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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Glycerinum
Generic Name
Glycerinum
Active Ingredient
GlycerinCategory
Non-Standardized Chemical Allergen [EPC]
Variants
7
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 100 [hp_C]/1 | PELLET | ORAL | 37662-0781 |
| 30 [hp_C]/1 | PELLET | ORAL | 37662-0780 |
| 200 [hp_C]/1 | PELLET | ORAL | 37662-0782 |
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Glycerinum, you must consult a qualified healthcare professional.
| 500 [hp_C]/1 | PELLET | ORAL | 37662-0783 |
| 1 [hp_M]/1 | PELLET | ORAL | 37662-0784 |
| 6 [hp_C]/1 | PELLET | ORAL | 37662-0778 |
| 12 [hp_C]/1 | PELLET | ORAL | 37662-0779 |
Detailed information about Glycerinum
Glycerin is a hyperosmotic agent and emollient used primarily for the relief of occasional constipation and as a topical skin protectant. It belongs to the osmotic laxative class and works by drawing water into the colon to facilitate bowel movements.
No specific dose adjustments are required for rectal use. For systemic (oral) use, caution is advised in patients with severe renal disease due to potential fluid shifts.
No dosage adjustments are typically necessary for topical or rectal administration.
Elderly patients should use laxatives with caution to avoid dehydration or electrolyte imbalances. Healthcare providers often recommend starting with the lowest effective dose.
Glycerin is typically used on an "as-needed" basis. If your healthcare provider has prescribed a regular schedule and you miss a dose, take it as soon as you remember. If it is almost time for the next dose, skip the missed dose. Do not double the dose.
Signs of rectal overdose may include severe rectal pain, persistent diarrhea, or dehydration. If oral glycerin is ingested accidentally in large amounts, symptoms may include headache, nausea, vomiting, or confusion. Seek emergency medical attention or contact a Poison Control Center immediately.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance.
When used rectally, common side effects are usually localized and temporary. These may include:
Glycerin should only be used for short-term relief. If symptoms of constipation persist for more than seven days, consult a healthcare professional. It is important to maintain adequate fluid intake while using any osmotic laxative to prevent dehydration.
No FDA black box warnings for Glycerin.
There are no medications that are strictly contraindicated for use with rectal or topical Glycerin. However, Glycerin should not be used simultaneously with other rectal products unless directed by a physician, as this may interfere with absorption or cause excessive irritation.
FDA Pregnancy Category: C (Rectal/Topical). Glycerin is generally considered safe for occasional use during pregnancy when administered rectally or topically, as systemic absorption is minimal. However, it should only be used if clearly needed and under the advice of a healthcare provider. There is no evidence of teratogenicity (birth defects) associated with standard use.
Glycerin is not expected to pass into breast milk in significant quantities following rectal or topical application. It is generally considered compatible with breastfeeding. Always consult a healthcare provider before use while nursing.
Glycerin suppositories are frequently used in children as young as 2 years old for occasional constipation. For children under 2, a healthcare provider must be consulted. It is important to use the specific "pediatric" or "infant" sized suppositories to ensure the correct dose.
Glycerin acts as a Hyperosmotic Agent. In the rectum, it exerts an osmotic effect that draws water into the lumen. This increases the osmotic pressure and volume of the stool, which mechanically stimulates the rectal stretch receptors and initiates the defecation reflex. Topically, it acts as a humectant by forming hydrogen bonds with water molecules, drawing them into the skin's layers.
The onset of action for rectal Glycerin is rapid, typically occurring within 15 to 60 minutes. It does not have a significant systemic dose-response relationship when used rectally because its action is local. Tolerance is generally not a concern with occasional use, but the body may become dependent on the stimulus for bowel movements with chronic use.
| Parameter | Value |
|---|---|
| Bioavailability | High (Oral); Minimal (Rectal/Topical) |
Common questions about Glycerinum
Glycerin is primarily used as a hyperosmotic laxative to provide short-term relief from occasional constipation. It is also a very common ingredient in topical skin care products where it acts as an emollient and humectant to hydrate dry or itchy skin. In some clinical settings, it may be used to reduce pressure in the eye or brain, though this is less common today. Because it draws water into the stool or skin, it is highly effective for localized hydration and lubrication. Always use glycerin as directed on the product label or by your healthcare provider.
The most common side effects of Glycerin, particularly when used as a rectal suppository, include mild rectal irritation, burning, or a stinging sensation. Some users may also experience abdominal cramping or a frequent urge to go to the bathroom immediately after use. When used topically on the skin, it is generally well-tolerated, though some people with very sensitive skin might notice mild redness or itching. These effects are usually temporary and resolve once the medication has worked or is washed off. If you experience severe pain or bleeding, you should contact a doctor immediately.
There is no known direct interaction between alcohol and glycerin when it is used rectally or topically. However, alcohol is a known diuretic and can lead to systemic dehydration, which is a leading cause of constipation. If you are using glycerin to treat constipation, drinking alcohol may counteract the benefits of the treatment by further drying out your stool. It is generally recommended to stay well-hydrated with water while treating constipation. If you have concerns about alcohol use and your medications, discuss them with your healthcare provider.
Glycerin suppositories and topical creams are generally considered safe for use during pregnancy because very little of the drug is absorbed into the bloodstream. According to clinical standards, it is often recommended for pregnant women who experience occasional constipation, which is a common symptom during gestation. However, because every pregnancy is different, it is vital to consult your obstetrician or healthcare provider before starting any new medication. They can help determine if glycerin is the best choice for your specific needs. Generally, it is preferred over stimulant laxatives during pregnancy.
When used rectally as a suppository or enema, Glycerin typically produces a bowel movement within 15 to 60 minutes. It is one of the faster-acting options for constipation relief compared to oral laxatives, which can take 12 to 72 hours to work. Because of this rapid onset, it is important to be near a restroom after administration. If you do not have a bowel movement within an hour, it does not necessarily mean you should use another dose immediately. If the product fails to work after one use, contact your healthcare provider for further advice.
Yes, you can stop taking Glycerin suddenly, as it is intended for short-term, as-needed use rather than a daily maintenance schedule. There is no physical withdrawal syndrome associated with stopping glycerin. However, if you have been using it daily for a long period, your bowels may have become dependent on it, and you might experience a return of constipation. It is best to use glycerin only when necessary and focus on dietary fiber and hydration for long-term regularity. If you find you cannot have a bowel movement without it, consult your doctor.
Since Glycerin is typically used only when needed for constipation or dry skin, missing a dose is usually not a concern. If your doctor has prescribed it on a specific schedule and you miss a dose, apply or insert it as soon as you remember. If it is almost time for your next scheduled dose, skip the one you missed and continue with your regular timing. Never use two doses at once to make up for a missed one. If you are unsure what to do, a quick call to your pharmacist or doctor can provide clarity.
There is no evidence that Glycerin causes weight gain when used rectally or topically as directed. While glycerin is a type of carbohydrate and contains calories if ingested orally, the amounts used in medical applications are generally too small to impact body weight. Furthermore, rectal suppositories act locally and are not absorbed in quantities that would affect systemic metabolism or caloric intake. If you notice unexpected weight gain while using any medication, it is likely due to other factors. You should discuss any significant weight changes with your healthcare provider.
Glycerin used rectally or topically has a very low risk of interacting with oral medications because it stays mostly in the local area of application. However, you should avoid using other rectal products at the same time as a glycerin suppository to ensure it works correctly. If you are taking oral diuretics or have heart or kidney disease, check with your doctor before using large amounts of glycerin. Always provide your healthcare provider with a full list of all supplements, herbal products, and medications you are currently taking. This ensures that your treatment plan is safe and effective.
Yes, Glycerin is widely available as a generic medication and is often the active ingredient in many store-brand constipation and skin care products. Generic glycerin is bioequivalent to brand-name versions, meaning it has the same strength, safety, and efficacy. You can find it in most pharmacies and grocery stores without a prescription. Choosing a generic version is typically more cost-effective while providing the same clinical benefits. If you are unsure which product to choose, your pharmacist can help you find a generic glycerin option that meets your needs.
Other drugs with the same active ingredient (Glycerin)
> Warning: Stop using Glycerin and call your doctor immediately if you experience any of these:
Prolonged use of Glycerin suppositories may lead to "laxative dependence," where the bowels require a stimulant to function normally. It may also cause chronic proctitis (inflammation of the rectal lining) in rare cases of extreme overuse.
No FDA black box warnings have been issued for Glycerin. It is generally considered a low-risk medication when used according to label instructions.
Report any unusual symptoms to your healthcare provider.
Routine lab monitoring is generally not required for topical or rectal glycerin. However, in patients using systemic glycerin for pressure reduction, healthcare providers may monitor:
Glycerin is not known to impair the ability to drive or operate machinery when used rectally or topically.
There are no known direct interactions between alcohol and rectal/topical glycerin. However, alcohol can contribute to dehydration, which may worsen constipation.
There is no requirement for tapering when discontinuing glycerin. However, if you have been using it daily for an extended period, you should discuss a plan with your doctor to restore natural bowel habits.
> Important: Discuss all your medical conditions with your healthcare provider before starting Glycerin.
There are no known significant food interactions with Glycerin. For patients treating constipation, a high-fiber diet and increased water intake are recommended to complement the medication's effects.
For each major interaction, the primary mechanism is often pharmacodynamic (additive effects on the bowel or fluid balance). The clinical consequence is usually an increased risk of side effects like diarrhea or dehydration. Management involves using the lowest effective dose and monitoring clinical response.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking.
There is no significant evidence of cross-sensitivity between Glycerin and other classes of laxatives or emollients. However, patients sensitive to other polyols (like sorbitol) should monitor for similar local irritation.
> Important: Your healthcare provider will evaluate your complete medical history before prescribing Glycerin.
Older adults may be more sensitive to the effects of laxatives. There is an increased risk of electrolyte imbalance if used excessively. Clinical guidelines suggest that lifestyle modifications (fiber, fluid, exercise) should be the first line of treatment in the elderly, with glycerin used as a secondary, short-term option.
No dose adjustment is needed for rectal use. Patients with chronic kidney disease (CKD) should avoid frequent use of any laxative without medical supervision to prevent fluid-electrolyte disturbances.
No specific adjustments are required for patients with liver disease for the standard rectal or topical routes of administration.
> Important: Special populations require individualized medical assessment.
| Half-life | 30–45 minutes |
| Tmax | 1–1.5 hours (Oral) |
| Metabolism | Hepatic (to glucose/glycogen) |
| Excretion | Renal (7-14% unchanged) |
Glycerin belongs to the Osmotic Laxative and Emollient therapeutic classes. Related medications in the osmotic laxative class include Sorbitol, Polyethylene Glycol (Miralax), and Lactulose.