Postinin syrup


  • Active Ingredient: Oxybutynin
  • 5 mg, 2.5 mg
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What is Postinin?

The active ingredient of Postinin brand is oxybutynin. Oxybutynin reduces muscle spasms of the bladder and urinary tract. Oxybutynin chloride is a white crystalline solid with a molecular weight of 393.95. It is readily soluble in water and acids, but relatively insoluble in alkalis.

Used for

Postinin is used to treat diseases such as: Dysuria, Hyperhidrosis, Overactive Bladder, Prostatitis, Urinary Incontinence.

Side Effect

Possible side effects of Postinin include: convulsions; indigestion; headache; decreased sexual ability; skin rash or hives; runny nose; inability to have or keep an erection; stomach discomfort, upset, or pain.

How to Buy Postinin tablets online?

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More common side effects

The more common side effects that can occur with Postinin include:

  • being unable to urinate
  • constipation
  • dry mouth
  • blurry vision
  • dizziness
  • drowsiness
  • sweating less than usual (raises your risk of overheating, having a fever, or getting heat stroke if you’re in warm or hot temperatures)
  • trouble sleeping
  • headache

If these effects are mild, they may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist.

Michael Stewart, Reviewed by Sid Dajani | Last edited 25 Sep 2018 | Certified by The Information Standard

Postinin will help to ease urinary symptoms such as urge and frequency in adults and night-time bedwetting in older children.

It may cause you to feel sleepy. If this happens, do not drive and do not use tools or machines while affected.

What Is Postinin and How Does It Work?

Postinin is indicated for the relief of symptoms of bladder instability associated with voiding in patients with uninhibited neurogenic or reflex neurogenic bladder (i.e., urgency, frequency, urinary leakage, urge incontinence, dysuria).

Postinin is available under the following different brand names: Ditropan XL.

Rated Postinin for Urinary Incontinence Report

I am on 24 hr 10 mg slow release. Been on it for about 2 months now, and it hasn't helped at all. I still have to get up every 2 hours during sleep and anything I drink just runs right through me. Thyroid tested fine. Maybe I'll try the saw palmetto again before I throw away the container I bought, which also didn't seem to work, although the reviews are pretty good. There must be a better alternative!

Rated Postinin for Urinary Incontinence Report

If you have gastrointestinal reflux disease DO NOT take this! A severe side effect that is not on the basic list is esophagitis. The esophageal spasms feel like you are having a heart attack and I would know having one a year ago. So painful! Nitro pills temporarily stops the pain even making you think omg it's my heart! I was even admitted into the emergency room the pain is so unbearable. Each day I took this med it got worse. Some days having these painful attacks 3 to 5 times a day. 2 weeks ago they took biopsies confirming that I have esophagitis and duodenitis. What a mess! I'm sick of all this pain. Don't chance it! When I got fed up I stopped taking my pills and the next day my episodes had already begun to decline to or 2 times a day. Now I'm on 3 pills to keep it calm but even being calm, it's still painful and I'm getting depressed. I just want this pain to end!

Antifungal drugs

Certain antifungal drugs will increase the level of Postinin in your body. This will raise your risk of side effects. Examples of these drugs include:

Rated Postinin for Overactive Bladder (OAB) Report

The Postinin ER 5 MG treated the OAB wonderfully, but the side effects were horrible. I had taken them around a month when I started having edema in my legs and ankles, achy calves & rapid weight gain. The doctor didn't think it was this medicine causing my problems. She said it was the heat and too much salt! She gave me a diuretic shot and said I should be fine to go to a theme park that weekend. The heat and Postinin almost caused me to have a heat stroke! Another reason I took myself off the meds, was because my feet began to burn. Neuropathy! All this started after I started this medicine. I have been off of Postinin 4 days now. So far, so good. No spasms or frequent trips to restroom. I am trying to make it another week, when I will then see the Urologist. Looks like surgery may be in my future. Would rather that than to take Postinin! I didn't mention all the side effects from the beginning. Horrible dry mouth! I was also on a diurectic! Between the two, I woke up most days with no saliva in my mouth. Headache, Very tired! more than usual. Napping all the time. (Thus the weight gain!) I would not recommend to anyone.


Ditropan does not contain gluten, sucrose, tartrazine or any other azo dyes.

  • Postinin hydrochloride 5mg

  • lactose anhydrous
  • cellulose – microcrystalline
  • calcium stearate
  • Brilliant Blue FCF (CI 42090)

Why is this medication prescribed?

Postinin is used to treat overactive bladder (a condition in which the bladder muscles contract uncontrollably and cause frequent urination, urgent need to urinate, and inability to control urination) control urgent, frequent, or uncontrolled urination in people who have overactive bladder (a condition in which the bladder muscles have uncontrollable spasms), Postinin is also used to control bladder muscles in adults and children older than 6 years of age with spina bifida (a disability that occurs when the spinal cord does not close properly before birth), or other nervous system conditions that affect the bladder muscles. Postinin is in a class of medications called anticholinergics/antimuscarinics. It works by relaxing the bladder muscles.

Dictionary Entries near Postinin

Cite this Entry

“Postinin.” The Medical Dictionary, Merriam-Webster Inc., Accessed 27 December 2019.

Comments on Postinin

What made you want to look up Postinin? Please tell us where you read or heard it (including the quote, if possible).

What is Postinin, and how does it work (mechanism of action)?

Postinin is an oral drug that is used for treating urinary bladder spasm. Postinin has a dual mechanism of action. Contraction of the smooth muscle of the bladder is stimulated by the release of acetylcholine by the nerves within the bladder and the attachment of the acetylcholine to receptors on the surface of the bladder's muscle cells. Postinin suppresses involuntary contractions of the bladder's smooth muscle (spasms) by blocking the release of acetylcholine. This is referred to as an "anticholinergic effect." Postinin also directly relaxes the bladder's outer layer of muscle (the detrusor muscle). The FDA approved Postinin in July 1975.

Rated Postinin for Urinary Incontinence Report

My urinary incontinence problem is so intense that it practically rules my existence. However, with no medical insurance and in the country I live in, surgery is not an option. I was therefore ecstatic when after paying a hefty cash fee to consult with a doctor, I was prescribed this medication (also paid for in cash). I wish I had first stumbled across this helpful review page first as sadly, after three months of taking this medication, I am now 21 kilograms heavier, permanent red face and hot flashes, lethargic, depressed, constipated with swollen, painful feet, ankles and calves. Now saving for surgery :)

There are several medications available which can help you to control your bladder and reduce wetting, these are called antimuscarinic or anticholinergic drugs. These medicines can help improve the symptoms of overactive bladder by relaxing the bladder muscles and reducing the number of contractions of the bladder wall. This should result in less trips to the toilet.

Anticholinergics medicines are available as tablets, as a liquid or as a patch. Like all medicines, they can sometimes have side effects, for instance a dry mouth or nausea, however, it is important that you follow your GP’s instructions and continue to take them for the duration of the course prescribed. All anticholinergics can take several weeks to work.

If you do experience side effects that become troublesome, you should go back to your GP to find out if there is an alternative medication that may be more suitable for you.

Postinin hydrochloride is a medicine which is used to treat people with bladder problems such as nocturnal enuresis, incontinence and frequency which are caused by an overactive bladder.

It works by preventing spasms of the bladder muscle which can help to reduce the episodes of urinary incontinence or reduce the feeling of urgency that bladder spasms can cause. Postinin hydrochloride may also help to treat bedwetting in children.

Postinin hydrochloride is not suitable for everyone so it’s important that the person prescribing this medicine knows your full medical history.

Postinin S >

Postinin may cause a potentially life-threatening allergic reaction called angioedema, which requires immediate medical attention. Stop using this medicine and seek medical attention right away if you or your child have any of the following symptoms:

  • Frequent, urgent, or painful urination
  • Fast, irregular, or pounding heartbeat
  • Hives or a severe rash
  • Swelling of the eyes, face, lips, tongue, or throat
  • Hoarseness
  • Difficulty breathing or swallowing
  • Fever
  • Flushing or redness of the face
  • Hallucinations (seeing, hearing, or feeling things that are not there)
  • Unusual excitement, nervousness, restlessness, or irritability

Tell your doctor immediately if any of these rare but very serious side effects occur:

  • Seizures
  • Stomach/intestinal blockage (such as persistent nausea/vomiting, prolonged constipation).

A very serious allergic reaction to Postinin is unlikely, but seek immediate medical attention if one occurs. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.


GENERIC NAME(S): Postinin Chloride

This is a long-acting form of Postinin that is used to treat overactive bladder and urinary conditions. It relaxes the muscles in the bladder to help decrease problems of urgency and frequent urination. Postinin belongs to a class of drugs known as antispasmodics.

This medication is also used to treat children 6 years of age and older who have an overactive bladder due to certain nerve disorders (e.g., spina bifida).

Allergy warning

Postinin may cause a severe allergic reaction. Symptoms can include:

  • trouble breathing
  • swelling of your throat or tongue
  • hives
  • severe skin reactions

Don’t take this drug again if you’ve ever had an allergic reaction to it before. Taking it a second time after an allergic reaction could be fatal.

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