Common use

Phenergan Syrup (promethazine hydrochloride) is a versatile first-generation antihistamine prescribed for a wide range of conditions, including allergic reactions (seasonal and perennial allergic rhinitis, urticaria, contact dermatitis), hay fever, motion sickness, nausea and vomiting (including post-operative and drug-induced nausea), and as a mild sedative for pre- and post-operative use. Promethazine belongs to the phenothiazine class and works by blocking H1 histamine receptors, which reduces allergic symptoms such as sneezing, itching, runny nose, and watery eyes. It also affects cholinergic receptors and certain areas of the brain's vomiting center (the chemoreceptor trigger zone), providing effective antiemetic and sedative properties. The liquid syrup formulation is especially convenient for patients who have difficulty swallowing tablets, including children (over 2 years) and elderly patients. Buy Phenergan Syrup online at dutypills.ovh for affordable allergy and nausea relief with fast delivery.

Dosage and direction

Phenergan Syrup should be taken exactly as directed by your healthcare provider, using a proper measuring device (oral syringe or calibrated measuring cup) to ensure accurate dosing — do not use a household spoon. It is usually taken by mouth with or without food. For allergic conditions, the typical adult dose is 25 mg (10 mL) before bedtime, or 12.5 mg (5 mL) before meals and at bedtime if needed. For nausea and vomiting, 12.5 mg to 25 mg may be taken every 4 to 6 hours as needed. For motion sickness prevention, take the first dose 30 to 60 minutes before travel. Pediatric dosing is strictly weight-based and must be determined by a physician. Do not exceed the prescribed amount, as excessive doses can cause serious central nervous system depression, especially in children.

Precautions

Before using Phenergan, inform your doctor if you have asthma or chronic obstructive pulmonary disease (COPD), sleep apnea, respiratory depression, narrow-angle glaucoma, liver disease, seizure disorders, gastrointestinal obstruction, urinary retention, prostate enlargement, cardiovascular disease, bone marrow depression, or Reye's syndrome history. Promethazine causes significant drowsiness and impairs cognitive and motor function — avoid driving, operating heavy machinery, or performing tasks requiring mental alertness. Alcohol and other CNS depressants dramatically increase the sedative effects and should be strictly avoided during treatment. Use extreme caution in elderly patients, who are more susceptible to anticholinergic effects (confusion, dizziness, constipation, urinary retention) and respiratory depression.

Contraindications

Do not use Phenergan if you are allergic to promethazine or other phenothiazines. It is strictly contraindicated in children under 2 years of age due to the risk of fatal respiratory depression. Phenergan should not be used in individuals with severe central nervous system depression, comatose states, or lower respiratory tract conditions where respiratory depression could be dangerous (including acute asthma). Intra-arterial or subcutaneous injection is absolutely contraindicated due to the risk of severe tissue necrosis.

Possible side effect

Common side effects of Phenergan Syrup include drowsiness, sedation, dizziness, blurred vision, dry mouth, constipation, urinary retention, nasal congestion, and restlessness or agitation (paradoxical excitation, more common in children). Serious side effects requiring immediate medical attention include severe respiratory depression (especially in children or when combined with opioids), severe confusion or hallucinations, seizures, irregular or rapid heartbeat, jaundice (yellowing of skin or eyes), neuroleptic malignant syndrome (NMS — high fever, muscle rigidity, altered consciousness), and severe allergic reactions including angioedema and anaphylaxis. Seek emergency medical care if any serious symptoms develop.

Drug interaction

Phenergan may interact with CNS depressants including sedatives, hypnotics, opioid analgesics (codeine, morphine, fentanyl), benzodiazepines, barbiturates, general anesthetics, antidepressants (tricyclics, MAOIs), antipsychotics, muscle relaxants, seizure medications, and alcohol — all of which can dangerously potentiate respiratory depression and sedation. Anticholinergic medications used concurrently may increase side effects such as urinary retention, constipation, and cognitive impairment. Promethazine may also interfere with certain pregnancy tests and glucose tolerance tests. Inform your doctor about all medications, OTC products, and supplements you are taking.

Missed dose

If a dose is missed and you are taking Phenergan on a regular schedule, take it when you remember unless it is close to the next scheduled dose. In that case, skip the missed dose and continue your regular schedule. Do not double the dose. If you are using Phenergan only as needed, take a dose only when symptoms occur.

Overdose

Overdose symptoms of promethazine may include extreme drowsiness, deep sedation, confusion, agitation, slow or shallow breathing, seizures, dilated pupils, rapid heartbeat, or loss of consciousness. In severe cases, respiratory failure and death may occur, particularly in children. Seek emergency medical attention immediately. Treatment includes respiratory support, activated charcoal (if recent ingestion), and supportive care. There is no specific antidote.

Storage

Store Phenergan Syrup at controlled room temperature between 68°F and 77°F (20°C to 25°C), away from heat, direct light, and moisture. Keep the bottle tightly closed after each use. Do not freeze. Store securely out of the reach of children and pets.

Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.