U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

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Showing 10421 - 10430 of 12523 results

Amlodipine is a dihydropyridine calcium antagonist (calcium ion antagonist or slow-channel blocker) that inhibits the transmembrane influx of calcium ions into vascular smooth muscle and cardiac muscle. Experimental data suggest that amlodipine binds to both dihydropyridine and nondihydropyridine binding sites. The contractile processes of cardiac muscle and vascular smooth muscle are dependent upon the movement of extracellular calcium ions into these cells through specific ion channels. Amlodipine inhibits calcium ion influx across cell membranes selectively, with a greater effect on vascular mooth muscle cells than on cardiac muscle cells. Amlodipine is indicated for the treatment of hypertension and coronary artery disease.
Amlodipine is a dihydropyridine calcium antagonist (calcium ion antagonist or slow-channel blocker) that inhibits the transmembrane influx of calcium ions into vascular smooth muscle and cardiac muscle. Experimental data suggest that amlodipine binds to both dihydropyridine and nondihydropyridine binding sites. The contractile processes of cardiac muscle and vascular smooth muscle are dependent upon the movement of extracellular calcium ions into these cells through specific ion channels. Amlodipine inhibits calcium ion influx across cell membranes selectively, with a greater effect on vascular mooth muscle cells than on cardiac muscle cells. Amlodipine is indicated for the treatment of hypertension and coronary artery disease.
Mitoxantrone (NOVANTRONE) is a synthetic antineoplastic anthracenedione. Mitoxantrone, a DNA-reactive agent that intercalates into deoxyribonucleic acid (DNA) through hydrogen bonding, causes crosslinks and strand breaks. Mitoxantrone also interferes with ribonucleic acid (RNA) and is a potent inhibitor of topoisomerase II, an enzyme responsible for uncoiling and repairing damaged DNA. It has a cytocidal effect on both proliferating and nonproliferating cultured human cells, suggesting lack of cell cycle phase specificity. Mitoxantrone has been shown in vitro to inhibit B cell, T cell, and macrophage proliferation and impair antigen pre sentation, as well as the secretion of interferon gamma, TNFα, and IL-2. NOVANTRONE is indicated for reducing neurologic disability and/or the frequency of clinical relapses in patients with secondary (chronic) progressive, progressive relapsing, or worsening relapsing-remitting multiple sclerosis (i.e., patients whose neurologic status is significantly abnormal between relapses). NOVANTRONE in combination with corticosteroids is indicated as initial chemotherapy for the treatment of patients with pain related to advanced hormone-refractory prostate cancer. NOVANTRONE in combination with other approved drug(s) is indicated in the initial therapy of acute nonlymphocytic leukemia (ANLL) in adults. This category includes myelogenous, promyelocytic, monocytic, and erythroid acute leukemias.
Etiguanfacine, also known as SSP-1871, is an α2-adrenoreceptor agonist.
Flurbiprofen, a propionic acid derivative, is a nonsteroidal anti-inflammatory drug that exhibits antiinflammatory, analgesic, and antipyretic activities in animal models. Flurbiprofen Tablets are indicated for relief of the signs and symptoms of rheumatoid arthritis and for relief of the signs and symptoms of osteoarthritis. It may also be used to treat pain associated with dysmenorrhea and mild to moderate pain accompanied by inflammation (e.g. bursitis, tendonitis, soft tissue trauma). Flurbiprofen may also be used topically prior to ocular surgery to prevent or reduce intraoperative miosis. Similar to other NSAIAs, the anti-inflammatory effect of flurbiprofen occurs via reversible inhibition of cyclooxygenase (COX), the enzyme responsible for the conversion of arachidonic acid to prostaglandin G2 (PGG2) and PGG2 to prostaglandin H2 (PGH2) in the prostaglandin synthesis pathway. This effectively decreases the concentration of prostaglandins involved in inflammation, pain, swelling and fever. Flurbiprofen is a non-selective COX inhibitor and inhibits the activity of both COX-1 and -2. It is also one of the most potent NSAIAs in terms of prostaglandin inhibitory activity.

Class (Stereo):
CHEMICAL (ACHIRAL)


Conditions:

Alfentanil is an opioid analgesic with a rapid onset of action. Alfentanil interacts predominately with the opioid mu-receptor. These mu-binding sites are discretely distributed in the human brain, spinal cord, and other tissues. In clinical settings, alfentanil exerts its principal pharmacologic effects on the central nervous system. Its primary actions of therapeutic value are analgesia and sedation. Alfentanil may increase the patient's tolerance for pain and decrease the perception of suffering, although the presence of the pain itself may still be recognized. In addition to analgesia, alterations in mood, euphoria and dysphoria, and drowsiness commonly occur. Alfentanil depresses the respiratory centers, depresses the cough reflex, and constricts the pupils. Alfentanil, marketed under the trade name Alfenta, Rapifen in Australia is indicated for the management of postoperative pain and the maintenance of general anesthesia.

Class (Stereo):
CHEMICAL (ACHIRAL)


Conditions:

Alfentanil is an opioid analgesic with a rapid onset of action. Alfentanil interacts predominately with the opioid mu-receptor. These mu-binding sites are discretely distributed in the human brain, spinal cord, and other tissues. In clinical settings, alfentanil exerts its principal pharmacologic effects on the central nervous system. Its primary actions of therapeutic value are analgesia and sedation. Alfentanil may increase the patient's tolerance for pain and decrease the perception of suffering, although the presence of the pain itself may still be recognized. In addition to analgesia, alterations in mood, euphoria and dysphoria, and drowsiness commonly occur. Alfentanil depresses the respiratory centers, depresses the cough reflex, and constricts the pupils. Alfentanil, marketed under the trade name Alfenta, Rapifen in Australia is indicated for the management of postoperative pain and the maintenance of general anesthesia.
Leuprolide acetate is a synthetic nonapeptide analog of naturally occurring gonadotropin-releasing hormone (GnRH or LH-RH). The analog possesses greater potency than the natural hormone. It acts primarily on the anterior pituitary, inducing a transient early rise in gonadotrophin release. With continued use, leuprorelin causes pituitary desensitisation and/or down-regulation, leading to suppressed circulating levels of gonadotrophins and sex hormones. Leuprolide acetate used to treat a wide range of sex hormone-related disorders including advanced prostatic cancer, uterine leiomyomata (fibroids), endometriosis and precocious puberty.
Leuprolide acetate is a synthetic nonapeptide analog of naturally occurring gonadotropin-releasing hormone (GnRH or LH-RH). The analog possesses greater potency than the natural hormone. It acts primarily on the anterior pituitary, inducing a transient early rise in gonadotrophin release. With continued use, leuprorelin causes pituitary desensitisation and/or down-regulation, leading to suppressed circulating levels of gonadotrophins and sex hormones. Leuprolide acetate used to treat a wide range of sex hormone-related disorders including advanced prostatic cancer, uterine leiomyomata (fibroids), endometriosis and precocious puberty.
Sulconazole (trade name Exelderm) is an antifungal medication of the imidazole class. Sulconazole has a broad spectrum of antifungal activity in vitro and has been shown to be an effective topical antifungal agent for the management of superficial fungal infections of the skin, particularly dermatophytosis and tinea versicolor. Sulconazole inhibits the cytochrome P-450 isoenzyme, C-14-alpha-demethylase by binding to the heme iron of the enzyme. This results in a largely fungistatic effect. The selectivity of azole antifungal agents for pathogenic organisms compared with mammalian cells appears to depend on a preferred affinity of these drugs for fungal versus mammalian cytochrome P-450 sterol demethylases. Enzyme inhibition by sulconazole prevents the synthesis of ergosterol, a sterol found in fungal cell membranes but, in general, not in mammalian cell membranes. Additionally, lanosterol accumulates, which changes membrane permeability, cell volume, secondary metabolic effects, and causes defective cell division and growth inhibition. As sulconazole is primarily fungistatic, an intact immune system may be needed for infection resolution.In selected situations, sulconazole may have growth phase-dependent fungicidal activity against very susceptible organisms. The 1% concentration of sulconazole may greatly exceed the minimum inhibitory concentration and exert a direct physiochemical effect on the fungal cell membrane. The fungicidal effect may be due to hydrophobic interactions between sulconazole and unsaturated fatty acids in the membrane. Mammalian cells generally have little or no unsaturated fatty acids. Sulconazole may also prevent DNA and RNA synthesis and increase their degradation.Sulconazole has activity against many dermatophytes and yeast. One measure of the drug's antifungal activity is the relative inhibition factor (RIF). The RIF approaches 0% for a drug to which a fungus is highly sensitive and 100% for a drug that is non-inhibitory. The RIF values of sulconazole for Candida species, Aspergillus species, and dermatophytes are broadly similar to those of clotrimazole, econazole, ketoconazole, miconazole, and tioconazole. The mean RIF values were 69% (30—98%) for Candida species, 71% (61—82%) for Aspergillus species, and 12% (5—18%) for dermatophytes. Sulconazole is available as a cream or solution to treat skin infections such as athlete's foot, ringworm, jock itch, and sun fungus.

Showing 10421 - 10430 of 12523 results