Hello looch. I spent some time researching your question. And this is pure speculation on my behalf. I am not a chemist/pharmacist. I believe that in regards to qualitest, would mean the amount or ratio of codeine to the promethazine. As to activest the actual amount of a dose of promethazine/codeine as in a perscription. Thats the best I can offer. Regards, pledge
The only difference is the taste. They are all the exact same product with the same doses of the same active ingredients. Actavis (ACT) is the purple and most preferred. HiTech and Qualitest are just two generic forms and don't taste the same as the ACT. (They have a stronger, more medicine('y') taste.) Some people say that the HiTech and Qualitest make them itch but its really all the same. Literally the only difference is the flavor. All the active ingredients are the same but almost everyone prefers ACT over the generics.
Ok, the difference in them is the manufacturer. Actavis is not brand name. They are all generic... I repeat they are allll generic. Barr pharmaceuticals produced the original brand name which is no longer in production. The difference that makes actavis better is the amount of sugar each manufacturer puts in their product. More sugar= thicker syrup= coats your throats more. Actavis doesn't work any better than the others. It's simply hype, which in turn causes the placebo effect. Hi-tech is just as good as actavis. Now, qualitest is the most carried at pharmacies because it is for diabetics and it cost less because they don't add any glucose (sugar) to their product. Qualitest is the only brand that works less because it's simply not a syrup... it has the consistency of water. By adding corn syrup to it, it is just as good as actavis.
This is why people add jolly ranchers to their mixture, because it makes the drink thicker. I have had every kind multiple times and consider myself a connoisseur. Everything I've said I am 100% positive about through experience and research.
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