Skip to Content

Placidyl Side Effects

Generic Name: ethchlorvynol

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

Applies to ethchlorvynol: oral capsule liquid filled

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

Severity: Moderate

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

Less common:
  • Skin rash or hives
  • dizziness or faintness
  • unusual excitement, nervousness, or restlessness
  • Darkening of urine, itching, pale stools, yellow eyes or skin
  • unusual bleeding or bruising
Symptoms of overdose:
  • confusion (continuing)
  • decrease in or other change in vision
  • double vision
  • fever, chills, or sore throat
  • low body temperature
  • numbness, tingling, pain, or weakness in hands or feet
  • overactive reflexes
  • pale skin
  • shakiness and unsteady walk, clumsiness, unsteadiness, trembling, or other problems with muscle control or coordination
  • shortness of breath or slow or troubled breathing
  • slow heartbeat
  • slurred speech
  • trembling
  • unusual bleeding or bruising
  • unusual movements of the eyes
  • unusual tiredness or weakness (severe)

Minor Side Effects

Some ethchlorvynol 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:
  • Blurred vision
  • dizziness or light-headedness
  • low blood pressure
  • indigestion
  • nausea or vomiting
  • numbness of face
  • stomach pain
  • unpleasant aftertaste
  • unusual tiredness or weakness
Less common:
  • Clumsiness or unsteadiness
  • confusion
  • drowsiness (daytime)

Side Effects: Post Treatment

After you stop taking this drug, it is possible that you may still experience side effects that need medical attention. If you notice any of the following side effects check with your doctor immediately:

  • Confusion as to time, place, or person
  • convulsions (seizures)
  • dizziness
  • hallucinations (seeing, hearing, or feeling things that are not there)
  • loss of appetite
  • memory loss
  • muscle twitching
  • nausea or vomiting
  • restlessness, nervousness, or irritability
  • slurred speech
  • sweating
  • trembling
  • trouble in sleeping
  • weakness
  • weight loss, unexplained

It is possible that some side effects of Placidyl 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.