The effects of concomitant administration of a moderate CYP2D6 inhibitor e. Concomitant use of these two drug classes can potentially cause symptomatic hypotension [see Warnings and Precautions 5. Results from limited in vitro and in vivo studies are inconclusive. In a randomized, double-blind, placebo-controlled, week, pharmacokinetic, safety and efficacy study in patients, no statistically significant difference in the proportion of responders was observed between groups receiving tamsulosin hydrochloride and placebo.
In an open-label, month safety study, 87 patients were treated with tamsulosin hydrochloride. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and the other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out [see Clinical Pharmacology Restoration of blood pressure and normalization of heart rate may be accomplished by keeping the patient in the supine position.
If this measure is inadequate, then administration of intravenous fluids should be considered. If necessary, vasopressors should then be used and renal function should be monitored and supported as needed. Tamsulosin hydrochloride is - - R [2-[[2- o-Ethoxyphenoxy ethyl]amino]propyl]methoxybenzenesulfonamide, monohydrochloride.
The static component is related to an increase in prostate size caused, in part, by a proliferation of smooth muscle cells in the prostatic stroma. Results from limited in vitro and in vivo drug-drug interaction studies between tamsulosin hydrochloride and warfarin are inconclusive. Patients should be advised about the possibility of priapism as a result of treatment with FLOMAX capsules and other similar medications. Patients should be informed that this reaction is extremely rare, but if not brought to immediate medical attention, can lead to permanent erectile dysfunction impotence.
The highest doses of tamsulosin hydrochloride evaluated in the rat carcinogenicity study produced systemic exposures AUC in rats 3 times the exposures in men receiving the maximum therapeutic dose of 0. There were no significant tumor findings in male mice. The highest dose levels of tamsulosin hydrochloride evaluated in the mice carcinogenicity study produced systemic exposures AUC in mice 8 times the exposures in men receiving the maximum therapeutic dose of 0.
The increased incidences of mammary gland neoplasms in female rats and mice were considered secondary to tamsulosin hydrochloride-induced hyperprolactinemia. The relevance for human risk of the findings of prolactin-mediated endocrine tumors in rodents is not known. Tamsulosin hydrochloride produced no evidence of mutagenic potential in vitro in the Ames reverse mutation test, mouse lymphoma thymidine kinase assay, unscheduled DNA repair synthesis assay, and chromosomal aberration assays in Chinese hamster ovary cells or human lymphocytes.
People who will be undergoing cataract or glaucoma surgery should tell their doctor that they are taking tamsulosin. Your surgeon may advise you to temporarily stop taking the medication before the surgery. Liver disease or reduced liver function may cause this medication to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
People taking tamsulosin may experience orthostatic hypotension, which is low blood pressure upon arising. If you experience dizziness or weakness, sit or lie down until the symptoms have disappeared. Fainting is the most severe symptom of orthostatic hypotension. Alcohol increases the risk of side-effects from tamsulosin, such as feeling faint or dizzy. Consider reducing or stopping the amount of caffeine you drink commonly found in tea, coffee and cola.
Caffeine can make your symptoms worse, so drinking less of these things may benefit you. If you are a smoker, stopping smoking may significantly improve your symptoms. This is because nicotine irritates the bladder. You can ask your doctor for advice on quitting. If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking tamsulosin.
This is because your blood pressure may drop suddenly if you have an anaesthetic. If you are having cataract surgery, it is particularly important that you tell your surgeon you are on tamsulosin.
This is because an eye problem known as 'floppy iris syndrome' has developed in some people and your doctor may advise you to stop taking tamsulosin for a short while. Can tamsulosin cause problems? Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with tamsulosin.
You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Rarely probably less than 1 in 50, patientstamsulosin, like other alpha1 antagonists, has been associated with priapism persistent painful penile erection unrelated to sexual activity. The pharmacokinetic and pharmacodynamic interactions between FLOMAX capsules and other alpha-adrenergic blocking agents have not been determined. Infrequent reports of palpitations, hypotension, skin desquamation, constipation, flomax mr 0.4mg, and vomiting have been received during the postmarketing period. In the two U. In most of these cases, the alphablocker had been stopped recently prior to surgery 2 to 14 daysbut in a few cases, IFIS was reported after the patient had been off 0.4mg alpha-1 blocker for a longer period 5 weeks to 9 months. Are flomax any other precautions or warnings for this medication? The metabolites of tamsulosin hydrochloride undergo extensive conjugation to glucuronide or sulfate prior to renal excretion. In the two U. This is because nicotine irritates the bladder, flomax mr 0.4mg.
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