosts generally excludes over-the-counter drugs and biologic drugs. myDrugCosts only shows prescription drugs that have been approved by the FDA or by your specific health plan.