I have phenergan 25mg tablets and liquid robitussin that has dextromethorphan HBr 10mg per dose for adults. is either worth it and how much do i need to take of either one to extend the nod and buzz from my opiates. something tells me the phenergan is better but i dont know much about potentiating drugs. so i need to know which is preferred and how much to take and when to take it please. thanks guys for all your help......its priceless and i guarantee this site has saved many lives do to the accurate answers and detailed descriptions on what not and what to do. so again THANKS! 
