Vaginal drug administration can improve prophylaxis and treatment of many conditions affecting the female reproductive tract, which includes fungal and bacterial infections, sexually transmitted diseases and cancer also. This is the best route for the administration of proteins, peptides, and also other therapeutic drugs like macro-molecules. For the administration of drugs like contraceptives, steroids, metronidazole, anti-retroviral, vaginal drug delivery is the most preferable route. However, achieving sufficient drug concentration in the vagina can be challenging because of its low permeability. The benefits of the vaginal drug delivery system are it increases the bioavailability, least systemic side effects; easiness of use and self-medication is possible. However vaginal drug delivery system is considered as a less effective route because of the unfortunate absorption of drugs across the vaginal epithelium. The traditional commercial preparations, such as creams, foams, gels, irrigations and tablets, are known to reside in the vaginal cavity for a relatively short period of time owing to the self-cleaning action of the vaginal tract and often require multiple daily doses to ensure the desired therapeutic effect. With the rapidly developing field of nanotechnology, the use of specifically designed carrier systems such as Nanoparticle-based drug delivery has been proven an excellent choice for vaginal application to overcome the challenges associated with the low permeability.
Paracetamol (acetaminophen) with caffeine is a combination medicine indicated for the temporary relief of pain and discomfort associated with a number of conditions such as headache or muscle pain. Paracetamol has a narrow safety margin and there are number of risks associated with paracetamol. It is only safe and effective when used according to directions on OTC (Over-The-Counter) and Rx labelling. However, long-term use of paracetamol increases the risk of kidney and liver failure and makes people more vulnerable to high blood pressure and strokes. Chronic or excessive administration of caffeine has been implicated in a range of dysfunctions involving the liver, renal system, gastrointestinal system, and musculature. A patient taking the combination of paracetamol with caffeine may be more likely to experience adverse effects than to get improved analgesia, compared with paracetamol alone.
Oral administration of drug is the most preferred one among the other routes for the majority of clinical applications. As compared to the parenteral method of administration, it has potential benefits such as increased patient compliance, fewer problems, and reduced treatment costs. Regardless of these factors, inadequate bioavailability owing to poor solubility or permeability limits the therapeutic effectiveness of orally given drugs.Though most current research focuses on BCS II (drugs with low solubility and high permeability), BCS III (drugs with high solubility and low permeability) also has poor oral bioavailability due to their limited permeability across lipid membranes and is usually administered through parenteral route. The need for an oral alternative to parenteral administration has prompted a renewed focus on the development of innovative dosage forms that support the absorption of medicines that are poorly permeable through the intestinal epithelium. Because of their unique size-dependent feature in enhancing transmembrane permeability, ability to incorporate both lipophilic and hydrophilic drugs and biocompatible nature of components the use of nanoparticles for improving drug bioavailability has been a focus of current study in the field of drug delivery in recent years.The lipid-based nanoparticle method presents a potential new avenue for manufacturing BCS Class III medicines with enhanced bioavailability, as poor permeability is the main issue for these agents. This research aims to assess the potential of lipid nanoparticles for improving the oral bioavailability of medicines with permeability-restricted oral absorption, such as pharmaceuticals in Biopharmaceutical Classification System (BCS) class III.
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