Leader Mucus Relief Extended Release Maximum Strength, 1200 mg Guaifenesin,14 Extended Release Tablets Sale! from 1389 1667 /per Qty. Sold Out This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Maximum Strength Chest Congestion Medicine Thins & loosens mucus with active ingredient guaifenesin expectorant Relieves Chest Congestion Comparable to Mucinex Maximum Strength Qty available:0 Tweet