1. For long-haul travelers at risk of DVT, anticoagulant use is considered based on individual risk factors such as previous DVT, cancer, or thrombophilia. Mechanical prophylaxis and frequent ambulation are also effective preventive strategies.

2. In high-risk long-haul travelers, anticoagulants like low-molecular-weight heparin may be used. Effectiveness increases with accompanying strategies such as wearing compression stockings and regular movement.

3. Assessing the risk factors like age, previous DVT history, and genetic predisposition is crucial before anticoagulant use in travelers. Prophylactic measures including hydration and leg exercises also play key roles in prevention.

4. For travelers with elevated DVT risk, preventive anticoagulation is recommended, combined with non-pharmacological methods like leg exercises and wearing graduated compression stockings, which together help reduce thrombosis risk effectively.