What is Ryvent: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Ryvent overview

BRAND NAMES:

  • Palgic, RyVent, Karbinal ER

Generic Names:

  • Carbinoxamine Maleate

Uses:

  • Treats allergic reactions. This medicine is an antihistamine.

Therapeutic Classes:

  • Cold/Cough Agent, Respiratory Agent

Forms:

  • Capsule, Long Acting Capsule, Tablet, Liquid, Long Acting Tablet

How it’s taken:

  • By mouth

What is Ryvent used for?

RyVent is a prescription drug used to treat symptoms of allergies such as watery eyes, rash, cough, sneezing, runny nose, and itchy eyes/nose/throat/skin. This medication works to prevent a natural substance (histamine) in the body from causing an allergic reaction. RyVent also relieves hay fever and the common cold.

What form(s) does Ryvent come in

  • Capsule

  • Long Acting Capsule

  • Tablet

  • Liquid

  • Long Acting Tablet

What are common Ryvent doses?

  • Tablet 6MG

Common Ryvent prescriptions

  • RyVent
    6mg tablet

How to take Ryvent

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

  • Oral routeIt is best to take this medicine on an empty stomach.

  • You may break the tablet in half to make it easier to take, but do not crush or chew it.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. The teaspoons and tablespoons used for serving and eating food do not measure exact amounts.

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. The teaspoons and tablespoons used for serving and eating food do not measure exact amounts.

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Oral routeIt is best to take this medicine on an empty stomach.

  • You may break the tablet in half to make it easier to take, but do not crush or chew it.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

What to do if you miss a dose of Ryvent

Ryvent contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to carbinoxamine or you are breastfeeding.

Ryvent warnings

  • Tell your doctor if you are pregnant or if you have heart or blood vessel disease, high blood pressure, narrow-angle glaucoma, overactive thyroid, trouble urinating, enlarged prostate, a stomach ulcer, or bowel blockage.

  • This medicine may make you dizzy or drowsy. Do not drive or do anything that could be dangerous until you know how this medicine affects you.

  • Tell your doctor if you have asthma or are allergic to sulfites. This medicine contains sodium metabisulfite, which may cause an allergic reaction.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Ryvent interactions

  • Do not take carbinoxamine if you used an MAO inhibitor (MAOI) within the past 14 days.

  • Tell your doctor if you use anything else that makes you sleepy. Some examples are allergy medicine, narcotic pain medicine, and alcohol.

  • Tell your doctor if you have asthma or are allergic to sulfites. This medicine contains sodium metabisulfite, which may cause an allergic reaction.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Ryvent side effects

Serious Side Effects

  • Urinating more than usual, or difficulty urinating

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Dizziness or severe sleepiness

  • Seeing or hearing things that are not there, seizure

Less Serious Side Effects

  • Dry mouth, dry eyes

  • Feeling restless or excited (especially in children)

  • Nausea, vomiting, diarrhea, or heartburn, loss of appetite

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