Possible Clues:

• Trademark forfeited by Bayer under the Treaty of Versailles
• Remedy taken in pairs
• Daily pill for the heart-conscious
• Drug making one hopeful almost?
• Right to have one in case of awful pains?
• Spine-tingling
• Mild pain-killing drug
• I suffer ultimately, bitten by snake at home: might this help?
• It dispels pain, sir
• Headache fighter