You should promptly seek professional mediscal care if you have any concern about your health, and you should always consult your physician before starting fitness regimen. When used in pregnancy during the second and third trimesters, drugs that act directly on the renin-angiotensin system can cause injury and even death to the developing fetus. Pediatric Irbesartan-hydrochlorothiazide pharmacokinetics have not been investigated in patients 18 years of age. If fainting occurs, the patient should stop using AVALIDE and contact the prescribing doctor. Aldosterone plasma concentrations generally decline following irbesartan administration, but serum potassium levels are not significantly affected at recommended doses. The adverse reaction information from clinical trials does, however, provide basis for identifying the adverse events that appear to be related to drug use and for approximating kopen avalide drugs rates. Marked hypercalcemia may be evidence of hidden hyperparathyroidism.