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Michael J. Rathbone et al. 1994 highlighted the benefits of systemic drug delivery using the dental mucosa and discussed regarding the membrane, drug, dosage form and ecological issues which affects its use as being a site for systemic drug delivery.
Amir H. shojaei et al. 1998 mainly discussed regarding the structure and atmosphere within the dental mucosa along with the experimental methods present in assessing buccal drug absorption/permeation. And lastly figured buccal mucosa offers several strengths for controlled release drug delivery for longer times. The Buccal area is fantastic for a retentive dental appliance seems to obtain sufficient using the patient. But, the advantages of safe and effective buccal permeation/absorption enhancers could be a essential requirement for almost any forthcoming future in buccal drug delivery.
PriyaBatheja discussed in chapter Fundamental Biopharmaceutics of Buccal and Sublingual Absorption about dental mucosal route, which can be the possibility choice for drug delivery as well as for macro- and micro molecular deliveries. Administered peptides still remain susceptible to the permeability and enzymatic barrier within the buccal mucosa, plus numerous studies only moderate bioavailability remains observed. The look of techniques like enzyme inhibitors, effervescent tablets, mucoadhesive devices, and absorption enhancers as well as other benefits of example patients acceptability and periodic degradation have initiated many studies for delivery of proteins and peptides using this route.
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Attwood,D et al.,2000 formulated and evaluated sustained release diltiazem sublingual single-layered and bilayered tablets containing 1:4,1:1 and 4:1 weight ratios of pectin and hydroxyl propyl methyl cellulose(HPMC) by using direct compression technique and ethylcellulose was applied as backing layer in bilayered tablet. Measurements of maximum adhesion pressure to rat peritoneal membrane indicated a acceptable bioadhesive strength for several weight ratios of pectin and HPMC were 28.9±4.3, 42.3±7.2 and 66.±4., correspondingly (n=6). Inside the invitro release studies it had been found that. the bilayered tablets had proven prolonged in comparison to individuals of single layered tablets of pectin/HPMC (1:1). Inside the plasma concentration time curves it had been found that. single and bilayered tablets shows sustained effect in comparison with dental. Bioavailability of single layered diltiazem tablet was 2.5 occasions greater than of dental, during situation of bilayered it had been 1.8 occasions. The bioavailabilityofdiltiazem calculated inside the ratio AUC[(dental/i.v)x100] were 75.4% for single layered tablets, 54.5% for bilayered tablets and were instead of the dental bioavailability value[30.4%] and figured single and bilayered has more bioavailability.
Doherty,Junior.et al.,2002 investigated and developed transmucosal drug delivery system for delivery of phosphodiesterase inhibitors to cope with erection disorder using different modes of administration include transbuccal, sublingual and transrectal routes.
Chister Nystrom et al. 2003 developed and introduced a totally new tablet form for sublingual administration. Named is ready by mixing interactively the excipients, comprised of carrier particles partly incorporated in fentanyl citrate drug particles. Within the interests of speeding up retension within the drug molecule to begin of drug absorption within orally, a bioadhesive component made an appearance to get make the carrier material, mix-linked polyvinyl pyrrolidone was applied because the disintegrant and bioadhesive component. Tablets containing 100,200 and 400μg of fentanyl citrate were disintegrated along with the results acquired were 10-seconds and 33-50 seconds, without dvds with dvds. Inside the invitro dissolution studies it had been found that the fentanyl citrate premiered inside the formulations containing 100,200μg,75% release acquired within 1 min. Whereas in 400μg fentanyl tablets dissoluion was slightly slow. The dissolution rates are not influenced upon the compaction within the purchased units. Inside the pharmacokinetic studies, after single dose administration, plasma concentrations of fentanyl were acquired within 10min. The Place underneath the plasma Concentration-Time curves(AUC) of Sublingual dosage form is instead of intravenous form, no under 70% within the doses administered, demonstrated in the systemic circulation.
R.C.Mashru et al.,2005 developed and investigated Fast-Dissolving Film of Salbutamol Sulphate,which may be helpful in a acute attack of bronchial bronchial bronchial asthma. It was prepared having a solvent evaporation technique plus it was administered while using sublingual route. The Sublingual film contains polyvinyl alcohol as being a polymer, glycerol as being a plasticizer, and mannitol as filler. A 33 full factorial design was requested that optimization within the aftereffect of independent variables for example amount of polyvinyl alcohol, amount of glycerol, amount of mannitol across the mechanical characteristics, and % drug relieve film. The multiple regression analysis remains conducted across the results acquired results in describe adequately regarding the influence within the independent variables across the selected responses. Polynomial regression equations and contour plots were selected to relate the dependent and independent variables. The experimental results says polymer concentration, plasticizer concentration, and filler concentration had complex effects on film mechanical behavior and % drug release. Furthermore, the desirability function was employed to be able to determine the very best batch inside the 27 batches within the factorial design. The % relative error was calculated, which proven that observed responses were in close agreement while using the predicted values calculated inside the generated regression equations. It had been found that the optimum values within the responses for fast release film might be acquired at medium amounts of polyvinyl alcohol and glycerol, plus an advanced of mannitol. The prepared film was apparent, transparent, together with an amount surface. The idea of similarity factors Sd was put on show similarity of dissolution between sanitized water and simulated saliva (pH 6.8) or simulated gastric fluid (pH 1.2).
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MutasemM.Rawas-Qalaji et al. 2006 studied and investigated brought on by enhancing epinephrine force on the distinctiveness of fast-disintegrating sublingual tablets for potential emergency treatments of anaphylaxis. Four tablet formulations, A,B,C and D, containing %, 6%, 12% and 24% of epinephrine bitartrate, correspondingly and microcrystalline cellulose. low-substituted hydroxypropyl cellulose (9:1) were selected, and were produced by direct compression, in the different selection of compression forces. Tablet hardness, disintegration time, friability, weight variation, content uniformity and wetting time were measured for formulations each and every compression pressure. A proportional enhancement in compression pressure introduced to have an exponential rise in hardness for people formulations, a vertical line enhancement in disintegration and wetting length of formulation A, along with an exponential rise in wetting serious amounts of disintegration of formulations B, C and D. In the mean ±SD hardness of ≥2.3±.2 kg, all formulations passed the USP friability test. In the mean ±SD hardness of ≤ 3.1±.2kg, all formulations introduced to disintegration and wetting occasions of under 10-seconds and within couple of seconds, correspondingly.
Peter,A,crooks.et.al. 2006 formulated a sublingual spray drug delivery system of oxycodone and investigated brought on by formulation pH on sublingual absorption of oxycodone for acute discomfort management by using rabbit as being a animal model. Employing a new, specific and sensitive liquid chromatography/mass spectroscopy (LC/MS) with electrospray ion technology detector, the bioavailability of sublingual oxycodone was resolute in rabbits by evaluating plasma concentration after sublingual spray delivery using this of equivalent intravenous dose. Brought on by formulation pH on sublingual absorption of oxycodone made an appearance to get performed on rabbits that have received oxycodone through sublingual route in the dose of .1 mg/.1 mL (pH 4. and 9.). Bloodstream stream samples were collected at different time points, and plasma oxycodone concentrations were based on LC/MS. Following administration in the .1 mg dose, the standard Cmaxvalues were seen to become 5807., and 8965.3ng.min/mL for formulation pH 4. and 9., correspondingly. The mean sublingual bioavailability of oxycodone was considered to become 70.1%±17.9% and 45.4%± 20.1% for pH 4. and 9. correspondingly. No important effect on formulation bioavailability (plt0.05). A sublingual spray dosage type of oxycodone hydrochloride may be well suited for fast onset discomfort management, specifically in youngsters.
Oury et al.,2006 investigated and developed sublingual coated tablet of fentanyl. Fentanyl tablet is first compressed using tableting machine PR12 outfitted punches of diameter 5.5mm combined with excipients Emcompress, Avicel PH200, Magnesium stearate. The compressed core tablet will probably be coated by 50 % steps, first the suspension in water of fentanyl citrate and opadry II yellow is sprayed for the core tablet within the drilled pan Trislot. Next factor is disodium phosphate along with PEG6000 is sprayed across the just acquired coated fentanyl tablet. A crossover single-Dose comparative Bioavailability study of tablets prepared versus Actiq .4mg in healthy male volunteers under fasting conditions were conducted and justified using the pharmacokinetic parameters AUC, Cmax,tmax that improved pharmacokinetics and highly enhanced bioavailability remains observed compared to reference product(Actiq)
Stephan Krahenbuhl et al.,2007 studied on new usage of furosemide through sublingual route by performing crossover studies on eleven healthy male volunteers. And compared the pharmacokinetics and pharmacodynamics of sublingual furosemide by administration in dental i.sixth is v route as control. Greater bioavailability remains observed through sublingual route. Excretion of Sodium was greater after sublingual instead of dental administration (peak excretion rate 1.8 versus 1.4 mmol min-1. P‚0.05), whereas urine volume didn’t differ considerably backward and forward application modes. In contrast, intravenous administration proven the expected faster and intense response. Sublingual administered furosemide tablets differ inside a few kinetic and dynamic characteristics from identical tablets given orally. Sublingual administration of furosemide offer therapeutic advantages inside a few categories of patients.
NoushinBolourtchain et al.,2008 developed that’s been enhanced a sublingual tablet formulation of captopril which is a superb drug for hypertension. Captopril containing sublingual tablets were produced by direct compression method using different ingredients for example polyvinyl pyrrolidone, starch 1500, sodium starch glycolate and lactose (independent variables) and magnesium stearate, talc and aspartame (fixed components). Tablets were evaluated for the physical characteristics including hardness, disintegration tome and versatility that have been regarded as responses within the D-optimal experimental plan. The acquired effects were examined statistically using special cubic model and polynomial mathematical equations and seen to become statistically significant (plt0.05) for disintegration serious amounts of friability data. Straight line model was best fitted with hardness data. The acquired effects were acquainted with generate enhanced over lay plot. The physical data inside the record optimization were verified and seen to become near individuals predicted inside the regression analysis. Additional experiments including drug content, in vitro drug dissolution rate ane faster stability studies were also performed across the optimum formulation. All results acquired were satisfied and using the needs in the sublingual tablet.
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MalgorzataSznitowska et al.,2008 investigated fast disintegrating sublingual tablets containing nitroglycerin either complex with β-cyclodextrin (NTG-CD) or titrated with crosspovidone(NTG-Clubpenguin)were prepared using starch 1500 or starlac as disintegrants. Regarding disintegration serious amounts of stability within the active substance starch 1500 was appropriate for NTG-CD while for NTG-Clubpenguin sttarlac was wuitable. Stability of NTG was better in NTG-CD tablets in comparison with NTG-Clubpenguin tablets. However. within 12 a few days of storage at 25oc losing NTG in lots of formulations have been more than 10%.
Sheeba F. R.et.al. 2009 studied and evaluated brought on by growing nifedipine force on the options of fast-disintegrating sublingual tablets for the potential emergency control of anginal discomfort and hypertension. Nifedipine undergoes first pass metabolism in liver and gut wall that has dental bioavailability of 43-77%. Sublingual dosage form bypasses the metabolism within the nifedipine in liver and provides a quick relieve from anginal discomfort and hypertension. An effort remains created to set up fast dissolving tablets of nifedipine using super distintegrants like croscarmellose sodium, sodium starch glycolate, crospovidone. Three different categories of formulations (A, R, and V) with variation in tablet excipients were produced by direct compression method. Tablet weight variation, hardness, friability, drug content, disintegration serious amounts of dissolution time were evaluated for every formulation determined acceptable. The studied sublingual tablet group V shows a smaller sized sized T50% in comparison to commercial dental tablet. Everyone Else V also signifies rapid dissolution and disintegration rate within the enhanced nifedipine sublingual tablet, that’s prerequisite for rapid charge of anginal and hypertension illnesses.
Noushin bolourchian.et.al,( 2009) has designed that’s been enhanced a sublingual tablet formulation of physostigmine salicylate, a effective drug in Alzheimer’s and nerve gas poisoning, with the D-optimal experimental design method. Polyvinyl pyrrolidone, lactose, starch 1500 and sodium starch glycolate were selected for that formulations as independent variables. Tablets were produced with the direct compression method and evaluated for physical characteristics (tablet hardness, disintegration serious amounts of friability), that have been considered as responses within the D-optimal design.Response surface plots were plotted to look at named characteristics along with the enhanced overlay plot was generated while using results. After verification within the optimum checkpoint formulations, an excellent formulation was selected because of its desirable physical characteristics and completely observed and predicted values. Drug assay, content uniformity within the dosage unit, drug dissolution and faster stability studies were performed across the enhanced formulation as further experiments. All of the acquired results complied while using needs from the sublingual tablet formulation.
Alan Lankford et al. 2009 formulated and evaluated Sublingual zolpidem tartrate (SZT) lozenge to cope with insomnia at low dose. Pharmacokinetic studies does and recommended this formulation produces greater drug plasma levels inside the first 15-20 min after dosing in comparison with standard dental tablet only using roughly 30% within the standard dose. Printed data recommended that SZT is usually safe and effective at quickly inducing sedation without residual next-day effects, as extended because the patient doesn’t have under 4 h moving into bed during administration. SZT is presently being reviewed using the US Food and drug administration for potential approval for insomnia characterised by middle-of-the-night awakenings with difficulty coming back to relax.
Koland,M.et.al. 2010 formulated and investigated fast dissolving films of ondansetron hydrochloride for sublingual administration. Sublingual films were prepared from polymers for example polyvinyl alcohol, polyvinyl pyrrolidone, carbopol 934p in a number of ratios by solvent casting method. PEG 400 or Propylene glycol as plasticizers and mannitol or sodium saccharin as sweeteners were also incorporated. The IR spectral studies proven no interaction between drug and polymer or along with other additives. Acceptable effects were acquired when uncovered to physico-chemical tests for example uniformity of weight, thickness, surface pH, folding endurance, uniformity of drug content, swelling index, bioadhesive strength and tensile strength. Sublingual Films were also uncovered to in vitro drug release studies by using USP dissolution apparatus. Ex vivo drug permeation studies were also conducted using porcine membrane model. In vitro release studies indicated 81-96% release within 7 min and 66-80% within 7 min during ex vivo studies. Drug permeation of 66-77% was observed through porcine mucosa within 40 min. Greater volume of drug release was observed from films containing the sweetener. The steadiness studies were performed for 8 days and proven no significant difference in drug content, surface pH plus vitro drug release.
Staner ,C et.al.,2010 compared zolpidem marketed formulation(Edluar) 10mg using this of dental formulation (Ambient)10mg by polysomnography (PSG) in patient with primary insomnia with primary objective ended up being compare the 2 formulations on sleep induction, measured by latency to persistent sleep (LPS), sleep onset latency (SOL) and latency to stage 1 (ST1L). Conducted randomized, double-blind, two-period, mix-over multi-center studies by which each period comprised two successive PSG recording nights. After beginning the PSG recording, treatment was started. Subjective sleep and residual effects were assessed the following morning. 70 women and men patients aged 19-64 were examined during this studies. Sublingual zolpidem considerably shortened LPS by 34% or 10.3 minutes in comparison to dental zolpidem (95% CI: −4.32009min to −16.22009min, p2009=20090.001). SOL and ST1L were also considerably shortened (p2009lt20090.01). Furthermore the 2 formulations were comparable in relation to sleep maintenance characteristics according to total sleep time (TST). The expansion in subjective sleep then-day residual effects didn’t differ backward and forward treatments. Both routes of administration were well tolerated. The outcome ensures that sublingual zolpidem was better to some similar dose of dental zolpidem in relation to sleep inducing characteristics within the carefully selected sample of primary insomnia patients.
Didier,A et.al. 2007 studied and assessed the security, effectiveness and optimal dose of grass pollen tablets for immunotherapy of patients with allergirhinoconjunctivitis. Arandomized, doluble-blind, Placebo- controlled studies were performed on 628 adults with grass pollenrhinoconjunctivitis( this is often confirmed by performing positive skin prick ensure serum-specific IgE) received 1 of three doses in the standardized 5-grass pollen extract, and placebo been performed. given through sublingual route (once-daily). The therapy was performed for 4 a few days with the pollen season. The main effects were Rhinoconjunctivitis Total Symptom Score secondary outcomes incorporated 6 individual symptom scores, save medication use,quality of existence, and safety assessments. Both 300-index of reactivity (IR) and 500-IR doses considerably reduced mean Rhinoconjunctivitis Total SymptomScore (3.58 6 3., P 5 .0001 and three.74 6 3.1, P 0006, Correspondingly) instead of placebo (4.93 6 3.2) pointed out that you’ve a substantial improvement inside the score.Because the 100-IR group (4.70 63.1) score wasn’t considerably completely different from placebo. Analysis of secondary effectiveness variables (sneezing, runny nose, itchynose, nasal congestion, watery eyes, itchy eyes, rescuemedication usage, brilliance existence) confirmed the success within the 300-IR and 500-IR doses. No serious undesirable effects were reported. Within the first pollen season, the success and safety ofsublingual immunotherapy with grass tablets was confirmed.The 300-IR and 500-IR doses both proven significant effectiveness instead of placebo.
ElinaTurunen et.al.,2010 formulated and investigated Fast dissolving sublingual perphenazine tablet by complexation(solid dispersion) with β-cyclodextrin and macrogel 8000. Absorption studies were performed in rabbits. after sublingual administration of perphenazine/macrogol solid dispersion, solid perphenazine/β-CD complex and plain micronized perphenazine, furthermore to after peroral administration in the aqueous perphenazine solution. Solid formulations were produced by freeze-drying (perphenazine/macrogol solid dispersion) or spray-drying (perphenazine/β-CD complex). The worth for area underneath the curve from to 360 min (AUC0-360 min) of perphenazine after peroral administration was only 8% within the AUC0-360 min value acquired after intravenous administration, since the corresponding values for the sublingually administered formulations were 53% (perphenazine/macrogol solid dispersion), 41% (perphenazine/β-CD complex) and 64% (micronized perphenazine). You will find three possible mechanisms to describe these results: avoidance within the first-pass metabolism good sublingual absorption of perphenazine and rapid dissolution rate of perphenazine inside the studied formulations. With sublingual administration, the drug must dissolve quickly in the small volume of saliva. While using present absorption studies in rabbits, the solid dispersion preparation and cyclodextrin complexation were postulated to obtain helpful strategies to achieve effective sublingual administration of perphenazine. Good sublingual absorption made an appearance to get achieved by micronization of perphenazine. Up to now once we understand, this paper is most likely the first one to assess the sublingual administration in the solid dispersion in vivo.
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