Leader Tension Headache Pain Reliever 100 Caplets. COMPARE TO EXCEDRIN TENSION HEADACHE active ingredients. Acetaminophen 500 mg | Caffeine 65 mg Pain reliever. Leader Tension Headache provides temporary aspirin-free relief for head neck and shoulder pain associated with stress and tension. This treatment contains both acetaminophen and caffeine a trusted formulation for the nearly 40% of the global population that suffer from tension-type headaches.