ALFUZOSIN HYDROCHLORIDE — alfuzosin hydrochloride tablet
Alfuzosin HCl extended-release tablets are indicated for the treatment of signs and symptoms of benign prostatic hyperplasia.
Alfuzosin HCl extended-release tablets are not indicated for the treatment of hypertension.
Alfuzosin HCl extended-release tablets are not indicated for use in the pediatric population.
The recommended dosage is one 10 mg alfuzosin HCl extended-release tablet once daily. The extent of absorption of alfuzosin is 50% lower under fasting conditions. Therefore, alfuzosin HCl extended-release tablets should be taken with food and with the same meal each day. The tablets should not be chewed or crushed.
Alfuzosin HCl extended-release tablets 10 mg are available as white and yellow colored bi-layered circular shaped standard convex tablets, debossed with ‘W738’ on yellow layer.
Alfuzosin HCl extended-release tablets are contraindicated for use:
- in patients with moderate or severe hepatic impairment (Childs-Pugh categories B and C), since alfuzosin blood levels are increased in these patients [see Use in Specific Populations (8.7) and Clinical Pharmacology (12.3)].
- with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, and ritonavir, since alfuzosin blood levels are increased [see Drug Interactions (7.1) and Clinical Pharmacology (12.3)].
- in patients with known hypersensitivity, such as urticaria and angioedema, to alfuzosin hydrochloride or any component of alfuzosin HCl extended-release tablets [see Adverse Reactions (6.2)]
Postural hypotension with or without symptoms (e.g., dizziness) may develop within a few hours following administration of alfuzosin HCl extended-release tablets. As with other alpha adrenergic antagonists, there is a potential for syncope. Patients should be warned of the possible occurrence of such events and should avoid situations where injury could result should syncope occur. There may be an increased risk of hypotension/postural hypotension and syncope when taking alfuzosin HCl extended-release tablets concomitantly with anti-hypertensive medication and nitrates. Care should be taken when alfuzosin HCl extended-release tablets are administered to patients with symptomatic hypotension or patients who have had a hypotensive response to other medications.
Caution should be exercised when alfuzosin HCl extended-release tablets are administered in patients with severe renal impairment (creatinine clearance < 30 mL/min) [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)].
Alfuzosin HCl extended-release tablets are contraindicated for use in patients with moderate or severe hepatic impairment [see Contraindications (4), Use in Specific Populations (8.7) and Clinical Pharmacology (12.3)]. Although the pharmacokinetics of alfuzosin HCl extended-release tablets have not been studied in patients with mild hepatic impairment, caution should be exercised when alfuzosin HCl extended-release tablets are administered to such patients [see Use in Specific Populations (8.7) and Clinical Pharmacology (12.3)].
Potent CYP3A4 Inhibitors: Alfuzosin HCl extended-release tablets are contraindicated for use with potent CYP3A4 inhibitors (e.g. ketoconazole, itraconazole, ritonavir) since alfuzosin blood levels are increased [see Contraindications (4), Drug Interactions (7.1) and Clinical Pharmacology (12.3)].
Other alpha adrenergic antagonists: Alfuzosin HCl extended-release tablets are an alpha adrenergic antagonist and should not be used in combination with other alpha adrenergic antagonist [see Drug Interactions (7.2)].
Phosphodiesterase-5 (PDE5) Inhibitors: PDE5-inhibitors are also vasodilators. Caution is advised for concomitant use of PDE5-inhibitors and alfuzosin HCl extended-release tablets, as this combination can potentially cause symptomatic hypotension [see Drug Interactions (7.4)].
Carcinoma of the prostate and benign prostatic hyperplasia (BPH) cause many of the same symptoms. These two diseases frequently coexist. Therefore, patients thought to have BPH should be examined to rule out the presence of carcinoma of the prostate prior to starting treatment with alfuzosin HCl extended-release tablets.
IFIS has been observed during cataract surgery in some patients on or previously treated with alpha adrenergic antagonists. This variant of small pupil syndrome is characterized by the combination of a flaccid iris that billows in response to intraoperative irrigation currents, progressive intraoperative miosis despite preoperative dilation with standard mydriatic drugs, and potential prolapse of the iris toward the phacoemulsification incisions. The patient’s ophthalmologist should be prepared for possible modifications to their surgical technique, such as the utilization of iris hooks, iris dilator rings, or viscoelastic substances.
There does not appear to be a benefit of stopping alpha adrenergic antagonist therapy prior to cataract surgery.
Rarely (probably less than 1 in 50,000), alfuzosin, like other alpha adrenergic antagonists, has been associated with priapism (persistent painful penile erection unrelated to sexual activity). Because this condition can lead to permanent impotence if not properly treated, patients should be advised about the seriousness of the condition [see Adverse Reactions (6.2) and Patient Counseling Information (17.3)].
If symptoms of angina pectoris should appear or worsen, alfuzosin HCl extended-release tablets should be discontinued.
Use with caution in patients with acquired or congenital QT prolongation or who are taking medications that prolong the QT interval [see Clinical Pharmacology (12.2)].
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 alfuzosin HCl extended-release tablets 10 mg. In these trials, 4% of patients taking alfuzosin HCl extended-release tablets 10 mg 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 alfuzosin HCl extended-release tablets, 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.
|Adverse Reaction||Placebo||Alfuzosin HCl Extended – Release Tablets|
|( n = 678 )||( n = 473 )|
|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 alfuzosin HCl extended-release tablets 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
Respiratory system: bronchitis, sinusitis, pharyngitis
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.
|Symptoms||Placebo||Alfuzosin HCl Extended – Release Tablets|
|( n = 678 )||( n = 473 )|
|Dizziness||19 (2.8%)||27 (5.7%)|
|Hypotension or posturalhypotension||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 alfuzosin HCl extended-release tablets 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 alfuzosin HCl extended-release tablets 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 alfuzosin HCl extended-release tablets patients.
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