Absorption interactions. Medical search. Frequent questions

Most of the important drug interactions result from a change in the absorption, metabolism, or elimination of a drug. (rxlist.com)
Most drug interactions with ARV drugs are mediated through inhibition or induction of hepatic drug metabolism. (medscape.com)
Other pharmacodynamic and pharmacokinetic mechanisms of interactions (eg, alteration of gastric pH, UGT1A1 metabolism) can affect ARVs. (medscape.com)
Recent findings that the widely-used herbal supplement Saint John's wort could dramatically affect the absorption and metabolism of many prescription and non-prescription drugs raised concerns that other popular herbal supplements might cause similar changes, thus significantly altering drugs, therapeutic or toxic effects. (news-medical.net)
The prescription drug cocktail was again administered and blood and urine samples taken in order to determine the absorption and metabolism of these drugs in the presence of either or both of the herbal supplements. (news-medical.net)

In spectroscopy, collision-induced absorption and emission refers to spectral features generated by inelastic collisions of molecules in a gas. (wikipedia.org)
Collision-induced absorption and emission is distinguished from collisional broadening in spectroscopy in that collisional broadening comes from elastic collisions of molecules, whereas collision-induced absorption and emission is an inherently inelastic process. (wikipedia.org)
Here we outline the very different spectra of complexes consisting of two or more interacting atoms or molecules: the "interaction-induced" or "collision-induced" spectroscopy. (wikipedia.org)
We will therefore apply our standard UHV surface science techniques available to us such as Scanning Tunnelling Microscopy (STM), High Resolution Core Level Spectroscopy (HRCLS), Low-Energy Electron Diffraction (LEED), SXRD, Near-Edge X-ray Absorption Fine Structure spectroscopy (NEXAFS), Temperature-Programmed Desorption (TPD) and Reflection Absorption Infra-Red Spectroscopy (RAIRS) before entering the realm of operando environments. (lu.se)
The interaction of this complex with DNA and bovine serum albumin (BSA) was investigated by UV-vis and fluorescence spectroscopy. (bvsalud.org)

Milk and other dairy products, antacids containing polyvalent cations, as well as various iron salts ingested simultaneously with tetracycline derivatives, might interfere with their absorption by 50 to 90% or even more. (nih.gov)
Many medications interfere with the body's absorption and use of folic acid. (encyclopedia.com)
In addition, zinc may also interfere with the absorption of cephalexin or ceftibuten. (who.int)
Zinc may interfere with the absorption of copper, leading to reduced copper levels, and potentially copper deficiency. (who.int)

The pharmacokinetic interactions in absorption of tetracyclines likely to be clinically significant in cases where the infecting pathogens are moderately resistant to tetracyclines and relatively high serum concentrations are needed for proper bacteriostasis. (nih.gov)
The possibility of these pharmacodynamic, as opposed to pharmacokinetic, interactions remains to be investigated. (news-medical.net)

J. Bornacelli, C. Torres-Torres, B. Can-Uc, R. Rangel-Rojo, and A. Oliver, "Plasmon coupling interactions and inhibition of nonlinear absorption in a complex system with Ag and Pt nanoparticles in silica," Appl. (optica.org)
9. Inhibition of food iron absorption by coffee. (lifehack.org)
10. Inhibition of non-haem iron absorption in man by polyphenolic-containing beverages. (lifehack.org)

According to the latest research from the medical community [ 1 ], some vitamins and minerals, like calcium and iron, can inhibit absorption of each other up to five fold [2]. (lifehack.org)
Calcium and iron can inhibit absorption of each other up to five-fold and are best taken at different times of day [2]. (lifehack.org)
Polyphenols in many beverages greatly inhibit absorption of vitamins and minerals [9,10]. (lifehack.org)
Zinc may inhibit the absorption of copper (see section 4.3). (who.int)

We were and are fully aware of the fact that aromatic molecules like pyridine and pyrazine adsorbed in a flat geometry on the metal surface as discussed in our Letter [1] are not necessarily in the ground-state configuration and showed that in this case the van der Waals interaction plays a crucial role. (irb.hr)
The results of experimental and theoretical data showed that the interaction between the yttrium complex and DNA and BSA is driven by the hydrogen bond and van der Waals interaction, respectively. (bvsalud.org)

The severity of interaction depends both on the nature of the tetracycline derivative and of the cation, on the doses used, on pharmaceutical factors, and on time schedules in dosing. (nih.gov)
Reduces tetracycline absorption. (empr.com)

How do drug interactions occur? (rxlist.com)
Drug interactions also may occur when two drugs that have similar (additive) effects or opposite (canceling) effects on the body are administered together. (rxlist.com)
Most drug interactions that are due to altered absorption occur in the intestine. (rxlist.com)
Thus, the interactions are evaluated in a qualitative manner to provide a sense of what influence the interactions may have when they do occur. (cdc.gov)
Collision-induced absorption (CIA) and emission (CIE) spectra are well known in the microwave and infrared regions of the electromagnetic spectrum, but they occur in special cases also in the visible and near ultraviolet regions. (wikipedia.org)
The predictions indicate that hot-spot formation is accelerated by higher absorption coefficients and by localized plastic deformations that occur in areas of significant laser heating. (ncsu.edu)
What drug interactions occur with chamomile? (msdmanuals.com)

Hackam, DJ 2012, ' Guts, germs and glucose: Understanding the effects of prematurity on the interaction between bacteria and nutrient absorption across the intestine ', British Journal of Nutrition , vol. 108, no. 4, pp. 571-573. (johnshopkins.edu)

In particular, we report absorption, scattering, and extinction cross sections of a hybrid core-shell system and identify several important interaction regimes that are determined by the electromagnetic field enhancement and the oscillator strength of electronic excitations. (chalmers.se)
Laser interaction effects of electromagnetic absorption and microstructural defects on hot-spot formation in RDX-PCTFE energetic aggregates. (ncsu.edu)
The effects of the electromagnetic absorption coefficient coupled with void distribution and spacing, grain morphology, crystal–binder interactions and dislocation densities were analyzed to determine their influence on the time, location and mechanisms of hot-spot formation. (ncsu.edu)

Whenever two or more drugs are being taken, there is a chance that there will be an interaction among the drugs. (rxlist.com)
The interaction may increase or decrease the effectiveness of the drugs or the side effects of the drugs. (rxlist.com)
The likelihood of drug interactions increases as the number of drugs being taken increases. (rxlist.com)
Therefore, people who take several drugs are at the greatest risk for interactions. (rxlist.com)
This definition applies to interactions of drugs with other drugs (drug-drug interactions), as well as drugs with food (drug-food interactions) and other substances. (rxlist.com)
There are various potential mechanisms through which the absorption of drugs can be reduced. (rxlist.com)
There are various ways that the absorption of drugs can be reduced. (hdkino.org)
Any time a new medication is prescribed, including antimalarial drugs, check for known or possible drug interactions (see Table 2-05 ) and inform the traveler of potential risks. (cdc.gov)
Transporters aid hepatic, renal, and biliary clearance of drugs and may be susceptible to drug interactions. (medscape.com)
Antiepileptic drugs should be used carefully, with consideration of medication interactions and potential side effects. (medscape.com)
He does note, however, that the team did not investigate any possible effects of the herbal supplements on pharmacodynamic interactions: the way drugs produce desired therapeutic effects or cause adverse side effects. (news-medical.net)
Chamomile may reduce the absorption of some drugs taken by mouth. (msdmanuals.com)
Chamomile may also increase the effects of drugs that prevent blood clots (anticoagulants) and sedatives (including alcohol) and decrease the absorption of iron supplements. (msdmanuals.com)

3. Effect of ascorbic acid intake on nonheme-iron absorption from a complete diet. (lifehack.org)
EVALUATION FOR ACCEPTABLE INTAKE BIOLOGICAL DATA Biochemical aspects Absorption, distribution and excretion The absorption, distribution, and excretion of paraquat in experimental animals have been reviewed by WHO (1984). (inchem.org)

2. Calcium supplementation: effect on iron absorption. (lifehack.org)
Prednisone has been clinically proven to impair calcium absorption and bone formation. (naturalnews.com)
1 Gennari C, Differential effect of glucocorticoids on calcium absorption and bone mass, Br J Rheumatol, 1993, 32 (suppl 2):11-4. (naturalnews.com)
The absorption of zinc may be reduced by calcium salts. (who.int)

An interval of 3 hours between the ingestion of tetracyclines and cations prevents the interaction. (nih.gov)
When taken together, zinc may reduce the absorption of tetracyclines (but not doxycycline) and quinolone antibacterials. (who.int)

This reduces their absorption or speeds their elimination. (hopkinsmedicine.org)

For more information regarding specific drug interactions, see the Medscape Drug Interaction Checker or the NIH Guidelines for the Use of Antiretroviral Agents in HIV-1-Infected Adults and Adolescents . (medscape.com)

This paper presents an update overview of clinical findings regarding herb-warfarin interaction, highlighting clinical outcomes, severity of documented interactions, and quality of clinical evidence. (hindawi.com)

Antacids lower the absorption of this medication. (webmd.com)

Such inelastic collisions (along with the absorption or emission of photons) may induce quantum transitions in the molecules, or the molecules may form transient supramolecular complexes with spectral features different from the underlying molecules. (wikipedia.org)

Drug-nutrient interactions. (naturalnews.com)

Read directions, warnings, and interaction precautions printed on all medicine labels and instructions. (hopkinsmedicine.org)
The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. (cigna.com)

We present a detailed Mie theory, finite-difference time-domain, and quasi-static study of plasmon-exciton interactions in a spherical core shell geometry. (chalmers.se)
We assign these regimes to enhanced-absorption, exciton-induced transparency and strong coupling, depending on the nature of the observed spectra of the coupled plasmon-exciton resonances. (chalmers.se)
Surface plasmon resonance imaging (SPRi) brings label-free detection of molecular interactions to microarray analysis. (genengnews.com)

A detailed review of concomitant medications can help in creating a regimen that minimizes undesirable interactions. (medscape.com)

The general mechanism of herb-warfarin interaction almost remains unknown, yet several pharmacokinetic and pharmacodynamic factors were estimated to influence the effectiveness of warfarin. (hindawi.com)

When you're done, check for possible drug interactions. (rxlist.com)
This tool may not cover all possible drug interactions. (rxlist.com)

The drug interaction between warfarin (Coumadin) and vitamin K-containing products is a good example of this type of interaction. (rxlist.com)
In summary, herb-warfarin interaction, especially the clinical effects of herbs on warfarin therapy should be further investigated through multicenter studies with larger sample sizes. (hindawi.com)
Herbal medicines and food interaction are now cited as the main cause of adverse events with warfarin. (hindawi.com)
A literature survey over the herb-drug interactions in clinical cases showed that warfarin accounted for 34 of the total 133 cases of interactions, making itself the most frequently involved drug in herb-drug interactions [ 6 ]. (hindawi.com)
The incidence of interaction between herbs and warfarin is not yet fully known, and there is no body of reliable information currently available to draw upon when assessing the scale of any possible problem or predicting clinical outcomes. (hindawi.com)
In absence of good evidence, speculation has taken its place, and poor quality of available information in turn restricts future study of herb-warfarin interaction. (hindawi.com)
Herb-warfarin interaction has considerable clinical significance, so it is especially necessary to identify the herbs that interact with warfarin. (hindawi.com)

Having reinterpreted the physical origin of the features in the absorption and emission spectra of P3HT, we then model these spectra and show how they evolve as the degree of order in the polymer is changed by varying several physical parameters including temperature and regioregularity of the polymer. (ep2-bayreuth.de)
Collision-induced absorption and emission is particularly important in dense gases, such as hydrogen and helium clouds found in astronomical systems. (wikipedia.org)
Both ordinary and collision-induced spectra may be observed in emission and absorption and require an electric or magnetic multipole moment - in most cases an electric dipole moment - to exist for an optical transition to take place from an initial to a final quantum state of a molecule or a molecular complex. (wikipedia.org)
Repulsion and attraction are due, respectively, to the small defects or excesses of electron densities of molecular complexes in the space between the interacting molecules, which often result in interaction-induced electric dipole moments that contribute some to interaction-induced emission and absorption intensities. (wikipedia.org)
This can be accomplished, e.g., by absorption lines such as the one from oxygen at 760 nm or by fluorescence emission such as that from Chlorophyll around 735 nm. (lu.se)

Alcohol can change medicine absorption and may increase or decrease the effectiveness of many medicines. (hopkinsmedicine.org)

The purpose of an Interaction Profile is to evaluate data on the toxicology of the "whole" priority mixture (if available) and on the joint toxic action of the chemicals in the mixture in order to recommend approaches for the exposure-based assessment of the potential hazard to public health. (cdc.gov)
The weight-of evidence evaluations are qualitative in nature, although ATSDR recognizes that observations of toxicological interactions depend greatly on exposure doses and that some interactions appear to have thresholds. (cdc.gov)
Carbon monoxide, formaldehyde, methylene chloride, nitrogen dioxide, and tetrachloroethylene were chosen as the subject for this interaction profile based on the likelihood of co-exposure to these chemicals in the home. (cdc.gov)

During pretravel consultations, travel health providers must consider potential interactions between vaccines and medications, including those already taken by the traveler. (cdc.gov)

The molecular docking method was used to confirm the experimental results, investigate the type of interaction, and determine the binding site. (bvsalud.org)

Herbs were also classified on account of the likelihood of their supporting evidences for interaction. (hindawi.com)

A drug interaction can be defined as an interaction between a drug and another substance that prevents the drug from performing as expected. (rxlist.com)
Drug absorption also can be affected if the drug's ability to dissolve (solubility) is changed by another drug or if a substance (for example, food) binds to the drug and prevents its absorption. (rxlist.com)

On the other end of the spectrum there are vitamins such as iron and vitamin C that work in synergy with one another, and taking them together improves absorption [3]. (lifehack.org)
Until now, most people have lacked the proper information about vitamin interactions. (lifehack.org)
Vitamin C greatly improves iron absorption. (lifehack.org)
6. Influence of dietary fat on beta-carotene absorption and bioconversion into vitamin A. Nutr Rev. (lifehack.org)

Less appreciated is the fact that SPRi systems provide real-time data, which enables the user to monitor the progress of binding without disturbing molecular interactions. (genengnews.com)

Drug interactions contribute to the cost of healthcare because of the costs of medical care that are required to treat problems caused by changes in effectiveness or side effects. (rxlist.com)
Drug interactions can change how medicines work or increase risk for side effects. (cigna.com)

The role of drug transporters is evolving, revealing more drug interactions. (medscape.com)
The influence of drug transporters on drug-drug interactions is complex and requires further understanding. (medscape.com)
The interactions of two antiviral, acyclic nucleoside phosphonates, adefovir and cidofovir, with xenobiotic transporters was studied in intact killifish ( Fundulus heteroclitus ) renal proximal tubules by using fluorescent substrates, confocal microscopy, and quantitative image analysis. (aspetjournals.org)

Iron absorption can be inhibited by polyphenols in beverages, thus iron supplements should be taken with water or juice. (lifehack.org)
The absorption of zinc may be reduced by oral iron, also the absorption of oral iron may be reduced by zinc. (who.int)

Four different mechanisms for hot-spot initiation under dynamic laser and pressure loads were identified, which depend on the localization of plastic shear strain and laser heat absorption within the aggregate. (ncsu.edu)
Based on limited literature and information reported, we identified corresponding mechanisms of interactions for a small amount of "interacting herbs. (hindawi.com)
[ 1 ] The mechanisms of drug interactions with each ARV are briefly mentioned below. (medscape.com)

This medicine can reduce the absorption of other medicines. (cigna.com)
Medicines that reduce the absorption of zinc such as pencillamine should not be taken together with [DI014 trade name]. (who.int)

Ashworth, AJ & Price, GJ 1985, ' Interaction parameters and miscibility limits of poly(dimethylsiloxane) and dinonyl phthalate or squalane determined from studies of the absorption of hexane by the binary liquid mixtures ', Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases , vol. 81, no. 2, pp. 473-483. (bath.ac.uk)

Food-medicine interactions can happen with both prescription and over-the-counter (OTC) medicines. (hopkinsmedicine.org)

We show that this model is too simplistic for highly ordered, regioregular P3HT and that, analogous to the case of charged polarons in this material, interchain interactions must be taken into account to correctly describe the absorption spectrum. (ep2-bayreuth.de)

As part of the mixtures program a series of documents, Interaction Profiles, are being developed for certain priority mixtures that are of special concern to ATSDR. (cdc.gov)
Hexane has been used as a probe molecule to determine the interactions in liquid mixtures consisting of poly(dimethylsiloxane) (PDMS) and a large monomeric molecule, dinonyl phthalate (DNP) or squalane (SQ), by measuring the absorption of hexane at 303 K into mixtures of the involatile liquids on a vacuum microbalance. (bath.ac.uk)
The measurements for the ternary liquid mixtures formed have been analysed and shown to give consistent interaction parameters between the involatile components. (bath.ac.uk)

The use of novel oral anticoagulants, including dabigatran, rivaroxaban, and apixaban, is not expected to cause significant interactions, and their use has been suggested as an alternative for patients in need of anticoagulation. (cdc.gov)

The effects of grain boundary misorientations, porosity, grain morphology, dislocation densities, and crystal-binder interactions were coupled with adiabatic plasticity heating, thermal decomposition, and dissipated heat to analyze hot spot formation. (ncsu.edu)

Another source of drug interactions occurs when one drug alters the concentration of a substance that is normally present in the body. (rxlist.com)

Remote detection of a highly resolved oxygen absorption line. (lu.se)
In all cases, for clever detection schemes and interpretation profound spectroscopic knowledge on light-sample interaction is required. (lu.se)

The absorption spectrum of polythiophene and its derivative poly(3-hexylthiophene) (P3HT) is usually described in terms of an intrachain exciton coupled to a single phonon mode. (ep2-bayreuth.de)

A weight-of-evidence approach is commonly used in these documents to evaluate the influence of interactions in the overall toxicity of the mixture. (cdc.gov)

3.5% of these interactions were potentially serious. (cdc.gov)

Light interaction with a biological sample. (lu.se)

Anatomy29

Organisms10

Diseases9

Chemicals and Drugs117

Analytical, Diagnostic and Therapeutic Techniques and Equipment32

Phenomena and Processes49

Disciplines and Occupations4

Technology, Industry, Agriculture19

Health Care6

Metabolism5

Spectroscopy5

Interfere4

Pharmacokinetic interactions2

Inhibition3

Inhibit4

Waals2

Tetracycline2

Occur7

Intestine1

Electromagnetic3

Drugs13

Intake2

Calcium4

Tetracyclines2

Reduces1

Checker1

Severity1

Antacids1

Induce1

Nutrient1

Precautions2

Plasmon3

Concomitant1

Pharmacodynamic1

Possible drug interactions2

Warfarin7

Emission5

Decrease1

Exposure3

Medications1

Type of interaction1

Likelihood1

Prevents2

Vitamin4

Molecular1

Side effects2

Transporters3

Iron2

Mechanisms3

Reduce2

Limits1

Medicines1

Describe1

Mixtures3

Significant1

HEAT1

Occurs1

Detection2

Derivative1

Influence1

Potentially1

Light1