Ethchlorvynol (Oral)

Ethchlorvynol is used to help patients with insomnia to get to sleep.


Ethchlorvynol is a sleeping aid that is used in some cases for the treatment of insomnia. It is used to help the patient get to sleep, but is for occasional use rather than regular use. If it is used daily then it is not normally effective for more than a period of one week.

This medication is a prescribed medication and is available in the form of a liquid filled capsule. It is sold under the brand Placidyl.

Condition treated

  • Insomnia

Type Of Medicine

  • Sedative
  • Hypnotic

Side Effects

In addition to helping the patient to sleep, the use of Ethchlorvynol may also have unwanted side effects on the patient. While not all side effects will occur, in some cases the patient may need to seek medical attention when they do.

You should check with your doctor immediately if any of the following side effects occur:

  • Darkening of the urine
  • Dizziness
  • Faintness
  • Hives
  • Paling of the stools
  • Skin rash
  • Unusual bleeding
  • Unusual excitement
  • Unusual nervousness
  • Unusual or unexplained bruising
  • Unusual restlessness
  • Yellowing of the eyes
  • Yellowing of the skin

Other side effects can also occur that would not normally require you to seek medical attention. These side effects will usually abate after a short period of time and do not usually suggest the presence of other underlying medical complications. If side effects do become bothersome or are ongoing, however, you can contact your doctor for advice. The following side effects would not normally necessitate contacting your doctor:

  • Blurring of vision
  • Clumsiness
  • Confusion or disorientation
  • Daytime drowsiness
  • Dizziness or light-headedness
  • Indigestion
  • Lowering of blood pressure
  • Nausea
  • Numbness of the face
  • Stomach pains
  • Unpleasant aftertaste
  • Unsteadiness
  • Unusual tiredness
  • Unusual weakness
  • Vomiting

It is also possible to overdose in using this medication. If you believe that you or anyone else has overdosed on this treatment then you should contact the emergency services immediately. The following symptoms of overdose may be noticed:

  • Chills
  • Clumsiness
  • Continued confusion
  • Decrease in quality of or other change in vision
  • Double vision
  • Feverishness
  • Lowered body temperature
  • Numbness, pain or weakness of the hands and/or feet
  • Overactive reflexes to contact
  • Paleness of the skin
  • Problems with the control or coordination of muscles
  • Shakiness and/or unsteadiness when walking
  • Shortness of breath
  • Slow or troubled breathing
  • Slowed heartbeat
  • Slurring of speech
  • Soreness of the throat
  • Trembling
  • Trembling
  • Unsteadiness
  • Unusual bleeding
  • Unusual bruising
  • Unusual movements of the eyes
  • Unusual tiredness
  • Unusual weakness

Other side effects that have not been listed herein can also occur from the use of Ethchlorvynol. If you experience other side effects then you should consult your doctor for advice.


Ethchlorvynol should be taken after eating or with a glass of milk. Doing so will reduce the chance of dizziness, unsteadiness, and clumsiness occurring immediately after use.

This medication should be taken only as you have been directed to by your doctor. Taking this medication for longer than ordered, too frequently or for too long may make this medication habit-forming and addiction can occur. With increased dosing will also come a greater risk of side effects and a greater severity of side effects.

The amount of medication that you are prescribed will depend on the strength of the medication, your personal circumstances and other factors. You should only take the treatment as directed by your doctor and the following should only be used as a guideline:

When taking the oral dosage as Placidyl capsules:

  • Adults should take 500-1000mg before bed.
  • Children should only use this medication as determined by a prescribing doctor.


Ethchlorvynol should not be taken with certain medications. In some cases, medications should not be used in conjunction with one another at all and in other cases, they may prevent each other from working or may increase the risk of certain side effects occurring. It is vital that you inform your doctor of all medications that you are taking before receiving a prescription for this medication. This is especially important if you are taking any of the following:

You should not use Ethchlorvynol in conjunction with the following medication. Your doctor may look for an alternative treatment:

  • Sodium Oxybate

The use of Ethchlorvynol in conjunction with any of the following is not normally recommended. When this is the best treatment for you, however, your doctor may prescribe both with adjusted doses or adjusted frequency of use:

  • Zolpidem
  • Triazolam
  • Tranylcypromine
  • Tramadol
  • Toloxatone
  • Thiopental
  • Temazepam
  • Tapentadol
  • Sufentanil
  • Selegiline
  • Secobarbital
  • Remifentanil
  • Rasagiline
  • Quazepam
  • Propoxyphene
  • Procarbazine
  • Primidone
  • Prazepam
  • Phenobarbital
  • Phenelzine
  • Periciazine
  • Pentobarbital
  • Pentazocine
  • Pargyline
  • Oxymorphone
  • Oxycodone
  • Oxazepam
  • Nitrazepam
  • Nialamide
  • Morphine Sulfate Liposome
  • Morphine
  • Moclobemide
  • Midazolam
  • Methohexital
  • Methocarbamol
  • Methadone
  • Metaxalone
  • Meprobamate
  • Mephobarbital
  • Mephenesin
  • Meperidine
  • Medazepam
  • Meclizine
  • Lormetazepam
  • Lorazepam
  • Linezolid
  • Levorphanol
  • Lazabemide
  • Ketazolam
  • Isocarboxazid
  • Iproniazid
  • Hydromorphone
  • Hydrocodone
  • Halazepam
  • Furazolidone
  • Flurazepam
  • Flunitrazepam
  • Flibanserin
  • Fentanyl
  • Estazolam
  • Doxylamine
  • Dihydrocodeine
  • Diazepam
  • Dantrolene
  • Codeine
  • Clorgyline
  • Clorazepate
  • Clonazepam
  • Clobazam
  • Chlorzoxazone
  • Chlordiazepoxide
  • Carisoprodol
  • Carbinoxamine
  • Butorphanol
  • Butalbital
  • Butabarbital
  • Buprenorphine
  • Bromopride
  • Bromazepam
  • Brofaromine
  • Aprobarbital
  • Anileridine
  • Amobarbital
  • Alprazolam
  • Alfentanil

Other interactions with medications may also occur. You should ensure that your doctor is aware of all treatments that you are taking before beginning use of this medication.

Other medical problems from which you suffer can also be affected by the use of medications not intended for this purpose. In some cases, conditions may be worsened and in others, the side effects may be intensified. You should inform your doctor of all medical conditions you have and also of any medical conditions from which you have recovered in the past. This is especially important in the following cases

Dependency on Ethchlorvynol is likely to develop in patients with:

  • A history of alcohol abuse
  • A history of drug abuse

Slower removal of Ethchlorvynol and greater effects and side effects may occur in patients with the following conditions:

The following conditions may be worsened by the use of Ethchlorvynol:

Other medical conditions may also be impacted by the use of this treatment. You should inform your doctor of your full medical history before beginning use.


Before deciding to begin using this or any other medication you should weigh the benefits of doing so against the potential risks that it may expose you too. Before taking this medication you should consider all of the following with your doctor:

Allergie' If you have ever reacted badly to a medication in the past then you may not be able to use this treatment. Be sure to inform your doctor of all allergies that you have before receiving your prescription.

Pediatric'This medication has only been tested in adults and should not be used in children. Other medications are available for the treatment of sleeping conditions in children.

Geriatric' Ethchlorvynol may have a greater effect on the elderly population and the chance of side effects occurring is higher. Elderly people are also more likely to have conditions that may prohibit or limit the use of this treatment such as kidney disease or liver disease.

Pregnancy 'There is a clear risk to the use of this treatment during pregnancy. You should inform your doctor if you are pregnant or if there is a chance of you becoming pregnant during use.

Breastfeeding 'There is no adequate information regarding breastfeeding when using this medication. You should discuss this with your doctor and weigh the benefits of breastfeeding against the potential risks of treatment.

In cases where this medication is being taken for a long period of time, the following steps should be taken:

  • You should be checked regularly by your doctor to ensure that you are well and not unwanted side effects are occurring.
  • You should not stop use without talking to your doctor. Dependency may develop over time and you may need to reduce your dose slowly instead of stopping abruptly.

This medication can intensify the effects of other substances that depress the central nervous system. This includes alcohol, sedatives, antihistamines, barbiturates, narcotics, anesthetics, seizure medications and pain relievers. You should not take any of these without discussing this with your doctor first and should avoid alcohol as much as possible.

If an overdose of this medication is taken then you should contact the emergency services immediately. After overdose, a patient may quickly lose consciousness and then be beyond help. Some signs of overdose include loss of motor control and loss of the ability to communicate clearly.

Patients may become dizzy, drowsy and inattentive during treatment. This can make you unsafe to drive and operate machinery of any kind. You should ensure that you are completely safe to operate any such tools or equipment before doing so. Remember that this is your legal responsibility and do not do anything that puts you or others in danger when you are anything other than fully alert.


Ethchlorvynol should be stored at room temperature. It should be kept out of direct light, away from moisture and away from heat.

Ethchlorvynol should be prevented from freezing.

Always keep this medication out of the reach of children and dispose of unwanted or outdated medication appropriately.


Ethchlorvynol is a sedative and hypnotic medication that is used in the treatment of patients with insomnia. Insomnia is an inability to sleep and this can dramatically affect the life of patients suffering from it. Ethchlorvynol allows patients to rest properly and enjoy the natural recovery that their body needs.

Ethchlorvynol cannot be used on a daily basis. It is effective only when used occasionally and when used regularly it is not effective for use for more than one week. In most cases, this treatment is no longer used in preference of other available medications, but certain patients may use this if they respond badly to other treatments.

The effects of Ethchlorvynol can be intensified in the elderly and the treatment has not been tested for use in children. Ethchlorvynol is only available with a prescription and is taken in the form of a liquid filled capsule before bed.

Ethchlorvynol is a habit-forming medication that can lead to dependency if misused. It is therefore not suitable for patients with a history of drug or alcohol abuse. When ceasing use after a long period patients may also need to reduce their dose gradually over time to prevent withdrawal symptoms from occurring.

This medication can have serious side effects on the patient which will be intensified if the dose given is too great. Patients should ensure that they understand the risks of use before beginning treatment and should discuss their full medical history and present treatments with their doctor.

Ethchlorvynol interacts with a wide range of different medications so patients should not take any other treatments in conjunction with it unless approved by the doctor.

Patients should limit their intake of alcohol during use and if this is a concern they should discuss this with their doctor before use.