Shipping Update

We are now seeing improvements in our shipping times. However, things are not yet back to normal and there are still some delays occurring. We will provide updates as the situation changes.

Our normal shipping time averages 1 - 2 weeks. Due to the pandemic, shipments may sometimes take an additional 2 – 4 weeks to arrive, depending on the source country of your order. Shipments from the United Kingdom and Canada are generally quicker than from other countries.

Please note that these times are averages and individual shipping times will vary. We highly recommend that you place your order at least 2 – 4 weeks or more ahead of your normal reorder time to avoid running out of your medication.

We offer a shipping guarantee when you place an order with us. If your order does not arrive within 6 weeks from the date it was shipped, we will re-ship your order to you at no additional cost.

Call Center

Our call center hours of operation are 6:00 am – 9:00 pm Central Time on Monday to Friday, and 7:00 am – 7:00 pm Central Time on Saturday and Sunday.

If you are experiencing increased hold times or are calling outside of these hours, please leave us a message or send us an email and we will get back to you as soon as we can. Due to increased demand on telephone networks worldwide, you may experience some intermittent connection problems. If this happens our agents will call you back.

Our Commitment

If you have any questions about any changes in our service please do not hesitate to contact us. Our staff are working tirelessly to ensure the timely fulfillment and delivery of all orders. The health and safety of our customers and staff is our highest priority and we remain committed to providing service at the highest level.

We appreciate your business and thank you for your continued support.

Management and Staff
Pharmacy Rx World
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Celontin (Methsuximide) and/or alternatives

Brand Name Options
  1. Buy Celontin

    Celontin 300mg

    Manufactured by: ERFA Canada Inc.

    Product of Canada. Shipped from Canada

    RxPrescription Required
    Currently Unavailable.
Generic OptionsWhat is a Generic?

No Generic Alternative.

Please note that the country, manufacturer, and/or shipping country may vary depending on availability. All trademarks and registered trademarks are the property of their respective owners.

General Information On Celontin

Celontin (generic name: Methsuximide) is used by itself or along with other medications to control and prevent petit mal or absence type of seizures. Methsuximide belongs to the category of anticonvulsants, which work by gaining control over abnormal electrical activities in the patient’s brain during seizures. This medicine is available in the form of an oral capsule, which is to be taken as prescribed by your doctor.

Side Effects for Celontin

Dizziness, drowsiness, loss of appetite, stomach or abdominal pain, vomiting, nausea, diarrhea, weight loss, headache, and lack of coordination are some common side effects of the drug. Some patients taking Celontin may also complain of suicidal thoughts, depression, and mental or mood changes. Contact your doctor immediately if you notice sudden changes in your moods and thoughts and witness behavioral changes like signs of depression. You also need to watch out for swelling or pain in the joints, rashes on the cheeks and nose, easy bleeding and bruising, rapid breathing, severe tiredness, and flu-like symptoms such as persistent sore throat and fever. An allergic reaction to Celontin can be identified by itching or swelling of the face, throat, tongue, or lips, breathing trouble, severe dizziness, rashes, or hives.


Before your doctor recommends you to buy Celontin, you should inform him/her if you have an allergy to methsuximide, ethosuximide, or any active or inactive ingredients in the medicine. You should also consult your doctor if you have a severe kidney or liver problems. As Celontin makes you drowsy or dizzy, you should not drive a vehicle, use a machine, or do any such activity that calls for complete alertness. Alcoholic beverages may worsen the side effects of the drug, and so, you should limit your alcohol intake; if possible, avoid alcohol altogether as long as you are on Celontin treatment. If you are pregnant or breastfeeding, you should use Celontin only if it is clearly needed, because its safety during these instances has not been clearly indicated.

Celontin Dosage

During the first week, you will be given Celontin 300mg per day, which can be increased after one week to Celontin 300mg for 3 weeks. The daily dose should not exceed Celontin 1.2g. Smaller children are prescribed one Celontin 150mg capsule per day. The drug can be recommended to you along with other anticonvulsant medicines in order treat your condition efficiently.


As the drug causes dizziness, you should inform your doctor if you are taking other similar drugs including antihistamines, sleeping pills, anti-anxiety medications, muscle relaxants, narcotic pain relievers, and antidepressants. These may include alprazolam, zolpidem, diazepam, cetirizine, codeine or diphenhydramine. Some medicines for cold and cough and allergies may also contain drugs that may cause drowsiness. Apart from these, you should inform your doctor about all the medicinal products you are taking at present, including prescription drugs, over-the-counter medicines, herbal products, health supplements, and topical applications. Depending on your condition and the other drugs you take, your doctor will be able to decide whether Celontin is the right drug for you or not.

IMPORTANT DISCLAIMER: All medical content is supplied by a third party company who is independent from this web site. As such, this web site can not guarantee the reliability, accuracy, and /or medical efficacy of the information provided. In all circumstances, you should seek the advice of a health professional pertaining to drug, treatment and/or medical condition advice. Note that not all products are shipped by our contracted Canadian pharmacy. This website contracts with dispensaries around the world that ship products directly to our customers. Some of the jurisdiction include but are not limited to United Kingdom, Europe, Turkey, India, Canada, Vanuatu, Mauritius, and USA. The items within your order may be shipped from any one of these jurisdiction depending on the availability and cost of the products at the time you place your order. The products are sourced from these countries as well as others. Please note that the product appearance may vary from actual product received depending on availability.