What can I do to help prevent DVT on a long flight?

Wear comfortable, loose-fitting clothes for travel. Drink plenty of water or juice, but avoid drinking alcohol. When seated, shift the position of your body periodically. You can also do simple exercises, or walk around the plane when safely permitted. Wear compression stockings, and avoid sleeping tablets. Sometimes, a preventative anticoagulation is used, which can be self-injected by the patient.