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Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
The incidence of adverse reactions has been ascertained from 3 placebo-controlled clinical trials involving 1,608 men where daily doses of 10 and 15 mg alfuzosin were evaluated. In these 3 trials, 473 men received UROXATRAL (alfuzosin HCl) 10 mg extended-release tablets. In these trials, 4% of patients taking UROXATRAL (alfuzosin HCl) 10 mg extended-release tablets withdrew from the trial due to adverse reactions, compared with 3% in the placebo group.
Table 1 summarizes adverse reactions that occurred in ≥2% of patients receiving UROXATRAL, and at a higher incidence than that of the placebo group. In general, the adverse reactions seen in long-term use were similar in type and frequency to the events described below for the 3-month trials.
Table 1 : Adverse Reactions Occurring in ≥2% of
UROXATRAL-Treated Patients and More Frequently than with Placebo in 3-Month
Placebo-Controlled Clinical Trials
|Dizziness||19 (2.8%)||27 (5.7%)|
|Upper respiratory tract infection||4 (0.6%)||14 (3.0%)|
|Headache||12 (1.8%)||14 (3.0%)|
|Fatigue||12 (1.8%)||13 (2.7%)|
The following adverse reactions, reported by between 1% and 2% of patients receiving UROXATRAL and occurring more frequently than with placebo, are listed alphabetically by body system and by decreasing frequency within body system:
Body as a whole: pain
Gastrointestinal system: abdominal pain, dyspepsia, constipation, nausea
Reproductive system: impotence
Signs and Symptoms of Orthostasis in Clinical Trials: The adverse reactions related to orthostasis that occurred in the double-blind phase 3 trials with alfuzosin 10 mg are summarized in Table 2. Approximately 20% to 30% of patients in these trials were taking antihypertensive medication.
Table 2: Number (%) of Patients with Symptoms Possibly
Associated with Orthostasis in 3-Month Placebo-Controlled Clinical Trials
|Dizziness||19 (2.8%)||27 (5.7%)|
|Hypotension or postural hypotension||0||2 (0.4%)|
Testing for blood pressure changes or orthostatic hypotension was conducted in three controlled studies. Decreased systolic blood pressure (≤90 mm Hg, with a decrease ≥20 mm Hg from baseline) was observed in none of the 674 placebo patients and 1 (0.2%) of the 469 UROXATRAL patients. Decreased diastolic blood pressure (≤50 mm Hg, with a decrease ≥15 mm Hg from baseline) was observed in 3 (0.4%) of the placebo patients and in 4 (0.9%) of the UROXATRAL patients. A positive orthostatic test (decrease in systolic blood pressure of ≥20 mm Hg upon standing from the supine position) was seen in 52 (7.7%) of placebo patients and in 31 (6.6%) of the UROXATRAL patients.
The following adverse reactions have been identified during post approval use of UROXATRAL. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
General disorders: edema
Gastrointestinal disorders: diarrhea
Hepatobiliary disorders: hepatocellular and cholestatic liver injury (including cases with jaundice leading to drug discontinuation)
Respiratory system disorders: rhinitis
Reproductive system disorders: priapism
Vascular disorders: flushing
Blood and lymphatic system disorders: thrombocytopenia
During cataract surgery, a variant of small pupil syndrome known as Intraoperative Floppy Iris Syndrome (IFIS) has been reported in some patients on or previously treated with alpha adrenergic antagonists [see WARNINGS AND PRECAUTIONS].
Read the Uroxatral (alfuzosin hcl) Side Effects Center for a complete guide to possible side effects
UROXATRAL is contraindicated for use with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, or ritonavir, since alfuzosin blood levels are increased [see CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS and CLINICAL PHARMACOLOGY].
Alpha Adrenergic Antagonists
The pharmacokinetic and pharmacodynamic interactions between UROXATRAL and other alpha adrenergic antagonists have not been determined. However, interactions may be expected, and UROXATRAL should not be used in combination with other alpha adrenergic antagonists [see WARNINGS AND PRECAUTIONS].
Antihypertensive Medication And Nitrates
Caution is advised when alpha adrenergic antagonists, including UROXATRAL, are coadministered with PDE5 inhibitors. Alpha adrenergic antagonists and PDE5 inhibitors are both vasodilators that can lower blood pressure. Concomitant use of these two drug classes can potentially cause symptomatic hypotension [see WARNINGS AND PRECAUTIONS].
Read the Uroxatral Drug Interactions Center for a complete guide to possible interactions
Last reviewed on RxList: 5/2/2014
This monograph has been modified to include the generic and brand name in many instances.
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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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