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Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt

Author(s):  Pramar Yashoda V, Graves Richard A, Ledet Grace A, Phan Kelly V, Bostanian Levon A, Mandal Tarun K

Issue:  Sep/Oct 2016 - Volume 20, Number 5
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Page(s):  421-425

Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt Page 1
Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt Page 2
Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt Page 3
Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt Page 4
Stability of Clindamycin Hydrochloride in PCCA Base SuspendIt Page 5

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Abstract:  Clindamycin is an effective antibiotic in the treatment of infections caused by certain gram-positive and gram-negative anaerobic microorganisms. While manufactured forms of the drug for pediatric use are available, there are instances when a compounded liquid dosage form is essential to meet unique patient needs. The purpose of this study was to determine the chemical stability of clindamycin hydrochloride in the PCCA base SuspendIt, a sugar-free, paraben- free, dye-free, and gluten-free thixotropic vehicle containing a natural sweetener obtained from the monk fruit. It thickens upon standing to minimize settling of any insoluble drug particles and becomes fluid upon shaking to allow convenient pouring during administration to the patient. A robust stability-indicating high-performance liquid chromatographic assay for the determination of clindamycin hydrochloride in SuspendIt was developed and validated. This assay was used to determine the chemical stability of the drug in SuspendIt. Samples were prepared and stored under three different temperature conditions (5°C, 25°C, and 40°C), and assayed using the high-performance liquid chromatographic assay at pre-determined intervals over an extended period of time as follows: 7, 14, 30, 45, 60, 91, 120, and 182 days at each designated temperature. Physical data such as pH, viscosity, and appearance were also monitored. The study showed that drug concentration did not go below 90% of the label claim (initial drug concentration) at all three temperatures studied, barring isolated experimental errors. Viscosity and pH values also did not change significantly. Some variations in viscosity were attributed to the thixotropic nature of the vehicle. This study demonstrates that clindamycin hydrochloride is physically and chemically stable in SuspendIt for 182 days in the refrigerator and at room temperature, thus providing a viable, compounded alternative for clindamycin hydrochloride in a liquid dosage form, with an extended beyond-use date to meet patient needs.

Related Keywords: Yashoda V. Pramar, PhD, Richard A. Graves, MS, Grace A. Ledet, MS, Kelly V. Phan, Levon A. Bostanian, PhD, Tarun K. Mandal, PhD, clindamycin, antibiotic, antimicrobial agent, oral suspenion, hypoallergenic commercial suspending product, natural thixotropic agent, long-term stability, forced degradation study

Related Categories: EXCIPIENTS, PEER-REVIEWED, STABILITIES, COMPATIBILITIES, INFECTIOUS DISEASE

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