Levall Side Effects
Generic name: carbetapentane / guaifenesin / phenylephrine
Medically reviewed by Drugs.com. Last updated on Apr 7, 2025.
Note: This document provides detailed information about Levall Side Effects associated with carbetapentane / guaifenesin / phenylephrine. Some dosage forms listed on this page may not apply specifically to the brand name Levall.
Applies to carbetapentane/guaifenesin/phenylephrine: oral liquid, oral syrup, oral tablet, oral tablet extended release.
Important warnings
This medicine can cause some serious health issues
Do not give this medication to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children.
Do not use a cough or cold medicine if you have taken an MAO inhibitor in the past 14 days.
A dangerous drug interaction could occur.
MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.
Get emergency medical help if you have any of these signs of an allergic reaction while taking carbetapentane/guaifenesin/phenylephrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
-
fast or pounding heartbeats;
-
confusion, hallucinations, unusual thoughts or behavior;
-
severe dizziness, anxiety, restless feeling, or nervousness;
-
little or no urinating;
-
easy bruising or bleeding, unusual weakness, fever, chills, body aches, flu symptoms; or
-
dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, chest pain, shortness of breath, uneven heartbeats, seizure).
Common side effects may include:
-
dizziness, drowsiness, headache, weakness;
-
dry mouth, nose, or throat, increased sweating or urination;
-
nausea, mild stomach pain;
-
sleep problems (insomnia); or
-
feeling restless or excited (especially in children).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.
See also:
Promethazine VC with Codeine
Promethazine VC with Codeine is used for cough and nasal congestion
Mucinex D
Mucinex D (guaifenesin and pseudoephedrine) is used to treat nasal and sinus congestion, and to ...
Botox
Botox is used cosmetically to reduce facial lines and wrinkles and for medical purposes for ...
Robitussin Nighttime Cough DM
Robitussin Nighttime Cough DM is used for cough, cough and nasal congestion
Brompheniramine/dextromethorphan/pseudoephedrine
Brompheniramine/dextromethorphan/pseudoephedrine is used for cough and nasal congestion
For healthcare professionals
Applies to carbetapentane/guaifenesin/phenylephrine: oral liquid, oral syrup, oral tablet, oral tablet extended release.
General adverse events
General side effects have included weakness and pallor.[Ref]
Cardiovascular
Cardiovascular side effects have included arrhythmias and hypotension with cardiovascular collapse.[Ref]
Gastrointestinal
Gastrointestinal side effects have included nausea and vomiting.[Ref]
Psychiatric
Psychiatric side effects have included fear, anxiety, and hallucinations.[Ref]
Respiratory
Respiratory side effects have included respiratory difficulty.[Ref]
Genitourinary
Genitourinary side effects have included dysuria.[Ref]
Nervous system
Nervous system side effects have included nervousness, lightheadedness, excitability, restlessness, dizziness, tenseness, convulsions, CNS depression, and insomnia.[Ref]
References
1. (2004) "Product Information. Phencarb GG (carbetapentane / guaifenesin / phenylephrine)." Boca Pharmacal Inc
More about Levall (carbetapentane / guaifenesin / phenylephrine)
- Check interactions
- Compare alternatives
- Dosage information
- During pregnancy
- Drug class: upper respiratory combinations
Related treatment guides
Further information
Levall side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.