Kamagra Gold 100 mg tablets are generally well tolerated, but you may still experience side effects. The most common side effects are: headache, dizziness, hot flashes, indigestion, nasal congestion, diarrhea, rash. More serious side effects include unusual heartbeats, urinary tract infection (urination or burning in the urine, more frequent urination), blood in the urine, vision changes such as blurred vision, blue vision, or increased sensitivity to light, persistent headache or fainting, nosebleed.