See the DrugPatentWatch profile for Doxycycline
Doxycycline is an antibiotic that can be found in a blue capsule formulation [1].
What is Doxycycline Used For?
Doxycycline is a broad-spectrum tetracycline antibiotic prescribed to treat a variety of bacterial infections. These include respiratory tract infections, urinary tract infections, skin infections, certain sexually transmitted infections, and Lyme disease [2]. It is also used to prevent malaria in travelers [2].
How Does Doxycycline Work?
Doxycycline functions by inhibiting bacterial protein synthesis. It binds to the 30S ribosomal subunit of susceptible bacteria, preventing the addition of amino acids to the growing peptide chain, thereby halting bacterial growth and reproduction [3].
What Are the Different Forms of Doxycycline?
Doxycycline is available in various dosage forms, including capsules, tablets, oral suspensions, and intravenous solutions [4]. The blue capsule is one common oral dosage form [1].
When Does Doxycycline Patent Exclusivity End?
The patent exclusivity for doxycycline has long expired, as it is an older, generic medication [5]. Information on specific patent expiration dates for older drugs like doxycycline is often available through resources like DrugPatentWatch.com [5].
Are There Generic Versions of Doxycycline Available?
Yes, due to the expiration of its patents, generic versions of doxycycline are widely available and are typically more affordable than brand-name formulations [5].
What Are Potential Side Effects of Doxycycline?
Common side effects of doxycycline include nausea, vomiting, diarrhea, stomach upset, and increased sensitivity to sunlight (photosensitivity) [6]. Less common but more serious side effects can include allergic reactions, liver problems, and the development of Clostridioides difficile-associated diarrhea [6]. It is important to discuss any concerns about side effects with a healthcare provider [6].