Comparative Pharmacology
Head-to-head clinical analysis: DOXYCYCLINE versus ROBITET.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DOXYCYCLINE versus ROBITET.
DOXYCYCLINE vs ROBITET
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Doxycycline inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit, preventing the attachment of aminoacyl-tRNA to the mRNA-ribosome complex. It also exhibits anti-inflammatory and anti-collagenase activities.
Robitussin (Robitet) is a combination product containing the antitussive dextromethorphan and the expectorant guaifenesin. Dextromethorphan acts centrally on the cough center in the medulla oblongata by increasing the threshold for coughing, primarily through sigma-1 receptor agonism and NMDA receptor antagonism. Guaifenesin increases the hydration of respiratory tract secretions, reducing mucus viscosity and facilitating expectoration.
100 mg orally or intravenously every 12 hours on day 1, then 100 mg every 12 hours or 50 mg every 6 hours.
Tetracycline hydrochloride: 250-500 mg orally every 6 hours; maximum 4 g/day.
None Documented
None Documented
Clinical Note
moderateMethoxsalen + Doxycycline
"The metabolism of Doxycycline can be decreased when combined with Methoxsalen."
Clinical Note
moderateCyclophosphamide + Doxycycline
"The metabolism of Doxycycline can be decreased when combined with Cyclophosphamide."
Clinical Note
moderatePaclitaxel + Doxycycline
"The metabolism of Doxycycline can be decreased when combined with Paclitaxel."
Clinical Note
moderateDocetaxel + Doxycycline
Terminal elimination half-life is 18–24 hours in patients with normal renal function; prolonged to 20–30 hours in renal impairment; allows once or twice daily dosing.
Terminal elimination half-life: 3.5 hours (2.6–4.8 h) in adults; prolonged to 6–12 h in severe renal impairment
Renal (40%) and fecal/biliary (60%); undergoes enterohepatic circulation; active drug and metabolites excreted in urine and feces.
Renal: 30% unchanged; biliary/fecal: 50% as metabolites; remainder metabolized
Category D/X
Category C
Tetracycline Antibiotic
Tetracycline Antibiotic
"The metabolism of Doxycycline can be decreased when combined with Docetaxel."