Streptokinase is an enzyme produced by certain bacteria, particularly Streptococcus. It is primarily used in medicine to dissolve blood clots, a process known as thrombolysis. By activating the body's natural clot-dissolving system, streptokinase helps restore blood flow in conditions like heart attacks and pulmonary embolisms. This medication is administered intravenously and is often used in emergency situations. While effective, it can cause allergic reactions in some patients and may not be suitable for everyone. Medical professionals carefully evaluate its use based on individual patient conditions and risks.