Skip to Content

Vontrol Side Effects

Generic Name: diphenidol

Note: This page contains side effects data for the generic drug diphenidol. It is possible that some of the dosage forms included below may not apply to the brand name Vontrol.

Applies to diphenidol: oral tablet

As well as its needed effects, diphenidol (the active ingredient contained in Vontrol) may cause unwanted side effects that require medical attention.

Severity: Moderate

If any of the following side effects occur while taking diphenidol, check with your doctor or nurse as soon as possible:

  • Confusion
  • hallucinations (seeing, hearing, or feeling things that are not there)
Symptoms of overdose:
  • Drowsiness (severe)
  • shortness of breath or trouble with breathing
  • unusual tiredness or weakness (severe)

Minor Side Effects

Some diphenidol side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common:
  • Drowsiness
Less common:
  • Blurred vision
  • dizziness
  • dry mouth
  • headache
  • heartburn
  • nervousness, restlessness, or trouble with sleeping
  • skin rash
  • stomach upset or pain
  • unusual tiredness or weakness

It is possible that some side effects of Vontrol may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.