Caution is advised for individuals with gastrointestinal issues, as some may experience mild stomach upset or nausea when taking iron supplements. Avoid taking e. tab ENERGY with certain medications such as antacids, bisphosphonates, levodopa, thyroid medications, or specific antibiotics, as they may interfere with the supplement’s absorption or effectiveness. As with any dietary supplement, pregnant or breastfeeding individuals should seek medical advice before use.