Skip to Content

Tekturna HCT (aliskiren / hydrochlorothiazide) and Alcohol / Food Interactions

There are 3 alcohol/food/lifestyle interactions with Tekturna HCT (aliskiren / hydrochlorothiazide) which include:


hydroCHLOROthiazide ↔ Alcohol (Ethanol)

Moderate Drug Interaction

HydroCHLOROthiazide and ethanol may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate. These side effects are most likely to be seen at the beginning of treatment, following a dose increase, or when treatment is restarted after an interruption. Let your doctor know if you develop these symptoms and they do not go away after a few days or they become troublesome. Avoid driving or operating hazardous machinery until you know how the medications affect you, and use caution when getting up from a sitting or lying position. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data


aliskiren ↔ food

Moderate Food Interaction

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Coadministration with orange, apple, or grapefruit juice may significantly decrease the oral bioavailability and renin-inhibiting effect of aliskiren. The exact mechanism of interaction is unknown, but may include inhibition of OATP2B1-mediated influx of aliskiren in the small intestine, formation of insoluble complexes between fruit juice constituents and aliskiren, and/or increased ionization of aliskiren due to reduced intestinal pH. In 12 healthy volunteers, 200 mL of either orange juice or apple juice administered three times daily for 5 days in combination with a single 150 mg oral dose of aliskiren on day 3 reduced the mean aliskiren peak plasma concentration (Cmax) and systemic exposure (AUC) by approximately 80% and 60%, respectively, compared to water. Plasma renin activity was 87% and 67% higher at 24 hours postdose when aliskiren was administered with orange juice and apple juice, respectively, compared to water. No significant differences were observed in the blood pressure or heart rate between treatments. However, this may be due to the delayed onset of aliskiren's blood pressure-lowering effect, which would not be apparent following a single dose. A similar pharmacokinetic interaction has been reported with grapefruit juice. In 11 healthy volunteers, 200 mL of normal strength grapefruit juice administered three times daily for 5 days in combination with a single 150 mg oral dose of aliskiren on day 3 reduced the mean aliskiren Cmax and AUC by 81% and 61%, respectively, but there was no change in plasma renin activity compared to water. A high degree of interpatient variability was observed with all three interactions.

MONITOR: High-fat meals can substantially reduce the gastrointestinal absorption of aliskiren. According to the product labeling, administration of aliskiren with a high-fat meal decreased the mean peak plasma concentration (Cmax) and systemic exposure (AUC) by 85% and 71%, respectively. In clinical trials, however, aliskiren was administered without a fixed requirement in relation to meals.

MANAGEMENT: To ensure steady systemic drug levels and therapeutic effects, patients should establish a routine pattern for administration of aliskiren with regard to meals. Coadministration with orange, apple, or grapefruit juice should be avoided, especially if these juices are to be consumed on a regular basis or shortly before or after aliskiren dosing.


  1. Tapaninen T, Neuvonen PJ, Niemi M "Grapefruit juice greatly reduces the plasma concentrations of the OATP2B1 and CYP3A4 substrate aliskiren." Clin Pharmacol Ther 88 (2010): 339-42
  2. Tapaninen T, Neuvonen PJ, Niemi M "Orange and apple juices greatly reduce the plasma concentrations of the OATP2B1 substrate aliskiren." Br J Clin Pharmacol 71 (2010): 718-26
  3. Vaidyanathan S, Jarugula V, Dieterich HA, Howard D, Dole WP "Clinical pharmacokinetics and pharmacodynamics of aliskiren." Clin Pharmacokinet 47 (2008): 515-31
  4. "Product Information. Tekturna (aliskiren)." Novartis Pharmaceuticals, East Hanover, NJ.
View all 4 references

High Cholesterol (Hyperlipoproteinemia, Hypertriglyceridemia, Sitosterolemia)

Moderate Potential Hazard, Moderate plausibility

thiazides - hyperlipidemia

Thiazide diuretics may increase serum triglyceride and cholesterol levels, primarily LDL and VLDL. Whether these effects are dose-related and sustained during chronic therapy are unknown. Patients with preexisting hyperlipidemia may require closer monitoring during thiazide therapy, and adjustments made accordingly in their lipid-lowering regimen


  1. Ames RP "A comparison of blood lipid and blood pressure responses during the treatment of systemic hypertension with indapamide and with thiazides." Am J Cardiol 77 (1996): b12-6
  2. Freis ED "The efficacy and safety of diuretics in treating hypertension." Ann Intern Med 122 (1995): 223-6
  3. Slotkoff L "Clinical efficacy and safety of indapamide in the treatment of edema." Am Heart J 106 (1983): 233-7
  4. "Product Information. Lozol (indapamide)." Rhone-Poulenc Rorer, Collegeville, PA.
  5. Elmfeldt D, Berglund G, Wedel H, Wilhelmsen L "Incidence and importance of metabolic side-effects during antihypertensive therapy." Acta Med Scand Suppl 672 (1983): 79-83
  6. Winchester JF, Kellett RJ, Boddy K, Boyle P, Dargie HJ, Mahaffey ME, Ward DM, Kennedy AC "Metolazone and bendroflumethiazide in hypertension: physiologic and metabolic observations." Clin Pharmacol Ther 28 (1980): 611-8
  7. "Product Information. Diuril (chlorothiazide)." Merck & Co, Inc, West Point, PA.
  8. Ames RP, Hill P "Increase in serum-lipids during treatment of hypertension with chlorthalidone." Lancet 1 (1976): 721-3
  9. Pollare T, Lithell H, Berne C "A comparison of the effects of hydrochlorothiazide and captopril on glucose and lipid metabolism in patients with hypertension." N Engl J Med 321 (1989): 868-73
  10. "Product Information. Thalitone (chlorthalidone)." Monarch Pharmaceuticals Inc, Bristol, TN.
  11. Smith WM "Diuretics and cholesterol elevation." JAMA 242 (1979): 1612
  12. Kasiske BL, Ma JZ, Kalil RS, Louis TA "Effects of antihypertensive therapy on serum lipids." Ann Intern Med 122 (1995): 133-41
  13. Beling S, Vukovich RA, Neiss ES, Zisblatt M, Webb E, Losi M "Long-term experience with indapamide." Am Heart J 106 (1983): 258-62
  14. Pollare T, Lithell H, Berne C "A comparison of the effects of hydrochlorothiazide and captopril on glucose and lipid metabolism in patients with hypertension." N Engl J Med 321 (1989): 868-73
  15. "Product Information. Zaroxolyn (metolazone)." Rhone-Poulenc Rorer, Collegeville, PA.
  16. Fager G, Berglund G, Bondjers G, Elmfeldt D, Lager I, Olofsson SO, Smith U, Wiklund O "Effects of anti-hypertensive therapy on serum lipoproteins. Treatment with metoprolol, propranolol and hydrochlorothiazide." Artery 11 (1983): 283-96
  17. "Product Information. HydroDIURIL (hydrochlorothiazide)." Merck & Co, Inc, West Point, PA.
  18. "Product Information. Metahydrin (trichlormethiazide)." Hoechst Marion-Roussel Inc, Kansas City, MO.
  19. "Product Information. Enduron (methyclothiazide)." Abbott Pharmaceutical, Abbott Park, IL.
  20. Petri M, Cumber P, Grimes L, Treby D, Bryant R, Rawlins D, Ising H "The metabolic effects of thiazide therapy in the elderly: a population study." Age Ageing 15 (1986): 151-5
  21. Luther RR, Glassman HN, Estep CB, Maurath CJ, Jordan DC "The effects of terazosin and methyclothiazide on blood pressure and serum lipids." Am Heart J 117 (1989): 842-7
  22. "Product Information. Renese-R (reserpine-polythiazide)." Pfizer US Pharmaceuticals, New York, NY.
  23. "Product Information. Diucardin (hydroflumethiazide)." Wyeth-Ayerst Laboratories, Philadelphia, PA.
View all 23 references

Tekturna HCT (aliskiren / hydrochlorothiazide) drug Interactions

There are 930 drug interactions with Tekturna HCT (aliskiren / hydrochlorothiazide)

Tekturna HCT (aliskiren / hydrochlorothiazide) disease Interactions

There are 14 disease interactions with Tekturna HCT (aliskiren / hydrochlorothiazide) which include:

Drug Interaction Classification

The classifications below are a general guideline only. It is difficult to determine the relevance of a particular drug interaction to any individual given the large number of variables.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor 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.
Unknown No information available.

Do not stop taking any medications without consulting your healthcare provider.

Disclaimer: Every effort has been made to ensure that the information provided by Multum is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. Multum's information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill, knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective, or appropriate for any given patient. Multum Information Services, Inc. does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Copyright 2000-2018 Multum Information Services, Inc. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse, or pharmacist.