SIDE EFFECTS OF Ciplox MEDICATION Get emergency medical help if you have any of these signs of an allergic reaction to Ciplox: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Stop using Ciplox and call your doctor at once if you have a serious side effect such as: severe dizziness, fainting, fast or pounding heartbeats; sudden pain, snapping or popping sound,