You can only use this coupon once. Amazon has the 4-Pack SENSODYNE PRONAMEL Breath Enamel Toothpaste for Sensitive Teeth (4oz each, Fresh Wave) for $20 - 40% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $11 with free shipping on $35+ or with Prime. $2.61 per tube.

Also on sale (Price after S&S & coupon): 

• 2-Pack 4 oz Sensodyne Pronamel Kids Toothpaste is $4.38
• 3-Pack 3.4oz Sensodyne Clinical White Toothpaste is $13
• 2-Pack 4oz Sensodyne Fresh Mint Sensitive Toothpaste is $6.86
• 2-Pack Sensodyne Extra Whitening Toothpaste (2.7 oz each) is $4.91
• 4-Pack 3.4oz Sensodyne Sensitivity & Gum Sensitive Toothpaste is $13
• 4-Pack 4oz Sensodyne Pronamel Fresh Breath Enamel Toothpaste is $13
• 3-Pack Parodontax Complete Protection Toothpaste (3.4 oz each) is $9.61
• 3-Pack 4oz Sensodyne Pronamel Daily Protection Enamel Toothpaste is $9.61 
• Sensodyne Pronamel Gentle Whitening Toothpaste (0.8oz Travel Size) is $1.10
• 3-Pack 3.4oz Sensodyne Pronamel Clinical Enamel Strength Toothpaste is $13
• 3-Pack Sensodyne Sensitivity & Gum Whitening Toothpaste (3.4oz tubes) is $9.88
• 4-Pack Sensodyne Pronamel Intensive Enamel Repair Toothpaste (3.4oz tubes) is $12