The veins commonly used for venipuncture are found in the:

The antecubital fossa is the area of the arm where the major veins for venipuncture, such as the median cubital vein, are located. This vein is typically larger and more centrally situated than those found in other locations, making it easier to access for drawing blood or administering medications. The antecubital fossa is also relatively superficial, which further facilitates the procedure.

While the veins in the distal forearm, wrist area, and hand might be accessed for venipuncture, they are generally smaller and more difficult to puncture successfully compared to those in the antecubital fossa. The antecubital fossa is the preferred site because it not only offers a higher success rate but also minimizes the risk of complications, such as excessive bruising or damage to surrounding nerves and arteries.