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The 97 pages that link to Drug interaction, each with the reason it gives.

• ModafinilNarrower topic: Modafinil can affect drug-metabolizing enzymes and alter the effects of some medicines.

• OmeprazoleRelated: Omeprazole’s enzyme inhibition can alter the handling of particular co-administered medicines.

• CimetidineNarrower topic: Cimetidine’s inhibition of drug-metabolizing enzymes made interaction checking especially important.

• Clinical pharmacologyRelated: Interactions can change exposure or response and make a previously suitable regimen unsafe.

• Contraceptive implantRelated: Some enzyme-inducing medicines can lower etonogestrel levels and reduce contraceptive effectiveness.

• HydroxyzineNarrower topic: Alcohol and other central nervous system depressants can intensify hydroxyzine-related drowsiness.

• PromethazineRelated: Alcohol and other sedatives can amplify promethazine's effects on alertness and breathing.

• SirolimusRelated: CYP3A4 and P-glycoprotein interactions can sharply alter sirolimus exposure.

• TheophyllineRelated: Smoking and medicines such as ciprofloxacin can substantially alter theophylline concentrations.

• AmiodaroneRelated: Amiodarone affects drug metabolism and can raise concentrations of medicines such as warfarin and digoxin.

• ClomipramineRelated: Other medicines can raise clomipramine exposure or amplify its serotonergic and cardiac effects.

• ClonidineNarrower topic: Other medicines that slow heart rate or depress the central nervous system can intensify clonidine's effects.

• Julius AxelrodRelated: Axelrod’s findings on drug-metabolizing enzymes explain how one compound can alter another’s clearance.

• LevonorgestrelRelated: Some enzyme-inducing medicines can lower levonorgestrel concentrations and reduce contraceptive reliability.

• LoratadineRelated: Some medicines that affect loratadine metabolism can change its exposure.

• AnticonvulsantRelated: Enzyme-inducing anticonvulsants can alter concentrations of contraceptives, anticoagulants, and other drugs.

• ClarithromycinNarrower topic: Its enzyme inhibition creates clinically significant interactions with several medications.

• EthinylestradiolNarrower topic: Interactions can alter ethinylestradiol levels or change the safety and effectiveness of a contraceptive regimen.

• FluconazoleRelated: Fluconazole inhibits human drug-metabolizing enzymes, raising concentrations of some co-administered medicines.

• LoperamideRelated: Some medicines inhibit loperamide transport or metabolism, raising exposure and cardiac risk.

• MontelukastRelated: Some enzyme-modifying medicines can alter montelukast exposure.

• TretinoinRelated: Oxidizing agents and irritating skin products can complicate topical tretinoin use.

• ApixabanRelated: Strong P-glycoprotein or CYP3A4 modifiers can change apixaban exposure.

• DisulfiramRelated: Disulfiram can alter the effects of certain medications, so treatment requires interaction checks.

• PharmacistRelated: Checking for interactions is a core part of safe medication review.

• PseudoephedrineNarrower topic: Interactions with monoamine oxidase inhibitors can produce dangerous increases in adrenergic effects.

• TadalafilNarrower topic: Interactions with nitrates and some other medicines shape tadalafil’s prescribing precautions.

• TherapeuticsRelated: Interactions can alter efficacy or toxicity when treatments are combined.

• TrazodoneNarrower topic: Other serotonergic or sedating drugs can alter trazodone's risks.

• Amyl nitriteRelated: Combining amyl nitrite with erectile-dysfunction medicines can cause dangerous hypotension.

• DepressantRelated: Alcohol, sedatives, and opioids can intensify one another's impairment and breathing risks.

• Drug classRelated: Class-wide interactions can follow shared mechanisms, but individual members may differ.

• HypericumRelated: St. John's wort can alter the metabolism of many medicines, reducing their effectiveness.

• Hypericum perforatumRelated: The plant can alter drug metabolism and reduce the effectiveness of several medicines.

• PhenytoinRelated: Phenytoin both induces drug-metabolizing enzymes and is affected by interacting medicines.

• RivaroxabanRelated: Strong enzyme or transporter interactions can alter rivaroxaban levels and bleeding risk.

• CyclizineRelated: Alcohol and other sedating or anticholinergic drugs can amplify cyclizine’s adverse effects.

• FluphenazineRelated: Interactions can alter fluphenazine's effects or increase adverse reactions.

• FluvoxamineNarrower topic: Its enzyme inhibition can make co-administered drugs reach higher concentrations.

• Folk healerRelated: Herbal remedies used alongside prescriptions can alter treatment effects or risks.

• GlibenclamideNarrower topic: Several medicines can amplify or diminish glibenclamide’s glucose-lowering effect.

• IndometacinRelated: Anticoagulants, other NSAIDs, and some blood-pressure medicines can alter indometacin’s risks or effects.

• Magnesium citrateNarrower topic: Magnesium can bind some oral medicines in the gut and reduce their absorption.

• Medicine (drug or remedy)Related: Interactions can alter a medicine’s effectiveness or toxicity.

• OrlistatRelated: Reduced absorption can affect medicines such as ciclosporin, warfarin, and levothyroxine, requiring clinical management.

• PiroxicamRelated: Anticoagulants, other NSAIDs, and some blood-pressure medicines can alter piroxicam’s safety.

• TimololRelated: Other heart-rate-lowering medicines can amplify timolol's cardiac effects.