Promethazine HCl Suppositories
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Promethazine HCl Suppositories
Promethazine HCl Suppositories Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Promethazine hydrochloride suppositories (Brand Names: Phenadoz, Promethegan) is a phenothiazine that works by changing the actions of chemicals in your brain, and also acts as an antihistamine, used to treat allergy symptoms such as itching, runny nose, sneezing, itchy or watery eyes, hives, and itchy skin rashes. Promethazine hydrochloride suppositories is also used to prevent motion sickness, treat nausea and vomiting or pain after surgery, and as a sedative or sleep aid. Promethazine hydrochloride suppositories are available in generic form. Common side effects of promethazine hydrochloride suppositories include dizziness, drowsiness, sleepiness, restlessness, blurred vision, dry mouth, stuffy nose, ringing in the ears, weight gain, swelling in hands or feet, impotence, trouble having an orgasm, or constipation.
The dose of promethazine depends on the condition being treated. Typical doses range from 12.5 mg to 25 mg, and may be taken once daily or several times per day, as prescribed. Promethazine may interact with cold or allergy medicine, sedatives, narcotics, sleeping pills, muscle relaxers, medicine for seizures, depression, lithium, atropine, belladonna, benztropine, dimenhydrinate, methscopolamine, scopolamine, blood pressure medications, blood thinners, bronchodilators, bladder or urinary medications, MAO inhibitors, medicines to treat Parkinson's disease, restless leg syndrome, or pituitary gland tumor, medicines to treat stomach ulcer or irritable bowel syndrome. Many other medicines can interact with promethazine. Tell your doctor all medications and supplements you use. During pregnancy, promethazine should be used only if prescribed. It is unknown if this drug passes into breast milk or if it could harm a nursing baby. Consult your doctor before breastfeeding.
Our Promethazine Hydrochloride Suppositories Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
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.
Stop using promethazine and call your doctor at once if you have any of these serious side effects:
- twitching, or uncontrollable movements of your eyes, lips, tongue, face, arms, or legs;
- tremor (uncontrolled shaking), drooling, trouble swallowing, problems with balance or walking;
- feeling restless, jittery, or agitated;
- high fever, stiff muscles, confusion, sweating, fast or uneven heartbeats, rapid breathing;
- feeling like you might pass out;
- seizure (convulsions);
- shallow breathing, weak pulse;
- pale skin, easy bruising or bleeding, fever, sore throat, flu symptoms;
- decreased night vision, tunnel vision, watery eyes, increased sensitivity to light;
- hallucinations, agitation;
- nausea and stomach pain, skin rash, and jaundice (yellowing of the skin or eyes);
- urinating less than usual or not at all;
- joint pain or swelling with fever, swollen glands, muscle aches, chest pain, vomiting, unusual thoughts or behavior, and patchy skin color; or
- slow heart rate, weak pulse, fainting, slow breathing (breathing may stop).
Less serious side effects may include:
- dizziness, drowsiness, sleepiness, or feeling restless;
- blurred vision, dry mouth, stuffy nose;
- ringing in your ears;
- weight gain, swelling in your hands or feet;
- impotence, trouble having an orgasm; or
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Read the entire detailed patient monograph for Promethazine HCl Suppositories (Promethazine Hydrochloride Suppositories)
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Promethazine HCl Suppositories FDA Prescribing Information: Side Effects
Central Nervous System
Drowsiness is the most prominent CNS effect of this drug. Sedation, somnolence, blurred vision, dizziness; confusion, disorientation, and extrapyramidal symptoms such as oculogyric crisis, torticollis, and tongue protrusion; lassitude, tinnitus, incoordination, fatigue, euphoria, nervousness, diplopia, insomnia, tremors, convulsive seizures, excitation, catatonic-like states, hysteria. Hallucinations have also been reported.
Hyperexcitability and abnormal movements have been reported in patients following a single administration of promethazine HCl. Consideration should be given to the discontinuation of promethazine HCl and to the use of other drugs if these reactions occur. Respiratory depression, nightmares, delirium, and agitated behavior have also been reported in some of these patients.
Read the entire FDA prescribing information for Promethazine HCl Suppositories (Promethazine Hydrochloride Suppositories)
Additional Promethazine HCl Suppositories Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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