Zelcaine Injection should only be administered by healthcare professionals to ensure safe and effective use This medication works by temporarily numbing the surgical area and preventing pain signals from reaching the brain thus making procedures painless Common side effects of Zelcaine Injection include pain swelling and redness at the injection site These side effects are typically mild and shortlived However if you experience persistent numbness or other side effects at the injection site it is important to consult your doctor without delay Before using Zelcaine Injection inform your doctor if you have any underlying heart disease or if you are taking medications for heart rhythm problems If you are pregnant or breastfeeding consult your doctor for advice before using this medication It is worth noting that Zelcaine Injection may cause dizziness so it is advisable to avoid driving or operating heavy machinery while on this medication