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Formulation and evaluation of lidocaine lipid nanosystems for dermal delivery.
AAPS PharmSciTech 2009; 10(3):985-92AP

Abstract

The objective of the present investigation was to formulate solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) for improving the dermal delivery of a local anesthetic agent lidocaine (LID). SLN and NLC were characterized for particle size distribution, polydispersity index, entrapment efficiency, X-ray powder diffraction pattern (XRD), thermal behavior by differential scanning colorimeter (DSC) and surface morphology by transmission electron microscopy (TEM). LID-loaded SLN and NLC were formulated into hydrogels for topical application. The in vitro permeation profiles of LID SLN gel, LID NLC gel, and a marketed LID formulation (Xylocaine gel) were evaluated by using guinea pig skin. The in vivo efficacy of LID SLN gel, LID NLC gel, and a marketed LID formulation (Xylocaine gel) gel was evaluated on guinea pig using pinprick test. LID SLN showed a particle size of 78.1 nm with a polydispersity index of 0.556, whereas LID NLC showed a particle size of 72.8 nm with a polydispersity index of 0.463. The entrapment efficiency of LID in both SLN and NLC was 97% and 95.9%, respectively. The TEM studies revealed the almost spherical nature of LID SLN and NLC formulations. The XRD and DSC studies of LID SLN suggested amorphization of drug in the carrier system. The SLN formulation was stable with respect to particle size, polydispersity, and entrapment efficiency for 6 months at 40 degrees C/75% relative humidity (RH). Negligible leakage was observed for the NLC formulation when stored for 1 month at 40 degrees C/75% RH. In vitro permeation studies indicated that LID SLN gel and LID NLC gel significantly sustained the LID release compared to that of Xylocaine gel. The in vivo efficacy results supported the results of the in vitro permeation studies wherein the LID SLN gel and LID NLC gel resulted in fivefold and sixfold increase in duration of anesthesia, respectively, compared to that of Xylocaine gel.

Authors+Show Affiliations

Department of Pharmaceutics, Bombay College of Pharmacy, Sundernagar, Kalina, Santacruz East, Mumbai 400098, India.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19641997

Citation

Pathak, Pankaj, and Mangal Nagarsenker. "Formulation and Evaluation of Lidocaine Lipid Nanosystems for Dermal Delivery." AAPS PharmSciTech, vol. 10, no. 3, 2009, pp. 985-92.
Pathak P, Nagarsenker M. Formulation and evaluation of lidocaine lipid nanosystems for dermal delivery. AAPS PharmSciTech. 2009;10(3):985-92.
Pathak, P., & Nagarsenker, M. (2009). Formulation and evaluation of lidocaine lipid nanosystems for dermal delivery. AAPS PharmSciTech, 10(3), pp. 985-92. doi:10.1208/s12249-009-9287-1.
Pathak P, Nagarsenker M. Formulation and Evaluation of Lidocaine Lipid Nanosystems for Dermal Delivery. AAPS PharmSciTech. 2009;10(3):985-92. PubMed PMID: 19641997.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Formulation and evaluation of lidocaine lipid nanosystems for dermal delivery. AU - Pathak,Pankaj, AU - Nagarsenker,Mangal, Y1 - 2009/07/30/ PY - 2009/01/15/received PY - 2009/07/02/accepted PY - 2009/7/31/entrez PY - 2009/7/31/pubmed PY - 2010/2/4/medline SP - 985 EP - 92 JF - AAPS PharmSciTech JO - AAPS PharmSciTech VL - 10 IS - 3 N2 - The objective of the present investigation was to formulate solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) for improving the dermal delivery of a local anesthetic agent lidocaine (LID). SLN and NLC were characterized for particle size distribution, polydispersity index, entrapment efficiency, X-ray powder diffraction pattern (XRD), thermal behavior by differential scanning colorimeter (DSC) and surface morphology by transmission electron microscopy (TEM). LID-loaded SLN and NLC were formulated into hydrogels for topical application. The in vitro permeation profiles of LID SLN gel, LID NLC gel, and a marketed LID formulation (Xylocaine gel) were evaluated by using guinea pig skin. The in vivo efficacy of LID SLN gel, LID NLC gel, and a marketed LID formulation (Xylocaine gel) gel was evaluated on guinea pig using pinprick test. LID SLN showed a particle size of 78.1 nm with a polydispersity index of 0.556, whereas LID NLC showed a particle size of 72.8 nm with a polydispersity index of 0.463. The entrapment efficiency of LID in both SLN and NLC was 97% and 95.9%, respectively. The TEM studies revealed the almost spherical nature of LID SLN and NLC formulations. The XRD and DSC studies of LID SLN suggested amorphization of drug in the carrier system. The SLN formulation was stable with respect to particle size, polydispersity, and entrapment efficiency for 6 months at 40 degrees C/75% relative humidity (RH). Negligible leakage was observed for the NLC formulation when stored for 1 month at 40 degrees C/75% RH. In vitro permeation studies indicated that LID SLN gel and LID NLC gel significantly sustained the LID release compared to that of Xylocaine gel. The in vivo efficacy results supported the results of the in vitro permeation studies wherein the LID SLN gel and LID NLC gel resulted in fivefold and sixfold increase in duration of anesthesia, respectively, compared to that of Xylocaine gel. SN - 1530-9932 UR - https://www.unboundmedicine.com/medline/citation/19641997/Formulation_and_evaluation_of_lidocaine_lipid_nanosystems_for_dermal_delivery_ L2 - https://dx.doi.org/10.1208/s12249-009-9287-1 DB - PRIME DP - Unbound Medicine ER -