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What is Terazosin
Terazosin is an alpha-adrenergic blocking agent used in the treatment of hypertension and benign prostatic hypertrophy (BPH).
It is classified as a quinazoline and is similar to doxazosin and prazosin.
The duration of action of terazosin is longer than that of prazosin but shorter than that of doxazosin. In a head-to-head comparison with finasteride, terazosin achieved superior results in the management of BPH.
Terazosin was FDA-approved for hypertension in August 1987 and for BPH in 1993. The patent expired in 1997.
Brand Name
Hytrin
Side Effects
- abdominal pain
- amblyopia
- anaphylactoid reactions
- anxiety
- arthralgia
- arthropathy
- asthenia
- atrial fibrillation
- back pain
- blurred vision
- chest pain (unspecified)
- conjunctivitis
- constipation
- cough
- depression
- diarrhea
- dizziness
- drowsiness
- dyspepsia
- dyspnea
- edema
- epistaxis
- fever
- flatulence
- floppy iris syndrome
- gout
- headache
- hyperhidrosis
- impotence (erectile dysfunction)
- increased urinary frequency
- infection
- influenza
- insomnia
- libido decrease
- myalgia
- nasal congestion
- nausea
- orthostatic hypotension
- palpitations
- paresthesias
- peripheral edema
- peripheral vasodilation
- pharyngitis
- priapism
- pruritus
- rash
- rhinitis
- sinus tachycardia
- sinusitis
- syncope
- thrombocytopenia
- tinnitus
- urinary incontinence
- vertigo
- visual impairment
- vomiting
- weight gain
- xerostomia
Monitoring Parameters
- blood pressure
Contraindications
- angina
- breast-feeding
- geriatric
- ocular surgery
- orthostatic hypotension
- pregnancy
- priapism
- syncope
Interactions
- Acetaminophen; Chlorpheniramine; Dextromethorphan; Phenylephrine
- Acetaminophen; Chlorpheniramine; Dextromethorphan; Pseudoephedrine
- Acetaminophen; Chlorpheniramine; Phenylephrine; Phenyltoloxamine
- Acetaminophen; Dextromethorphan; Guaifenesin; Phenylephrine
- Acetaminophen; Dextromethorphan; Phenylephrine
- Acetaminophen; Dextromethorphan; Pseudoephedrine
- Acetaminophen; Dichloralphenazone; Isometheptene
- Acetaminophen; Guaifenesin; Phenylephrine
- Acetaminophen; Pseudoephedrine
- Acrivastine; Pseudoephedrine
- Aldesleukin, IL-2
- Alemtuzumab
- Alfuzosin
- Alprostadil
- Amifostine
- Amobarbital
- Amphetamines
- Amyl Nitrite
- Apomorphine
- Apraclonidine
- Aripiprazole
- Articaine; Epinephrine
- Asenapine
- Avanafil
- Baclofen
- Beta-blockers
- Bortezomib
- Bosentan
- Brexpiprazole
- Brompheniramine; Carbetapentane; Phenylephrine
- Brompheniramine; Hydrocodone; Pseudoephedrine
- Brompheniramine; Pseudoephedrine
- Cabergoline
- Carbetapentane; Chlorpheniramine; Phenylephrine
- Carbetapentane; Diphenhydramine; Phenylephrine
- Carbetapentane; Guaifenesin; Phenylephrine
- Carbetapentane; Phenylephrine
- Carbetapentane; Phenylephrine; Pyrilamine
- Carbetapentane; Pseudoephedrine
- Carbinoxamine; Dextromethorphan; Pseudoephedrine
- Carbinoxamine; Hydrocodone; Phenylephrine
- Carbinoxamine; Hydrocodone; Pseudoephedrine
- Carbinoxamine; Phenylephrine
- Carbinoxamine; Pseudoephedrine
- Cariprazine
- Cetirizine; Pseudoephedrine
- Chlophedianol; Dexchlorpheniramine; Pseudoephedrine
- Chlophedianol; Guaifenesin; Phenylephrine
- Chlorpheniramine; Dextromethorphan; Phenylephrine
- Chlorpheniramine; Dihydrocodeine; Phenylephrine
- Chlorpheniramine; Dihydrocodeine; Pseudoephedrine
- Chlorpheniramine; Guaifenesin; Hydrocodone; Pseudoephedrine
- Chlorpheniramine; Hydrocodone; Phenylephrine
- Chlorpheniramine; Hydrocodone; Pseudoephedrine
- Chlorpheniramine; Phenylephrine
- Chlorpheniramine; Pseudoephedrine
- Co-Enzyme Q10, Ubiquinone
- Codeine; Phenylephrine; Promethazine
- Conivaptan
- Desloratadine; Pseudoephedrine
- Dexchlorpheniramine; Dextromethorphan; Pseudoephedrine
- Dexmethylphenidate
- Dextromethorphan; Diphenhydramine; Phenylephrine
- Dextromethorphan; Guaifenesin; Phenylephrine
- Dextromethorphan; Guaifenesin; Pseudoephedrine
- Dextromethorphan; Quinidine
- Diazoxide
- Diethylpropion
- Dihydrocodeine; Guaifenesin; Pseudoephedrine
- Diphenhydramine; Hydrocodone; Phenylephrine
- Diphenhydramine; Phenylephrine
- Dobutamine
- Dopamine
- Drospirenone; Ethinyl Estradiol
- Drospirenone; Ethinyl Estradiol; Levomefolate
- Duloxetine
- Dutasteride; Tamsulosin
- Enflurane
- Ephedrine
- Epinephrine
- Epoprostenol
- Estradiol
- Estradiol Cypionate; Medroxyprogesterone
- Ethanol
- Ethinyl Estradiol
- Ethinyl Estradiol; Desogestrel
- Ethinyl Estradiol; Ethynodiol Diacetate
- Ethinyl Estradiol; Etonogestrel
- Ethinyl Estradiol; Levonorgestrel
- Ethinyl Estradiol; Levonorgestrel; Ferrous bisglycinate
- Ethinyl Estradiol; Levonorgestrel; Folic Acid; Levomefolate
- Ethinyl Estradiol; Norelgestromin
- Ethinyl Estradiol; Norethindrone
- Ethinyl Estradiol; Norethindrone Acetate
- Ethinyl Estradiol; Norethindrone Acetate; Ferrous fumarate
- Ethinyl Estradiol; Norethindrone; Ferrous fumarate
- Ethinyl Estradiol; Norgestimate
- Ethinyl Estradiol; Norgestrel
- Etomidate
- Fexofenadine; Pseudoephedrine
- Finasteride
- Fluoxetine; Olanzapine
- Fospropofol
- General anesthetics
- Guaifenesin; Hydrocodone; Pseudoephedrine
- Guaifenesin; Phenylephrine
- Guaifenesin; Pseudoephedrine
- Haloperidol
- Halothane
- Hydralazine; Isosorbide Dinitrate, ISDN
- Hydrocodone; Phenylephrine
- Hydrocodone; Potassium Guaiacolsulfonate; Pseudoephedrine
- Hydrocodone; Pseudoephedrine
- Ibuprofen; Pseudoephedrine
- Iloperidone
- Iloprost
- Isocarboxazid
- Isoflurane
- Isoproterenol
- Isosorbide Dinitrate, ISDN
- Isosorbide Mononitrate
- Ketamine
- Lofexidine
- Loratadine; Pseudoephedrine
- Lovastatin; Niacin
- Lurasidone
- Mestranol; Norethindrone
- Methohexital
- Methylphenidate
- Midodrine
- Milrinone
- Naproxen; Pseudoephedrine
- Nesiritide, BNP
- Niacin, Niacinamide
- Niacin; Simvastatin
- Nicotine
- Nitrates
- Nitroglycerin
- Nitroprusside
- Nonsteroidal antiinflammatory drugs
- Norepinephrine
- Olanzapine
- Oxymetazoline
- Paliperidone
- Pentoxifylline
- Phendimetrazine
- Phenelzine
- Phentermine
- Phentermine; Topiramate
- Phenylephrine
- Phenylephrine; Promethazine
- Prilocaine; Epinephrine
- Procainamide
- Procaine
- Propofol
- Pseudoephedrine
- Quinidine
- Rasagiline
- Risperidone
- Ritodrine
- Segesterone Acetate; Ethinyl Estradiol
- Selegiline
- Sevoflurane
- Sildenafil
- Silodosin
- Tadalafil
- Tamsulosin
- Tetrabenazine
- Tetracaine
- Thalidomide
- Thiopental
- Thiothixene
- Tizanidine
- Trandolapril; Verapamil
- Tranylcypromine
- Trazodone
- Vardenafil
- Verapamil
- Yohimbine
- Ziprasidone