Drug NameHytrin (Terazosin) Drug UsesHytrin is used for treating high blood pressure and treating signs and symptoms of benign prostatic hyperplasia (BPH).
Hytrin is an alpha-blocker. It works by relaxing muscles in the blood vessels, resulting in lowering of blood pressure. In BPH, alpha-blockers work by relaxing muscles around the urethra (tube that drains urine from the bladder), which improves urinary symptoms. How to useTake this medication exactly as prescribed. Try to take it at the same time each day. Take the first dose at bedtime to minimize the chances of getting dizzy or fainting. Tablets may be taken with food or milk to avoid stomach upset. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick. Do not stop taking this medication without consulting your doctor. Some conditions may become worse when the drug is abruptly stopped. Your dose may need to be gradually decreased. Drug Class and MechanismHytrin belongs to a class of medications, called alpha 1 blockers which relaxes the smooth muscles of the arteries, the prostate, and the bladder neck. Other alpha blockers in the same class of drugs include doxazosin (Cardura), alfuzosin (Uroxatral), tamsulosin (Flomax), and prazosin (Minipress). Relaxing the smooth muscles of the arteries lowers blood pressure. Relaxing the smooth muscles around the bladder neck relieves urinary obstruction, caused by an enlarged prostate (prostate hypertrophy). Missed DoseIf you miss a dose, take as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up. Contact your doctor if 2 or more consecutive doses are missed. Storage Store at room temperature away from sunlight and moisture. Possible Side EffectsAll medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
- Dizziness; drowsiness; dry mouth; feeling of a whirling motion; headache; lightheadedness; nasal congestion; nausea; weakness.
Seek medical attention right away if any of these SEVERE side effects occur:
- Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); blurred vision; chest pain; decreased sexual ability; difficulty breathing; easy bleeding or bruising; fainting; painful penile erection; pounding or tightness in the chest; ringing in the ears; swelling of the hands or feet.
More InformationIt is important to have your blood pressure checked regularly while taking this medication. Learn how to monitor your blood pressure. Discuss this with your doctor or pharmacist. Warnings/PrecautionsSome medical conditions may interact with Hytrin . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have prostate cancer, angina pectoris, heart disease, or kidney or liver problems.
Some MEDICINES MAY INTERACT with Hytrin . Tell your health care provider if you are taking any other medicines, especially any of the following:
- Phosphodiesterase type 5 inhibitors (eg, sildenafil) or verapamil because severe dizziness, lightheadedness, or fainting may occur.
What is terazosin?
Terazosin is in a group of drugs called alpha-adrenergic blockers. Terazosin causes the blood vessels (veins and arteries) to relax and expand, improving blood flow. Terazosin also relaxes muscles in the prostate and bladder neck, making it easier to urinate.
Terazosin is used to treat hypertension (high blood pressure) and benign prostatic hyperplasia (enlarged prostate).
Terazosin may also be used for purposes other than those listed in this medication guide.
What is the most important information I should know about terazosin?
Before taking terazosin, tell your doctor if you use any other blood pressure medications, especially verapamil (Calan, Covera, Isoptin, Verelan). You may need a dosage adjustment if you take terazosin with other blood pressure medicines.
Terazosin lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or when you start taking it again. To avoid falling, take the first dose of terazosin at bedtime. You may wish to continue taking this medication only at bedtime if it causes you to feel light-headed.
You may feel very dizzy when you first wake up. Be careful when standing or sitting up from a lying position.
If you stopped taking terazosin for any reason and have started taking it again, you may feel especially dizzy or light-headed after your first few doses.
Terazosin can affect the pupils of your eyes during cataract surgery. If you have cataract surgery during your treatment with terazosin, tell the surgeon ahead of time that you take terazosin. Do not stop using the medication before surgery unless your surgeon tells you to.
What should I discuss with my healthcare provider before taking terazosin?
Terazosin can affect the pupils of your eyes during cataract surgery. If you have cataract surgery during your treatment with terazosin, tell the surgeon ahead of time that you take terazosin. Do not stop using the medication before surgery unless your surgeon tells you to.
FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment. It is not known whether terazosin passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
How should I take terazosin?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor.
Take each dose with a full glass of water. Terazosin lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or when you start taking it again. To avoid falling, take the first dose of terazosin at bedtime. You may wish to continue taking this medication only at bedtime if it causes you to feel light-headed.
You may feel very dizzy when you first wake up. Be careful when standing or sitting up from a lying position.
If you stopped taking terazosin for any reason and have started taking it again, you may feel especially dizzy or light-headed after your first few doses.
To be sure this medication is helping your condition, your blood pressure or prostate will need to be checked on a regular basis. It is important that you not miss any scheduled visits to your doctor.
If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms.
Store terazosin at room temperature away from moisture and heat.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
If you miss doses for several days in a row, call your doctor before taking any additional doses. You may need to use a lower dose of terazosin for a short time.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this medicine.
Symptoms of a terazosin overdose may include dizziness, fainting, shallow breathing, a weak but rapid pulse, and cold, clammy skin.
What should I avoid while taking terazosin?
Terazosin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid using other medicines that make you sleepy (such as cold medicine, pain medication, muscle relaxers, and medicine for seizures, depression or anxiety). They can add to sleepiness caused by terazosin.
Terazosin side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any of these serious side effects:
Other, less serious side effects may be more likely to occur, such as:
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
What other drugs will affect terazosin?
Before taking terazosin, tell your doctor if you use any other blood pressure medications, especially verapamil (Calan, Covera, Isoptin, Verelan). You may need a dosage adjustment if you take terazosin with other blood pressure medicines.
There may be other drugs that can affect terazosin. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
Where can I get more information?
- Your pharmacist has additional information about terazosin written for health professionals that you may read
What does my medication look like?
Terazosin is available with a prescription under the brand name Hytrin. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.
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Hytrin 1 mg--gray capsules
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Hytrin 2 mg--yellow capsules
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Hytrin 5 mg--red capsules
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Hytrin 10 mg--blue capsules
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