Pr4 Sr

Pr4 Sr Uses, Dosage, Side Effects, Food Interaction and all others data.

Pr4 Sr is a non-cardioselective β-blocker that competitively blocks β1- and β2-receptors resulting in decreased heart rate, myocardial contractility, BP and myocardial oxygen demand. It has membrane-stabilising properties.

Pr4 Sr is a beta-adrenergic receptor antagonist used to treat hypertension. Pr4 Sr has a long duration of action as it is given once or twice daily depending on the indication. When patients abruptly stop taking propranolol, they may experience exacerbations of angina and myocardial infarctions.

Trade Name Pr4 Sr
Availability Prescription only
Generic Propranolol
Propranolol Other Names beta-Propranolol, Propanalol, Propanolol, Propranolol, Propranololo, Propranololum
Related Drugs amlodipine, aspirin, lisinopril, metoprolol, losartan, furosemide, carvedilol, hydrochlorothiazide, Xarelto, clopidogrel
Type Sr Capsule
Formula C16H21NO2
Weight Average: 259.3434
Monoisotopic: 259.157228921
Protein binding

Approximately 90% of propranolol is protein bound in plasma. Other studies have reported ranges of 85-96%.

Groups Approved, Investigational
Therapeutic Class Beta-adrenoceptor blocking drugs, Beta-blockers
Manufacturer Triko Pharmaceuticals
Available Country India
Last Updated: September 19, 2023 at 7:00 am
Pr4 Sr
Pr4 Sr

Uses

Pr4 Sr is used for:

  • essential and renal hypertension
  • angina pectoris
  • long term prophylaxis after recovery from acyte myocardial infarction
  • cardiac dysrhythmia
  • prophylaxis of migraine
  • essential tremor
  • anxiety and anxiety tachycardia
  • adjunctive management of thyrotoxicosis and thyrotoxic crisis
  • hypertrophic obstructive cardiomyopathy
  • phaeochromocytoma (with α-blocker)

Pr4 Sr is also used to associated treatment for these conditions: Akathisia caused by antipsychotic use, Angina Pectoris, Atrial Fibrillation, Cardiovascular Mortality, Gastroesophageal variceal hemorrhage prophylaxis, Hemangiomas, High Blood Pressure (Hypertension), Migraine, Myocardial Infarction, Obstructive Hypertrophic Cardiomyopathy, Performance Anxiety, Pheochromocytomas, Proliferating Infantile Hemangioma, Supraventricular Arrhythmias, Tachyarrhythmia caused by Digitalis intoxication, Tachyarrhythmia caused by catecholamine excess, Thyroid Crisis, Thyrotoxicosis, Tremor caused by lithium, Tremor, Essential, Ventricular Tachycardia (VT)

How Pr4 Sr works

Pr4 Sr is a nonselective β-adrenergic receptor antagonist. Blocking of these receptors leads to vasoconstriction, inhibition of angiogenic factors like vascular endothelial growth factor (VEGF) and basic growth factor of fibroblasts (bFGF), induction of apoptosis of endothelial cells, as well as down regulation of the renin-angiotensin-aldosterone system.

Dosage

Pr4 Sr dosage

Tablet:

Adults:

  • Hypertension: A starting dose of 80 mg twice a day may increased at weekly intervals according to response. The usual dose range is 160-320 mg per day. With concurrent diuretic or other antihypertensive drugs a further reduction of blood pressure is obtained.
  • Angina, anxiety, migraine and essential tremor: A staring dose of 40 mg two or three times daily may be increased by the same amount at weekly intervals according to patients response. An adequate response in anxiety, migraine and essential tremor is usually seen in the range 80-160 mg/day and an angina in the range 120-240 mg/day.
  • Situational and generalized anxiety: A dose of 40 mg daily may provide short term relief of acute situational anxiety. Generalized anxiety require long term therapy, usually responds adequately to 40 mg twice daily which ,which individual cases, may be increased to 40 mg three times daily. Treatment should be continued according to responses. Patients should reviewed after 6 to 12 months treatment.
  • Dysrhythmias, anxiety tachycardia, hypertrophic obstructive cardiomyopathy and thyrotoxicosis: A dosage range of 10-40 mg three or four times a day usually achieves the required response.
  • Post myocardial infarction: Treatment should be started between days 5 and after 21 after myocardial infarction, with an initial dose of 40 mg four times a day for 2 or 3 days. In order to improve compliance the total daily doses three after be given as 80 mg twice a day. Phaeochromocytoma (Used only with an alpha receptor blocking drug).
  • Pre-operative: 60 mg daily for three days.
  • Non-operable malignant cases: 30 mg daily.
  • Migraine: Under 12 years: 20 mg two or three times daily. Over 12 years : The adult dose.

Children:

  • Sysrhythmias, Phaeochromocytoma, Thyrotoxicisis: Dosage should be individually determined and the following is only a guide 0.25-0.5 mg/kg three or four times daily as required.

Sustained Release Capsule:

Adult:

  • Hypertension: The usual initial dose is 80mg Pr4 Sr SR once daily, whether used alone or added to a diuretic. The usual maintenance dosage is 120 to 160 mg once daily.
  • Angina pectoris: Starting with 80mg Pr4 Sr SR once daily, dosage should be gradually increased three to seven day intervals until optimum response is obtained.
  • Migraine: The initial oral dose is 80 mg Pr4 Sr SR once daily. T he usual effective dose range is 160 to 240 mg once daily. It may be advisable to withdraw the drug gradually over a period of several weeks.
  • Hypertrophic subaortic stenosis: 80 mg Pr4 Sr SR once daily

Injection:

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

The usual dose is 1 to 3 mg administered under careful monitoring, such as electrocardiography and central venous pressure. The rate of administration should not exceed 1 mg (1 mL) per minute to diminish the possibility of lowering blood pressure and causing cardiac standstill.

Sufficient time should be allowed for the drug to reach the site of action even when a slow circulation is present. If necessary, a second dose may be given after two minutes. Thereafter, additional drug should not be given in less than four hours. Additional propranolol hydrochloride should not be given when the desired alteration in rate or rhythm is achieved.

Transfer to oral therapy as soon as possible.

Side Effects

Pr4 Sr is usually well tolerated. Minor side effects such as cold extremities, nausea, diarrhea, sleep disturbances and lassitude are often transient. There have been reports of skin rashes and/or dry eyes associated with the use of beta-adrenergic blocking drugs.

Toxicity

Symptoms of overdose include hypotension, hypoglycemic seizure, restlessness, euphoria, insomnia. Patients with asthma may develop bronchospasm. In case of overdose, monitor vital signs, mental status, and blood glucose. Treat hypotension with intravenous fluids, bradycardia with atropine, and isoproterenol and aminophylline for bronchospasm. If patients do not respond to intravenous fluids, follow up with glucagon 50-150µg/kg intravenously, then 1-5mg/hour, followed by catecholamines. Dialysis will not be useful as propranolol is highly protein bound.

Precaution

Beta-adrenoceptor blocking drugs should be avoided in over heart failure. Pr4 Sr modifies the tachycardia of hypoglycaemic therapy in diabetic patients. Pr4 Sr may prolong the hypoglycaemic response to insulin.

Interaction

Beta-adrenoceptor blocking drugs interact with clonidine.If beta-adrenoceptor blocking drugs and clonidine are given concurrently, clonidine should be discontinued until several days after withdrawal of beta-adrenoceptor blocking drug. Care should be taken in prescribing a beta-adrenoceptor blocking drugs with class 1 antidysrhythmic agents (disopyramide).Beta-adrenoceptor blocking drugs should be used with caution in combination with verapamil in patients with impaired ventricular function.

Food Interaction

  • Avoid alcohol. Alcohol increases propranolol plasma concentrations.
  • Avoid natural licorice. Natural licorice inhibits the metabolism of propranolol, increasing drug exposure.
  • Take with food.

[Moderate] ADJUST DOSING INTERVAL: The bioavailability of propranolol may be enhanced by food.



MANAGEMENT: Patients may be instructed to take propranolol at the same time each day, preferably with or immediately following meals.

Pr4 Sr Alcohol interaction

[Moderate]

Many psychotherapeutic and CNS-active agents (e.g., anxiolytics, sedatives, hypnotics, antidepressants, antipsychotics, opioids, alcohol, muscle relaxants) exhibit hypotensive effects, especially during initiation of therapy and dose escalation.

Coadministration with antihypertensives and other hypotensive agents, in particular vasodilators and alpha-blockers, may result in additive effects on blood pressure and orthostasis.

Caution and close monitoring for development of hypotension is advised during coadministration of these agents.

Some authorities recommend avoiding alcohol in patients receiving vasodilating antihypertensive drugs.

Patients should be advised to avoid rising abruptly from a sitting or recumbent position and to notify their physician if they experience dizziness, lightheadedness, syncope, orthostasis, or tachycardia.

Pr4 Sr Cholesterol interaction

[Moderate] Beta-adrenergic receptor blocking agents (aka beta-blockers) may alter serum lipid profiles.

Increases in serum VLDL and LDL cholesterol and triglycerides, as well as decreases in HDL cholesterol, have been reported with some beta-blockers.

Patients with preexisting hyperlipidemia may require closer monitoring during beta-blocker therapy, and adjustments made accordingly in their lipid-lowering regimen.

Pr4 Sr multivitamins interaction

[Moderate] ADJUST DOSING INTERVAL: Concurrent administration with calcium salts may decrease the oral bioavailability of atenolol and possibly other beta-blockers.

The exact mechanism of interaction is unknown.

In six healthy subjects, calcium 500 mg (as lactate, carbonate, and gluconate) reduced the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of atenolol (100 mg) by 51% and 32%, respectively.

The elimination half-life increased by 44%.

Twelve hours after the combination, beta-blocking activity (as indicated by inhibition of exercise tachycardia) was reduced compared to that with atenolol alone.

However, during a 4-week treatment in six hypertensive patients, there was no difference in blood pressure values between treatments.

The investigators suggest that prolongation of the elimination half-life induced by calcium coadministration may have led to atenolol cumulation during long-term dosing, which compensated for the reduced bioavailability.

It may help to separate the administration times of beta-blockers and calcium products by at least 2 hours.

Patients should be monitored for potentially diminished beta-blocking effects following the addition of calcium therapy.

Volume of Distribution

The volume of distribution of propranolol is approximately 4L/kg or 320L.

Elimination Route

Patients taking doses of 40mg, 80mg, 160mg, and 320mg daily experienced Cmax values of 18±15ng/mL, 52±51ng/mL, 121±98ng/mL, and 245±110ng/mL respectively. Pr4 Sr has a Tmax of approximately 2 hours, though this can range from 1 to 4 hours in fasting patients. Taking propranolol with food does not increase Tmax but does increase bioavailability.

Half Life

The elimination half life of propranolol is approximately 8 hours. The plasma half life of propranolol is 3 to 6 hours.

Clearance

The clearance of propranolol is 2.7±0.03L/h/kg in infants 90 days. Pr4 Sr clearance increases linearly with hepatic blood flow. Propanolol has a clearance in hypertensive adults of 810mL/min.

Elimination Route

91% of an oral dose of propranolol is recovered as 12 metabolites in the urine.

Pregnancy & Breastfeeding use

There are no adequate and controlled studies in pregnant women. Pr4 Sr is excreted in human milk. Caution should be exercised when propranolol is administered to a nursing mother.

Contraindication

Pr4 Sr Hydrochloride is contraindicated in patients with known Hypersensitivity to any component of the formulation. If there is a history of bronchial asthma of bronchospasm.

Acute Overdose

The symptoms of over dosage may include bradycardia, hypotension, acute cardiac insufficiency and bronchospasm. Treatment of over dosage include close supervision, treatment in an intensive care ward, he use of gastric lavage, activated charcoal and a laxative to prevent absorption of any drug still present in the gastrointestinal tract, the use of plasma or plasma substitutes to treat hypotension and shock.

Storage Condition

Store in a cool dry place. Protect from light.

Innovators Monograph

You find simplified version here Pr4 Sr

Pr4 Sr contains Propranolol see full prescribing information from innovator Pr4 Sr Monograph, Pr4 Sr MSDS, Pr4 Sr FDA label

FAQ

What is Pr4 Sr usually prescribed for?

Pr4 Sr usually prescribed for high blood pressure and other heart problems, but it can also help with the physical signs of anxiety, like sweating and shaking.Pr4 Sr slows down your heart rate and makes it easier for your heart to pump blood around your body. 

Is Pr4 Sr good for anxiety?

Pr4 Sr blocks the physical effects of anxiety, meaning you won't experience an increased heart rate, sweating and shakiness when you feel nervous. By blocking the physical symptoms of anxiety, propranolol can help you feel calmer, less nervous and more composed.

When should not I take Pr4 Sr?

You should not use Pr4 Sr if you are allergic to it, or if you have:

  • asthma;
  • very slow heart beats that have caused you to faint; or.
  • a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker).

Can I take Pr4 Sr every day?

Pr4 Sr can be used daily for migraine prevention. It's only approved for prevention and shouldn't be used to stop a migraine that's already started. A common starting dose for migraine prevention is 80 mg per day, broken up into smaller, equal size doses throughout the day.

What time of day should I take Pr4 Sr?

Pr4 Sr extended release capsules should be taken at bedtime (10 pm). This medicine may be taken with or without food. However, you should take it the same way each time.

Does Pr4 Sr help me sleep?

Brand as well as other beta blockers, has been shown in some studies to reduce your body's secretion of melatonin an important hormone for optimal sleep. For a small percentage of propranolol users, this can lead to difficulties falling and staying asleep.

What are the worst side effects of Pr4 Sr?

Serious side effects of Pr4 Sr:

  • Hallucinations.
  • Cold hands or feet.
  • Muscle weakness.
  • Muscle cramps.
  • Shortness of breath.
  • Memory loss.
  • Fluid retention.
  • Blood sugar changes.

What can't I take with Pr4 Sr?

Some products that may interact with this drug include: alpha blockers (e.g., prazosin), aluminum hydroxide, anticholinergics (e.g., atropine, scopolamine), chlorpromazine, drugs affecting liver enzymes that remove Pr4 Sr from your body such as cimetidine, St.

What should be checked before giving Pr4 Sr?

Before administering Pr4 Sr, the nurse should always assess the patient's blood pressure and apical pulse.

Can Pr4 Sr harm for me?

Pr4 Sr may cause heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort, dilated neck veins, extreme fatigue, irregular breathing, an irregular heartbeat, swelling of the face, fingers, feet, or lower legs, or weight gain.

Can Pr4 Sr cause stroke?

Pr4 Sr will comes with serious risks if you don't take it as prescribed. If you don't take it at all: Your condition will get worse and you may be at risk of serious heart problems, such as heart attack or stroke.

Does Pr4 Sr affect breathing?

Pr4 Sr has a "nonselective" action. This means that it also blocks beta-2 receptors in the bronchioles, which can cause a narrowing of the bronchioles which may cause breathing difficulties in people with pre-existing lung disease.

Does Pr4 Sr cause hair loss?

Pr4 Sr is one of several beta blockers that can cause hair loss. The hair loss from Pr4 Sr is not permanent and is typically a result of the medication causing some hair follicles to enter their shedding phase prematurely.

Can I drink alcohol with Pr4 Sr?

Mixing Pr4 Sr and alcohol is generally not advised by doctors or medical experts. This is because beta-blockers like Pr4 Sr lower your blood pressure by slowing your heart rate and reducing the force of each beat. Alcohol can also lower your blood pressure.

How many hours does Pr4 Sr last?

Pr4 Sr is usually taken once a day, and the effects last for 24 hours.

Is Pr4 Sr addictive?

Pr4 Sr is not a physically addictive, habit-forming medication. 

What foods interact with Pr4 Sr?

Caffeine-containing food items and beverages when taken along with Pr4 Sr may decrease the effectiveness of the drug. It is better to avoid tea or coffee while taking Pr4 Sr.

How much does Pr4 Sr lower pulse?

The effects of oral Pr4 Sr were evaluated in 10 normal volunteers. The resting heart rate decreased from the mean control value of 68 plus or minus 3.3 (SE) to 56 plus or minus 2.8 beats per minute (bpm) on Pr4 Sr (p smaller than 0.001, paired test).

What is the antidote for Pr4 Sr?

Isoprenaline proved to be the best antidote for the treatment of Pr4 Sr intoxication antagonizing the bradycardia by 76% and the hypotension completely.

What is Pr4 Sr used for in mental health?

Pr4 Sr has been used for many years to treat high blood pressure and heart disease, and has been found useful in treating anxiety states such as social phobia and migraine.
Pr4 Sr for the Treatment of Acute Stress Disorder.

Can I Pr4 Sr if I have asthma?

Despite safety concerns, Pr4 Sr is still prescribed to some people with asthma and anxiety. Brand exposure is associated with an increased risk of asthma hospitalisation in susceptible people which appears to vary by dose and duration of exposure.

Can Pr4 Sr disturb sleep?

For a small percentage of Pr4 Sr users, this can lead to difficulties falling and staying asleep. Pr4 Sr is also linked to other sleep related issues, including nightmares and drowsiness. Like fatigue, sleep issues from Pr4 Sr are most common shortly after you start to use the medication.

Can Pr4 Sr cause permanent damage?

If it continues for a long time, the heart and arteries may not function properly. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure.

Does Pr4 Sr affect appetite?

Pr4 Sr does effected depression,confusion, hallucinations; liver problems--nausea, upper stomach pain, itching, tired feeling, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);

Can Pr4 Sr cause death?

We report on an 18-year-old man who ingested a massive dose of Pr4 Sr HCl in a suicide attempt. The patient was brought to the hospital in an unresponsive state within 30 minutes of ingestion. He was initially stabilized but subsequently died nine hours after the drug was ingested.

Can Pr4 Sr damage my heart?

Brand may cause heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort, dilated neck veins, extreme fatigue, irregular breathing, an irregular heartbeat, swelling of the face, fingers, feet, or lower legs, or weight gain.

Can Pr4 Sr affect my eyesight?

This Pr4 Sr can cause certain eye problems. If left untreated, this can lead to lasting eyesight loss. If eye problems happen, signs like change in eyesight or eye pain most often happen within hours to weeks of starting Pr4 Sr and hydrochlorothiazide. Call your doctor right away if you have these signs

What happens if I stop taking Pr4 Sr suddenly?

While stopping any beta-blocker may cause a mild response, abruptly stopping Pr4 Sr may lead to a withdrawal syndrome. Beta-blocker withdrawal can result in a rise in blood pressure, and in patients with heart disease, chest pain, heart attack, and even sudden death.

Is Pr4 Sr bad for my kidneys?

Pr4 Sr types of beta-blockers may reduce cardiac output and subsequently renal perfusion pressure, thereby exacerbating renal dysfunction.

Is Pr4 Sr safe during pregnancy?

Pr4 Sr has been used safely to treat a variety of conditions during pregnancy, including hypertension and pheochromocytoma in the mother, and tachyarrhythmias in both the mother and fetus. There are a number of abnormalities associated with the use of Pr4 Sr during pregnancy, but many of these may be attributable to underlying diseases. These abnormalities include some signs of beta-blockade, such as bradycardia, hypoglycemia, and respiratory depression. Other abnormalities that may be due to Pr4 Sr include intrauterine growth retardation, small placentas, polycythemia, thrombocytopenia, and hypocalcemia.

Is Pr4 Sr to safe during breastfeeding?

Pr4 Sr is not recommended for mothers who are breastfeeding because it could potentially cause the baby's heart rate to slow down or its blood sugar to fall.

*** Taking medicines without doctor's advice can cause long-term problems.
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