Manual of Drug Interaction Principles for Medical Practice: The P450 System (Concise Guides)

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Cimetidine was discovered in and came into commercial use in Cimetidine is used to inhibit stomach acid production and is used in the treatment of heartburn and peptic ulcers. Some evidence suggests cimetidine could be effective in the treatment of common warts, but more rigorous double-blind clinical trials found it to be no more effective than a placebo.


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Tentative evidence supports a beneficial role as add-on therapy in colorectal cancer. Cimetidine inhibits ALA synthase activity and hence may have some therapeutic value in preventing and treating acute porphyria attacks. Reported side effects of cimetidine include diarrhea , rashes , dizziness , fatigue , constipation , and muscle pain , all of which are usually mild and transient. Cimetidine appears to be very safe in overdose , producing no symptoms even with massive overdoses e.

Due to its non-selective inhibition of cytochrome P enzymes , cimetidine has numerous drug interactions. Examples of specific interactions include the following:. The mechanism of action of cimetidine as an antacid is as a histamine H 2 receptor antagonist.

Kundrecensioner

Cimetidine is reported to be a competitive and reversible inhibitor of several CYP enzymes, [23] [30] [35] [40] although mechanism-based suicide irreversible inhibition has also been identified for cimetidine's inhibition of CYP2D6. Cimetidine has been found to possess weak antiandrogenic activity at high doses. At typical therapeutic levels, cimetidine has either no effect on or causes small increases in circulating testosterone concentrations in men.

In accordance with the very weak nature of its AR antagonistic activity, cimetidine has shown minimal effectiveness in the treatment of androgen-dependent conditions such as acne , hirsutism excessive hair growth , and hyperandrogenism high androgen levels in women. Cimetidine is rapidly absorbed regardless of route of administration. Cimetidine, approved by the FDA for inhibition of gastric acid secretion, has been advocated for a number of dermatological diseases. Black , C.

Cimetidine

Robin Ganellin , and others to develop a histamine receptor antagonist to suppress stomach acid secretion. Sir James W. Black shared the Nobel Prize in Physiology or Medicine for the discovery of propranolol and also is credited for the discovery of cimetidine. At the time , histamine was known to stimulate the secretion of stomach acid, but also that traditional antihistamines had no effect on acid production. Hundreds of modified compounds were synthesized in an effort to develop a model of the receptor.

Concise Guide to Drug Interaction Princi,

From this lead, the receptor model was further refined and eventually led to the development of burimamide , the first H 2 receptor antagonist. Burimamide was still insufficiently potent for oral administration, and further modification of the structure, based on modifying the pKa of the compound, led to the development of metiamide.

Metiamide was an effective agent; it was associated, however, with unacceptable nephrotoxicity and agranulocytosis. The compound was synthesized in and evaluated for toxicology by It passed all trials. Cimetidine was first marketed in the United Kingdom in , and in the U.

References

By , Tagamet was being sold in more than countries and became the top-selling prescription product in the U. The commercial name "Tagamet" was decided upon by fusing the two words "an tag onist" and "ci met idine". Tagamet has now been largely replaced by the proton pump inhibitors for treating peptic ulcers, but is now available as an over-the-counter medicine for heartburn in many countries.

From Wikipedia, the free encyclopedia. IUPAC name. Interactive image. Main article: H2 antagonist. Pharmacology in Anesthesia Practice. Oxford University Press.

The Effect of Cytochrome P450 Metabolism on Drug Response, Interactions, and Adverse Effects

Leikin; Frank P. Paloucek Lexi-Comp, Incorporated. Pharmacology and Therapeutics for Dentistry - E-Book. Elsevier Health Sciences. Academic Press. Davis's Drug Guide for Nurses. January Lehne's Pharmacology for Nursing Care. National Institute for health and Care Excellence. Analogue-based Drug Discovery II. Robin Analogue-based Drug Discovery. The Annals of Pharmacotherapy. Each case is thoroughly referenced and depicts real clinical events. Many are direct narrations from patients of the author or his colleagues, with identifiers subtly altered to ensure confidentiality.

Author: Cozza, Kelly L.

Others are constructed around well-known, accepted, and multiply-verified interactions. The introductory chapter reviews core concepts and summarizes the P system, phase II glucuronidation and P-glycoproteins. Subsequent chapters are organized by the nature of the metabolic processes that account for the depicted drug interactions. OncologyChapter PsychiatryChapter GuidelinesChapter Du kanske gillar.

Pharmacokinetics Made Simple

Lifespan David Sinclair Inbunden. Spara som favorit. Skickas inom vardagar. There are several reasons these numbers have increased.


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  • Use of Drugs that Act on the Cytochrome P System in the Elderly;
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  • First, many new medications have been brought to market in recent years. Second, advances in medical care have resulted in increased longevity and more elderly patients than ever before -- patients who are more likely to be following polypharmacy regimens. Population patterns in the U. Fortunately, drug interactions can be prevented with access to current, comprehensive, reliable information, and the Clinical Manual of Drug Interaction Principles for Medical Practice provides just that in a user-friendly format psychiatry clinicians including residents and nurses and forensics experts will find indispensable.

    With this new edition, the book has evolved from "Concise Guide" to "Clinical Manual" and offers the expanded coverage and features healthcare providers need to keep up with this critical field.