Rebamipide, an amino acid derivative of 2-(1H)-quinolinone, is used for mucosal protection, healing of gastroduodenal ulcers, and treatment of gastritis.It works by enhancing mucosal defense, scavenging free radicals and temporarily activating genes encoding cyclooxygenase-2

Studies have shown that rebamipide can fight the damaging effects of NSAIDs on the GIT mucosa and more recently, the small intestine, but not for naproxen-induced gastric damage.
 

Docusate is the common chemical and pharmaceutical name of the anion bis(2-ethylhexyl) sulfosuccinate, also commonly called dioctyl sulfosuccinate (DOSS).

Salts of this anion, especially docusate sodium, are widely used in medicine as laxatives and as stool softeners, by mouth or rectally.Docusate sodium is on the WHO List of Essential Medicines. It is a widely available and relatively inexpensive generic medication, with more than six million prescriptions in the US in 2017.Other docusate salts with medical use include those of calcium, sodium, and potassium.

Docusate salts are also used as food additives, emulsifiers, dispersants, and wetting agents, among other uses

Metoclopramide is a medication used mostly for stomach and esophageal problems It is commonly used to treat and prevent nausea and vomiting, to help with emptying of the stomach in people with delayed stomach emptying, and to help with gastroesophageal reflux disease.It is also used to treat migraine headaches

In 2012, metoclopramide was one of the top 100 most prescribed medications in the United States.It is available as a generic medication.It is on the World Health Organization's List of Essential Medicines In 2017, it was the 253rd most commonly prescribed medication in the United States, with more than one million prescriptions.

Saccharomyces boulardii is a tropical species of yeast first isolated from lychee and mangosteen fruit in 1923 by French scientist Henri Boulard. Although early reports described distinct taxonomic, metabolic, and genetic properties S. boulardii is a strain of S. cerevisiae, sharing >99% genomic relatedness, giving the synonym S. cerevisiae var boulardii. A type strain is Hansen CBS 5926.

S. boulardii is sometimes used as a probiotic with the purpose of introducing beneficial microbes into the large and small intestines and conferring protection against pathogens.It grows at 37 °C (98.6 °F).In addition, the popular genome-editing tool CRISPR-Cas9 was proven to be effective in S. boulardii.^[9] Boulard first isolated this yeast after he observed natives of Southeast Asia chewing on the skin of lychee and mangosteen in an attempt to control the symptoms of cholera. In healthy patients, S. boulardii has been shown to be nonpathogenic and nonsystemic (it remains in the gastrointestinal tract rather than spreading elsewhere in the body).

Cisapride is a gastroprokinetic agent, a drug that increases motility in the upper gastrointestinal tract. It acts directly as a serotonin 5-HT₄ receptor agonist and indirectly as a parasympathomimetic. Stimulation of the serotonin receptors increases acetylcholine release in the enteric nervous system. It has been sold under the trade names Prepulsid (Janssen-Ortho) and Propulsid (in the United States). It was discovered by Janssen Pharmaceutica in 1980. In many countries, it has been either withdrawn from the market or had its indications limited due to incidences of serious cardiac side-effects.

The commercial preparations of this drug are the racemic mixture of both enantiomers of the compound. The (+) enantiomer itself has the major pharmacologic effects and does not induce many of the detrimental side-effects of the mixture.

As a vermicide, albendazole causes degenerative alterations in the intestinal cells of the worm by binding to the colchicine-sensitive site of β-tubulin, thus inhibiting its polymerization or assembly into microtubules (it binds much better to the β-tubulin of parasites than that of mammals). Albendazole leads to impaired uptake of glucose by the larval and adult stages of the susceptible parasites, and depletes their glycogen stores. Albendazole also prevents the formation of spindle fibers needed for cell division, which in turn blocks egg production and development; existing eggs are prevented from hatching.Cell motility, maintenance of cell shape, and intracellular transport are also disrupted. At higher concentrations, it disrupts the helminths' metabolic pathways by inhibiting metabolic enzymes such as malate dehydrogenase and fumarate reductase, with inhibition of the latter leading to less energy produced by the Krebs cycle.Due to diminished ATP production, the parasite is immobilized and eventually dies.

Some parasites have evolved to have some resistance to albendazole by having a different set of acids comprising β-tubulin, decreasing the binding affinity of albendazole.Drosophilia have many of the same mutations, meaning the drug does not affect fruit flies.

Posaconazole, sold under the brand names Noxafil and Posanol is a triazole antifungal medication.

It was approved for medical use in the United States in September 2006, and is available as a generic medication.

Valganciclovir is a prodrug for ganciclovir, which is a synthetic analog of 2′-deoxy-guanosine. Its structure is the same as ganciclovir, except for the addition of a L-valyl ester at the 5' end of the incomplete deoxyribose ring. The valine increases both the absorption of the drug in the intestines, as well as the bioavailability of the drug once it is absorbed. The L-valyl ester is cleaved by esterases in the intestines and the liver, leaving ganciclovir to be absorbed by the virus-infected cells.

Ganciclovir is first phosphorylated to ganciclovir monophosphate by a viral thymidine kinase encoded by the cytomegalovirus (CMV) upon infection. Human cellular kinases further phosphorylate the molecule to create ganciclovir diphosphate, then ganciclovir triphosphate. These kinases are present in 10-fold greater concentrations in CMV or herpes simplex virus (HSV)-infected cells compared to uninfected human cells, allowing ganciclovir triphosphate to concentrate in infected cells.

Ganciclovir triphosphate is a competitive inhibitor of deoxyguanosine triphosphate (dGTP). It is incorporated into viral DNA and preferentially inhibits viral DNA polymerases more than cellular DNA polymerases. Ganciclovir triphosphate serves as a poor substrate for chain elongation. Once incorporated into viral DNA due to its structure similarity to dGTP, chain termination occurs once a single nucleotide is added to the distal hydroxyl group of the incomplete deoxyribose ring of ganciclovir.

Linezolid is an antibiotic used for the treatment of infections caused by Gram-positive bacteria that are resistant to other antibiotics. Linezolid is active against most Gram-positive bacteria that cause disease, including streptococci, vancomycin-resistant enterococci (VRE), and methicillin-resistant Staphylococcus aureus (MRSA). The main uses are infections of the skin and pneumonia although it may be used for a variety of other infections including drug-resistant tuberculosis.It is used either by injection into a vein or by mouth.

When given for short periods, linezolid is a relatively safe antibiotic. It can be used in people of all ages and in people with liver disease or poor kidney function.

Piperacillin is a broad-spectrum β-lactam antibiotic of the ureidopenicillin class. The chemical structure of piperacillin and other ureidopenicillins incorporates a polar side chain that enhances penetration into gram-negative bacteria and reduces susceptibility to cleavage by gram-negative beta lactamase enzymes. These properties confer activity against the important hospital pathogen Pseudomonas aeruginosa. Thus piperacillin is sometimes referred to as an "anti-pseudomonal penicillin".

When used alone, piperacillin lacks strong activity against the gram-positive pathogens such as Staphylococcus aureus, as the beta-lactam ring is hydrolyzed by the bacteria's beta-lactamase.

Tazobactam is a pharmaceutical drug that inhibits the action of bacterial β-lactamases, especially those belonging to the SHV-1 and TEM groups. It is commonly used as its sodium salt, tazobactam sodium. In simple terms, it is an ingredient that can be added to certain antibiotics to make them less vulnerable to bacteria's antimicrobial resistance.

Tazobactam is combined with the extended spectrum β-lactam antibiotic piperacillin in the drug piperacillin/tazobactam, used in infections due to Pseudomonas aeruginosa. Tazobactam broadens the spectrum of piperacillin by making it effective against organisms that express β-lactamase and would normally degrade piperacillin.

Tazobactam is a heavily modified penicillin and a sulfone

Tapentadol, brand names Nucynta among others, is a centrally acting opioid analgesic of the benzenoid class with a dual mode of action as an agonist of the μ-opioid receptor and as a norepinephrine reuptake inhibitor (NRI). Analgesia occurs within 32 minutes of oral administration, and lasts for 4–6 hours.

It is similar to tramadol in its dual mechanism of action; namely, its ability to activate the mu opioid receptor and inhibit the reuptake of norepinephrine. Unlike tramadol, it has only weak effects on the reuptake of serotonin and is a significantly more potent opioid with no known active metabolites Tapentadol is not a pro-drug and therefore does not rely on metabolism to produce its therapeutic effects; this makes it a useful moderate-potency analgesic option for patients who do not respond adequately to more commonly used opioids due to genetic disposition (poor metabolizers of CYP3A4 and CYP2D6), as well as providing a more consistent dosage-response range among the patient population.

The potency of tapentadol is somewhere between that of tramadol and morphine, with an analgesic efficacy comparable to that of oxycodone despite a lower incidence of side effects. It is generally regarded as a weak-moderate strength opioid (a category shared by many better-known opioids such as hydrocodone and pethidine).

Carvedilol is both a non-selective beta adrenergic receptor blocker (β1, β2) and an alpha adrenergic receptor blocker (α1). The S(-) enantiomer accounts for the beta blocking activity whereas the S(-) and R(+) enantiomer have alpha blocking activity.

Carvedilol reversibly binds to beta adrenergic receptors on cardiac myocytes. Inhibition of these receptors prevents a response to the sympathetic nervous system, leading to decreased heart rate and contractility. This action is beneficial in heart failure patients where the sympathetic nervous system is activated as a compensatory mechanism.

Carvedilol blockade of α1 receptors causes vasodilation of blood vessels. This inhibition leads to decreased peripheral vascular resistance and an antihypertensive effect. There is no reflex tachycardia response due to carvedilol blockade of β1 receptors on the heart.

Icatibant, sold under the brand name Firazyr, is a medication for the symptomatic treatment of acute attacks of hereditary angioedema (HAE) in adults with C1-esterase-inhibitor deficiency.It is not effective in angioedema caused by medication from the ACE inhibitor class.

It is a peptidomimetic consisting of ten amino acids, which is a selective and specific antagonist of bradykinin B2 receptors. It cost about US$8,000 to 9,000 per dose as of 2014.

miquimod yields profound antitumoral activity by acting on several immunological levels synergistically.^[9] Imiquimod stimulates the innate immune system by activating toll-like receptor 7 (TLR7), commonly involved in pathogen recognition.Cells activated by imiquimod via TLR-7 secrete cytokines (primarily interferon-α (IFN-α), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α)).There is evidence that imiquimod, when applied to skin, can lead to the activation of Langerhans cells, which subsequently migrate to local lymph nodes to activate the adaptive immune system. Other cell types activated by imiquimod include natural killer cells, macrophages and B-lymphocytes.

Imiquimod exerts its effect by increasing levels of the opioid growth factor receptor (OGFr). In experiments, blocking OGFr function with siRNA technology resulted in loss of any antiproliferative effect of imiquimod.

Levosalbutamol, also known as levalbuterol, is a short-acting β₂ adrenergic receptor agonist used in the treatment of asthma and chronic obstructive pulmonary disease (COPD). Evidence does not show that levosalbutamol works better than salbutamol; thus there may not be sufficient justification for prescribing it.

The drug is the (R)-(−)-enantiomer of its prototype drug salbutamol.

Activation of β₂ adrenergic receptors on airway smooth muscle leads to the activation of adenylate cyclase and to an increase in the intracellular concentration of 3',5'-cyclic adenosine monophosphate (cyclic AMP). The increase in cyclic AMP is associated with the activation of protein kinase A, which in turn, inhibits the phosphorylation of myosin and lowers intracellular ionic calcium concentrations, resulting in muscle relaxation.

Levosalbutamol relaxes the smooth muscles of all airways, from the trachea to the terminal bronchioles. Increased cyclic AMP concentrations are also associated with the inhibition of the release of mediators from mast cells in the airways. Levosalbutamol acts as a functional agonist that relaxes the airway irrespective of the spasmogen involved, thereby protecting against all bronchoconstrictor challenges.

While it is recognized that β₂ adrenergic receptors are the predominant receptors on bronchial smooth muscle, data indicate that there are beta receptors in the human heart, 10–50% of which are β₂ adrenergic receptors. The precise function of these receptors has not been established. However, all β adrenergic agonist drugs can produce a significant cardiovascular effect in some patients, as measured by pulse rate, blood pressure, and restlessness symptoms, and/or electrocardiographic (ECG).