Drugs Home > Carbinoxamine Extended-Release Oral Suspension

Carbinoxamine extended-release oral suspension is a medicine that can be prescribed to treat seasonal allergies, eye and skin allergies, and a wide variety of other allergic conditions. It comes in the form of an oral liquid that is generally taken twice daily. Though this product is generally well tolerated, potential side effects include sleepiness, dizziness, and coordination problems.


What Is Carbinoxamine Extended-Release Oral Suspension?

Carbinoxamine extended-release oral suspension (Karbinal™ ER) is a prescription medication approved to treat the symptoms of a wide variety of allergic conditions, including seasonal allergies, allergic conjunctivitis (eye allergies), and skin allergies. It is also used in combination with other medicines to treat a severe allergic reaction known as an anaphylactic reaction.
This medicine contains carbinoxamine in an extended-release (ER) form, which means the drug is released slowly into the body. This allows the medicine to be dosed just twice a day. Carbinoxamine is also the active ingredient in a regular-release medication (Palgic®), which is taken three to four times a day. 
(Click What Is Carbinoxamine Extended-Release Oral Suspension Used For? for more information, including possible off-label uses.)

Are There Side Effects?

As with any medicine, carbinoxamine extended-release oral suspension can cause side effects. However, not everyone who takes the drug will experience problems. Most people tolerate it quite well.
If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider. Serious side effects are less common.
Some of the most common carbinoxamine extended-release oral suspension side effects include but are not limited to:
  • Sedation (a calming effect)
  • Sleepiness
  • Dizziness
  • Problems with coordination.
(Click Carbinoxamine Extended-Release Oral Suspension Side Effects to learn more, including potentially serious side effects you should report immediately to your healthcare provider.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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