S.W.
Try having the medicine flavored with and apple or grape flavoring. Honestly a 15 month old doesn't know what bubble gum tastes like so she probably doesn't like the flavor. That worked for us. If she uses a nuk, they make some to dispense medicine, which also worked for us. As a last resort you could take her in to the doctor and ask him to give and antibiotic shot and skip the hassel of oral med. Good luck