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Drug Interactions between Exna and Garlic Oil

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Minor

benzthiazide garlic

Applies to: Exna (benzthiazide) and Garlic Oil (garlic)

Garlic has been found in some studies to lower blood pressure and may theoretically potentiate the effects of hypotensive agents. A meta-analysis of 11 randomized, placebo-controlled studies showed a mean decrease of 4.6 mmHg for systolic blood pressure and no significant effect for diastolic blood pressure in subjects treated with garlic (most often garlic powder 600 to 900 mg/day, providing 3.6 to 5.4 mg of the active component allicin) compared to placebo. In the subgroup analysis of studies where subjects had a mean baseline blood pressure in the hypertensive range (SBP 140 mmHg or higher; DBP 90 mmHg or higher), mean decrease associated with garlic was 8.4 mmHg and 7.3 mmHg, respectively, for systolic and diastolic blood pressure. There have been no reports of clinical hypotension associated with concomitant use of garlic and antihypertensive agents.

References

  1. Richard CL, Jurgens TM "Effects of natural health products on blood pressure." Ann Pharmacother 39 (2005): 712-20
  2. Tattelman E "Health effects of garlic." Am Fam Physician 72 (2005): 103-6

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Drug and food interactions

Moderate

benzthiazide food

Applies to: Exna (benzthiazide)

MONITOR: Many psychotherapeutic and CNS-active agents (e.g., anxiolytics, sedatives, hypnotics, antidepressants, antipsychotics, opioids, alcohol, muscle relaxants) exhibit hypotensive effects, especially during initiation of therapy and dose escalation. Coadministration with antihypertensives and other hypotensive agents, in particular vasodilators and alpha-blockers, may result in additive effects on blood pressure and orthostasis.

MANAGEMENT: Caution and close monitoring for development of hypotension is advised during coadministration of these agents. Some authorities recommend avoiding alcohol in patients receiving vasodilating antihypertensive drugs. Patients should be advised to avoid rising abruptly from a sitting or recumbent position and to notify their physician if they experience dizziness, lightheadedness, syncope, orthostasis, or tachycardia.

References

  1. Sternbach H "Fluoxetine-associated potentiation of calcium-channel blockers." J Clin Psychopharmacol 11 (1991): 390-1
  2. Shook TL, Kirshenbaum JM, Hundley RF, Shorey JM, Lamas GA "Ethanol intoxication complicating intravenous nitroglycerin therapy." Ann Intern Med 101 (1984): 498-9
  3. Feder R "Bradycardia and syncope induced by fluoxetine." J Clin Psychiatry 52 (1991): 139
  4. Ellison JM, Milofsky JE, Ely E "Fluoxetine-induced bradycardia and syncope in two patients." J Clin Psychiatry 51 (1990): 385-6
  5. Rodriguez de la Torre B, Dreher J, Malevany I, et al. "Serum levels and cardiovascular effects of tricyclic antidepressants and selective serotonin reuptake inhibitors in depressed patients." Ther Drug Monit 23 (2001): 435-40
  6. Cerner Multum, Inc. "Australian Product Information." O 0
  7. Pacher P, Kecskemeti V "Cardiovascular side effects of new antidepressants and antipsychotics: new drugs, old concerns?" Curr Pharm Des 10 (2004): 2463-75
  8. Andrews C, Pinner G "Postural hypotension induced by paroxetine." BMJ 316 (1998): 595
View all 8 references

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Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
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 interaction information available.

Further information

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