This lesson is going to go over the major points of what we know about the differences between doxycycline hyclate and doxycycline monohydrate. You’ll learn if they’re the same and, if not, why not.
Versions of a Drug
Did you know that when you are prescribed a drug there may be more than one version of it? And, yes, that could mean a different brand name or a different dosage form, like a capsule versus a tablet. But it could also mean it’s almost the same drug, simply a different salt of the drug.
What does that all mean? Find out as we discuss doxycycline hyclate versus doxycycline monohydrate in this lesson.
What Is Doxycycline?
First, let’s quickly go over what doxycycline actually is. Doxycycline is a kind of antibiotic, a drug that targets bacteria, of the tetracycline class of antibiotics. It works by inhibiting protein synthesis and is thus a bacteriostatic antibiotic, one that prohibits bacteria from multiplying.
If the name doxycycline doesn’t ring a bell then maybe you know it better by one of its many brand names. This include Adoxa, Monodox, and Vibramycin.
What Is a Drug Salt?
Doxycycline comes in different salts. No, this doesn’t mean different version of table salt or the fact that it might taste salty. A salt, in pharmacology, refers to an ionisable compound that is combined with a counter-ion in order to form a neutral complex. In other words you’re taking a positively charged substance and combining it with a negatively charged substance in order to make a neutral compound. Actually, table salt is a great simple example of this:
Na(+) + Cl(-) = NaCl
That’s the basic gist of it, of course.
Taking a drug like doxycycline and converting it into a salt form, like doxycycline hyclate or doxycycline monohydrate, might increase the stability of the drug, alter the way the drug can be administered to the patient, or manipulate the way the drug interacts with the body and the body interacts with the drug, and much more.
Hyclate vs. Monohydrate
The details of what drug salts are, how they’re made, their many different types, and their many other potentially important nuances in pharmacology, therapeutics, and clinical medicine are way beyond this lesson’s scope.
What you should know for this lesson’s sake is that doxycycline hyclate and doxycycline monohydrate are two different salts of the same active drug, the latter being doxycycline itself, of course. Their main important difference is in the fact that doxycycline hyclate is water soluble. It’s easily mixable in water. In contrast, doxycycline monohydrate is only very slightly soluble in water. In other words, it doesn’t readily dissolve in water. As a result, this may alter the way each salt form of doxycycline is manufactured for use in medicine.
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