Eriacta 100 mg can cause side effects. Let’s go through it carefully and thoroughly. What Eriacta 100 mg is Active ingredient: Sildenafil citrate (same as Viagra, Vigora, Malegra). Use: Treats erectile dysfunction (ED). Dosage: 100 mg is usually the maximum recommended single dose, taken 30–60 minutes before ***** activity, once per 24 hours. Common Side Effects These are usually mild and temporary: Headache Flushing (redness of face/neck) Indigestion / upset stomach Nasal congestion Dizziness or lightheadedness Visual disturbances (like blurred vision or blue-tinted vision) Serious (Rare) Side Effects Seek immediate medical attention if any occur: Chest pain, irregular heartbeat, or shortness of breath Severe dizziness or fainting Sudden vision loss in one or both eyes (could be NAION, a rare eye problem) Sudden hearing loss or ringing in the ears Priapism (painful erection lasting more than 4 hours; medical emergency) Precautions Do not take if using nitrates (nitroglycerin, isosorbide) → dangerous drop in blood pressure. Use caution if you have heart, liver, kidney, or blood pressure problems. Avoid excessive alcohol; it can worsen side effects.  is the highest standard dose, so side effects are more likely than at 25 or 50 mg. Doctors often start patients at 50 mg to see how they tolerate it, then adjust if necessary. If you want, I can make a clear chart comparing the side effects of Eriacta 100 mg, Vigora 50 mg, Malegra 50 mg, and Tadarise 20 mg, so you can see which drug has more risk at typical doses. This is very useful for safe choices.