Side effects of Cyklokapron may appear anytime, and you should immediately consult your doctor on their appearance. These side effects include: Allergic reactions like rashes, hives, itching, red swollen blistered or peeling skin, wheezing, tightness in chest, swelling of face, mouth, lips, trouble breathing, Flushing, Weakness on one side of the body, Trouble speaking or thinking, Change in balance, Drooping of one side of the face, Blurred vision, Headache, Change in eyesight, eye pain, or severe eye irritation, Feeling very tired or weak, Seizures, Severe dizziness, fainting, Signs of blood clot like coughing up blood, shortness of breath, swelling, warmth, numbness, change of color or pain in leg or arm, trouble speaking or swallowing