Interactions between Trospium and Valacyclovir
1 drug interaction and 16 additional warnings found for the following 2 drugs:
- trospium
- valacyclovir
Drug interactions
Moderate drug interactions
Moderate:
valACYclovir trospium
Applies to: valacyclovir and trospium
Monitor
Theoretically, coadministration of trospium chloride with other drugs that are eliminated by active tubular secretion may result in increased plasma concentrations of trospium and/or the coadministered drug(s). The mechanism is competitive inhibition of renal excretion. Drugs that are thought to undergo active tubular secretion include acyclovir/valacyclovir, cidofovir, cimetidine, digoxin, flecainide, ganciclovir/valganciclovir, metformin, midodrine, morphine, pancuronium, procainamide, quinidine, ranitidine, tenofovir, triamterene, and vancomycin.
Management
Patients receiving trospium chloride in combination with other drugs that undergo active tubular secretion should be monitored for excessive pharmacologic effects of one or both drugs, and the dosages of the drugs adjusted if necessary.
References (5)
- (2012) "Product Information. Sanctura (trospium)." Odyssey Pharmaceuticals
- (2024) "Product Information. Cobenfy (trospium-xanomeline)." Bristol-Myers Squibb
- (2019) "Product Information. Trosec (trospium)." Oryx Pharmaceuticals Inc
- (2022) "Product Information. Regurin (trospium)." Unassigned Manufacturer
- (2023) "Product Information. Trospium Chloride (trospium)." Padagis
Food/lifestyle interactions
Moderate food/lifestyle interactions
Moderate:
trospium Food/Lifestyle
Applies to: trospium
Adjust dosing interval
Food may reduce the oral absorption and bioavailability of trospium chloride. According to the product labeling, administration of trospium chloride with a high fat meal reduced the peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) by 70% to 80% compared to administration while fasting.
Management
To ensure maximal oral absorption, trospium chloride should be administered at least 1 hour before meals or on an empty stomach. If trospium chloride is administered as a combination with xanomeline, the manufacturer recommends administering the capsules at least 1 hour before a meal or at least 2 hours after a meal. Capsules should be taken whole.
References (5)
- (2012) "Product Information. Sanctura (trospium)." Odyssey Pharmaceuticals
- (2024) "Product Information. Cobenfy (trospium-xanomeline)." Bristol-Myers Squibb
- (2019) "Product Information. Trosec (trospium)." Oryx Pharmaceuticals Inc
- (2022) "Product Information. Regurin (trospium)." Unassigned Manufacturer
- (2023) "Product Information. Trospium Chloride (trospium)." Padagis
Disease interactions
15 potential interactions Applies to: 14 conditions, including Ulcerative Colitis, Myasthenia Gravis, Urinary Retention, Hemodialysis, and Liver Disease.
Alcoholism
Moderate:
trospium
Trospium has a moderate potential interaction with Alcoholism.
The use of alcohol may enhance the drowsiness caused by anticholinergic agents. It is recommended that alcohol should not be consumed within 2 hours of trospium administration. Caution should be exercised when using this agent in alcoholic patients.
Bone Marrow Transplantation
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Bone Marrow Transplantation.
Thrombotic thrombocytopenic purpura/hemolytic uremia syndrome (TTP/HUS), in some cases resulting in death, has been reported in patients with advanced HIV-1 disease, in allogeneic bone marrow transplant recipients, and in renal transplant recipients during clinical trials of valacyclovir at doses of 8 g/day. Therapy with valacyclovir should be discontinued immediately if clinical signs, symptoms, and laboratory abnormalities consistent with TTP/HUS develop.
Dehydration
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Dehydration.
Valacyclovir is almost completely converted to acyclovir and L-valine by first-pass intestinal and/or hepatic metabolism; acyclovir is primarily eliminated by the kidney. Cases of acute renal failure have been reported in patients without adequate hydration. Acyclovir may precipitate in renal tubules when the solubility (2.5 mg/mL) is exceeded in the intratubular fluid. Adequate hydration should be maintained for all patients. If acute renal failure and anuria occur, patients may benefit from hemodialysis until renal function is restored.
Gastrointestinal Obstruction
Major:
trospium
Trospium has a major potential interaction with Gastrointestinal Obstruction.
The use of trospium is contraindicated in patients with gastric retention. Trospium reduces the tonus of smooth muscle and may decrease gastrointestinal motility, hence it should be used with caution in patients with conditions such as ulcerative colitis, intestinal atony and myasthenia gravis. Caution should be exercised when using this drug in patients with gastrointestinal obstructive disorders as it increases the risk of gastric retention.
Glaucoma, Narrow Angle
Major:
trospium
Trospium has a major potential interaction with Glaucoma, Narrow Angle.
The use of trospium is contraindicated in patients with uncontrolled narrow-angle glaucoma. In those patients being treated for narrow-angle glaucoma, trospium should only be used if the potential benefits outweigh the risks and in that circumstance only with careful monitoring.
Hemodialysis
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Hemodialysis.
Valacyclovir is almost completely converted to acyclovir and L-valine by first-pass intestinal and/or hepatic metabolism. About one-third of acyclovir in the body is removed by dialysis during a 4-hour hemodialysis session. The recommended dose of valacyclovir should be administered after hemodialysis.
Immunodeficiency
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Immunodeficiency.
Thrombotic thrombocytopenic purpura/hemolytic uremia syndrome (TTP/HUS), in some cases resulting in death, has been reported in patients with advanced HIV-1 disease, in allogeneic bone marrow transplant recipients, and in renal transplant recipients during clinical trials of valacyclovir at doses of 8 g/day. Therapy with valacyclovir should be discontinued immediately if clinical signs, symptoms, and laboratory abnormalities consistent with TTP/HUS develop.
Liver Disease
Moderate:
trospium
Trospium has a moderate potential interaction with Liver Disease.
Caution is advised when administering trospium to patients with moderate to severe hepatic impairment. There is no information regarding the effect of severe hepatic impairment on exposure to trospium.
Myasthenia Gravis
Major:
trospium
Trospium has a major potential interaction with Myasthenia Gravis.
The use of trospium is contraindicated in patients with gastric retention. Trospium reduces the tonus of smooth muscle and may decrease gastrointestinal motility, hence it should be used with caution in patients with conditions such as ulcerative colitis, intestinal atony and myasthenia gravis. Caution should be exercised when using this drug in patients with gastrointestinal obstructive disorders as it increases the risk of gastric retention.
Neutropenia
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Neutropenia.
Thrombotic thrombocytopenic purpura/hemolytic uremia syndrome (TTP/HUS), in some cases resulting in death, has been reported in patients with advanced HIV-1 disease, in allogeneic bone marrow transplant recipients, and in renal transplant recipients during clinical trials of valacyclovir at doses of 8 g/day. Therapy with valacyclovir should be discontinued immediately if clinical signs, symptoms, and laboratory abnormalities consistent with TTP/HUS develop.
Organ Transplant
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Organ Transplant.
Thrombotic thrombocytopenic purpura/hemolytic uremia syndrome (TTP/HUS), in some cases resulting in death, has been reported in patients with advanced HIV-1 disease, in allogeneic bone marrow transplant recipients, and in renal transplant recipients during clinical trials of valacyclovir at doses of 8 g/day. Therapy with valacyclovir should be discontinued immediately if clinical signs, symptoms, and laboratory abnormalities consistent with TTP/HUS develop.
Renal Dysfunction
Moderate:
trospium
Trospium has a moderate potential interaction with Renal Dysfunction.
Trospium is known to be substantially excreted by the kidney, and the risk of adverse reactions may be greater in patients with impaired renal function. A reduced dose is recommended in patients with severe renal impairment (CrCl less than 30 mL/minute). The pharmacokinetics of trospium have not been studied in patients with CrCl 30 to 80 mL/min.
Moderate:
valacyclovir
valACYclovir has a moderate potential interaction with Renal Dysfunction.
Valacyclovir is almost completely converted to acyclovir and L-valine by first-pass intestinal and/or hepatic metabolism; acyclovir is primarily eliminated by the kidney. Cases of acute renal failure and CNS side effects (including agitation, hallucinations, confusion, delirium, seizures, and encephalopathy) have been reported in patients with preexisting renal disease who received higher-than-recommended doses of valacyclovir for their level of renal function. Cases of acute renal failure have also been reported in patients receiving other nephrotoxic agents. Therapy with valacyclovir should be administered cautiously in elderly patients (with or without renal dysfunction) and patients receiving other nephrotoxic agents. Dosage reductions are recommended in patients with renal dysfunction. If acute renal failure and anuria occur, patients may benefit from hemodialysis until renal function is restored; valacyclovir should be discontinued if CNS side effects develop.
Ulcerative Colitis
Major:
trospium
Trospium has a major potential interaction with Ulcerative Colitis.
The use of trospium is contraindicated in patients with gastric retention. Trospium reduces the tonus of smooth muscle and may decrease gastrointestinal motility, hence it should be used with caution in patients with conditions such as ulcerative colitis, intestinal atony and myasthenia gravis. Caution should be exercised when using this drug in patients with gastrointestinal obstructive disorders as it increases the risk of gastric retention.
Urinary Retention
Major:
trospium
Trospium has a major potential interaction with Urinary Retention.
Use of trospium is contraindicated in patients with urinary retention. Administer trospium with caution in patients with clinically significant bladder outflow obstruction because of the risk of urinary retention.
More resources
trospium
A total of 332 drugs are known to interact with trospium.
- Trospium is in the drug class urinary antispasmodics.
- Trospium is used to treat the following conditions:
valacyclovir
A total of 94 drugs are known to interact with valacyclovir.
- Valacyclovir is in the drug class purine nucleosides.
- Valacyclovir is used to treat the following conditions:
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
| No interaction information available. |
Further information
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