Phenergan Plus Syrup

Introduction

Phenylephrine and Promethazine is a combination medication used to relieve symptoms associated with allergies, colds, and respiratory infections. Phenylephrine is a decongestant, while Promethazine is an antihistamine with sedative properties.

Uses

This combination is commonly used to treat symptoms such as nasal congestion, runny nose, sneezing, and itchy or watery eyes caused by allergies or the common cold. It may also be used to alleviate cough associated with upper respiratory tract infections.

Brand Name	Phenergan Plus
Type	Syrup
Weight	(5 mg+6.25 mg)/5 ml
Generic	Phenylephrine + Promethazine
Manufacturer	Synovia Pharma PLC.
Available in	English বাংলা

Mechanism of Action

Phenylephrine works by constricting blood vessels in the nasal passages, which reduces swelling and congestion. Promethazine, on the other hand, blocks histamine receptors (H1 receptors) and has a sedative effect, which helps to reduce allergic symptoms and provides relief from cough.

How Long Does It Take to Work?

The onset of action for Phenylephrine is typically within 30 minutes, with peak effects occurring within 1-2 hours. Promethazine may take a bit longer, with relief often seen within 1-2 hours of administration. Full effects may take several hours to be fully realized.

Absorption

Phenylephrine is absorbed rapidly from the gastrointestinal tract when taken orally. Promethazine is also well-absorbed and reaches peak plasma levels within 1-2 hours after oral administration.

Route of Elimination

Phenylephrine is primarily metabolized in the liver and excreted in the urine. Promethazine is metabolized in the liver as well, and its metabolites are excreted in the urine and feces.

Dosage

Adults and children 12 years and over: 1 teaspoonful (5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.

Children 6 to under 12 years of age: ½ to 1 teaspoonful (2.5 to 5 mL) every 4 to 6 hours, not to exceed 6 teaspoonsful (30 mL) in 24 hours.

Children 2 to under 6 years of age: ¼ to ½ teaspoonful (1.25 to 2.5 mL) every 4 to 6 hours.

Children under 2 years of age: Promethazine and Phenylephrine are not recommended for children under 2 years of age.

The dosage of Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml varies depending on the specific formulation and the severity of symptoms. Typically, the recommended dosage for adults is 10-20 mg of Phenylephrine and 12.5-25 mg of Promethazine every 4-6 hours as needed. Dosage for children should be determined by a healthcare provider based on age and weight.

Administration

The medication is usually administered orally in the form of tablets or liquid. It should be taken with water and can be taken with or without food. Adherence to dosing intervals is important for effectiveness and to minimize side effects.

Side Effects

Common side effects include drowsiness, dizziness, dry mouth, and constipation. Phenylephrine may cause increased blood pressure or palpitations. Rare but serious side effects may include severe allergic reactions, difficulty breathing, or severe dizziness.

Toxicity

Symptoms of toxicity may include severe drowsiness, hallucinations, high blood pressure, or severe dry mouth. In case of suspected overdose, seek medical attention immediately. Treatment involves supportive care and symptomatic management.

Precautions

Use with caution in patients with hypertension, heart disease, or other cardiovascular conditions. Promethazine may impair the ability to drive or operate machinery. Avoid alcohol and other central nervous system depressants while taking this medication.

Interaction

Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml may interact with other medications, including other antihistamines, decongestants, or medications that affect blood pressure. It is important to inform your healthcare provider of all medications you are taking.

Disease Interaction

Use with caution in patients with a history of respiratory conditions, such as asthma or chronic obstructive pulmonary disease (COPD), as Promethazine may cause respiratory depression. It should also be used cautiously in patients with liver or kidney impairment.

Drug Interaction

Drug interactions may occur with other antihistamines, sedatives, or medications that affect blood pressure or heart rate. Phenylephrine can interact with monoamine oxidase inhibitors (MAOIs) and other drugs affecting the adrenergic system. Promethazine may interact with other central nervous system depressants, including alcohol and benzodiazepines.

Food Interactions

There are no specific food interactions with Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml. However, it is advisable to avoid alcohol as it can increase the sedative effects of Promethazine.

Pregnancy Use

Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml should be used during pregnancy only if the benefits outweigh the risks. Phenylephrine is categorized as Category C, and Promethazine is also Category C. Consult your healthcare provider before using this medication during pregnancy.

Lactation Use

Both Phenylephrine and Promethazine are excreted in breast milk. It is generally recommended to avoid using this medication while breastfeeding unless the benefits outweigh the risks. Consult with a healthcare provider for alternatives.

Acute Overdose

Acute overdose may lead to severe drowsiness, hallucinations, high blood pressure, or severe dry mouth. In the case of overdose, seek immediate medical attention. Treatment typically involves supportive care and monitoring.

Contraindication

This combination is contraindicated in individuals with hypersensitivity to Phenylephrine, Promethazine, or any other components of the medication. It should not be used in patients with severe hypertension, narrow-angle glaucoma, or those taking MAOIs.

Use Direction

Follow the prescribed dosage and administration instructions. Do not exceed the recommended dose and avoid alcohol and other CNS depressants. Contact your healthcare provider if symptoms persist or worsen.

Storage Conditions

Store Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml at room temperature, away from light and moisture. Keep out of reach of children and do not use past the expiration date. Dispose of any unused medication properly.

Volume of Distribution

The volume of distribution for Phenylephrine is approximately 2.7 liters/kg, while for Promethazine, it is about 10 liters/kg, reflecting their distribution in body tissues.

Half Life

The half-life of Phenylephrine is approximately 2.5-3 hours, while Promethazine has a half-life of about 10-19 hours, depending on individual metabolism and other factors.

Clearance

Phenylephrine is cleared primarily through the liver and kidneys, with a clearance rate of about 0.1 L/min. Promethazine is also cleared by the liver, with its clearance rate being affected by liver function and other factors.

See in details version Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml also Phenergan Plus Syrup (5 mg+6.25 mg)/5 ml in bangla