I was looking for a replacement for Entex-LA which is no longer available. I was using 'Entex' to clearup an inner-ear fluid. I just needed 4 more doses, but since the drug making low life were melting down 'Entex', it was taken off the market. It took a bit longer with this Mucinex product, but it worked safely.
On a side note: Why does 鶹 allow opportunists to sell this and other products at gouging prices when supplies are low. Scalping is illegal in many places ... except 鶹.