ADD CONDITION

items per page

Onelax

Last content change checked dailysee data sync status

Active ingredient
Magnesium Citrate 1.745 g/29.6 mL
Other brand names
Drug classes
Calculi Dissolution Agent, Osmotic Laxative
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2023
Label revision date
October 27, 2025
Active ingredient
Magnesium Citrate 1.745 g/29.6 mL
Other brand names
Drug classes
Calculi Dissolution Agent, Osmotic Laxative
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2023
Label revision date
October 27, 2025
Manufacturer
AKRON PHARMA INC
Registration number
M007
NDC root
71399-0051

If you are a healthcare professional or from the pharmaceutical industry please visit this version.

If you are a consumer or patient please visit this version.

Drug Overview

Magnesium citrate is a medication commonly used to relieve occasional constipation, which is when you experience irregular bowel movements. It works by drawing water into the intestines, which helps to stimulate a bowel movement typically within 30 minutes to 6 hours after taking it.

If you're looking for a gentle way to address occasional constipation, magnesium citrate may be a helpful option to consider. Always consult with a healthcare professional if you have any questions or concerns about using this medication.

Uses

If you're dealing with occasional constipation (irregularity), this medication can help relieve your discomfort. It works by stimulating your bowels, typically leading to a bowel movement within 30 minutes to 6 hours after taking it. This can provide you with quick relief when you need it most.

Dosage and Administration

When taking this medication, make sure to drink a full glass (8 ounces) of liquid with each dose to help it work effectively. You can take it either as a single dose once a day or split it into smaller doses throughout the day, depending on what your healthcare provider recommends.

For adults and children aged 12 and older, the typical dosage is between half a bottle and a full bottle (10 fluid ounces). If the patient is a child aged 6 to 11 years, the recommended amount is between one-third and half a bottle. For children under 6 years old, it’s important to consult a doctor before giving this medication to ensure it’s safe and appropriate.

What to Avoid

It's important to use laxative products safely to avoid potential health issues. You should not use these products for longer than one week unless your doctor specifically advises you to do so. Additionally, make sure you do not exceed the maximum recommended daily dosage within a 24-hour period, as taking more than the recommended amount can lead to serious side effects and complications. Always prioritize your health and consult with a healthcare professional if you have any questions or concerns.

Side Effects

You should be aware of some important side effects and warnings associated with this medication. If you experience rectal bleeding or do not have a bowel movement after using it, stop taking the medication and consult a doctor, as these could indicate a serious condition. It's also advisable to speak with a healthcare professional before using this product if you have kidney disease, are on a magnesium or sodium-restricted diet, have stomach pain, nausea, vomiting, or have noticed a sudden change in your bowel habits lasting more than a week.

Additionally, avoid using laxative products for more than one week unless directed by a doctor, and do not exceed the maximum recommended dosage within a 24-hour period. If you are pregnant or breastfeeding, consult a healthcare provider before use. In the event of an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222.

Warnings and Precautions

It's important to use laxative products carefully. You should not use them for more than one week unless your doctor advises you to do so. Before using a laxative, consult your doctor if you have kidney disease, are on a magnesium or sodium-restricted diet, have stomach pain, nausea, or vomiting, or if you've noticed a sudden change in your bowel habits lasting more than a week. Additionally, if you are currently taking any prescription medications, check with your doctor or pharmacist before use.

While using this product, make sure not to exceed the recommended daily dosage. If you experience rectal bleeding or do not have a bowel movement after using the laxative, stop using it and contact your doctor, as these could indicate a serious issue. In the event of an overdose, seek medical help immediately or call the Poison Control Center at 1-800-222-1222.

Overdose

If you suspect an overdose, it’s crucial to seek medical help immediately. You can contact a Poison Control Center at 1-800-222-1222 for guidance. Signs of an overdose can vary, but they may include unusual drowsiness, confusion, or difficulty breathing.

Don’t wait for symptoms to worsen; getting prompt assistance can be vital. Always prioritize your safety and the safety of others by acting quickly in these situations.

Pregnancy Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using this medication. They can provide guidance on whether it’s safe for you and your baby. Always prioritize your health and the health of your child by seeking expert advice.

Lactation Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using any medication. This ensures that you understand any potential risks and can make informed decisions about your health and the health of your baby. Always prioritize open communication with your doctor regarding your breastfeeding journey and any medications you may consider.

Pediatric Use

When it comes to using this medication for children, it's important to follow the recommended dosages based on their age. For children aged 12 years and older, you can give them between half a bottle to a full bottle (10 fl oz). For those aged 6 to 11 years, the dosage should be between one-third to half a bottle. If your child is under 6 years old, it's crucial to consult a doctor before administering any medication.

Always keep this medication out of reach of children to prevent accidental ingestion. In the event of an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222. Your child's safety is the top priority, so please take these precautions seriously.

Geriatric Use

While there is no specific information available about the use of this medication in older adults, it’s important to approach any new treatment with caution. Since older adults may have different health needs and responses to medications, you should always consult with a healthcare provider before starting any new medication. They can help determine the right dosage and monitor for any potential side effects, ensuring that the treatment is safe and effective for you or your loved one.

Renal Impairment

If you have kidney disease, it's important to consult your doctor before using this medication. Your healthcare provider can help determine if it's safe for you and if any adjustments to your dosage are necessary. Always prioritize open communication with your doctor regarding your kidney health to ensure the best care.

Hepatic Impairment

If you have liver problems, it's important to know that the information provided does not include specific guidelines for dosage adjustments, special monitoring, or precautions related to your condition. This means that there are no tailored recommendations for how the medication may affect you differently due to your liver health.

It's always best to discuss your liver condition with your healthcare provider before starting any new medication. They can provide personalized advice and ensure that your treatment is safe and effective for you.

Drug Interactions

It's important to have open conversations with your healthcare provider about any medications or tests you may be taking. While there are no specific drug interactions or laboratory test interactions noted for this medication, your healthcare provider can help ensure that everything you are taking works well together and is safe for you. Always share your full list of medications and any health concerns during your appointments to receive the best care possible.

Storage and Handling

To ensure the best performance of your product, store it in a cool, dry place at temperatures between 46ºF and 86ºF (8ºC and 30ºC). It's important not to refrigerate the product, as this can affect its effectiveness. Additionally, keep it away from excessive heat and freezing conditions to maintain its quality.

When using the product, remember to discard any unused portion within 24 hours after opening the bottle. This helps ensure safety and effectiveness, so always check the time after opening to avoid using expired material.

Additional Information

You should take this medication orally. If you are pregnant or breastfeeding, it's important to consult a healthcare professional before using it. Always keep this medication out of reach of children. In the event of an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222.

FAQ

What is Magnesium Citrate used for?

Magnesium Citrate is used to relieve occasional constipation (irregularity).

How quickly does Magnesium Citrate work?

It generally produces a bowel movement in 1/2 to 6 hours.

How should I take Magnesium Citrate?

You should drink a full glass (8 ounces) of liquid with each dose. It may be taken as a single daily dose or in divided doses.

What is the recommended dosage for adults and children over 12?

Adults and children 12 years of age and over should take 1/2 bottle to 1 bottle (10 fl oz).

What is the dosage for children aged 6 to 11?

Children 6 to 11 years of age should take 1/3 bottle to 1/2 bottle.

What should I do if I have rectal bleeding or no bowel movement after using Magnesium Citrate?

You should stop use and ask a doctor, as these could be signs of a serious condition.

Are there any precautions I should take before using Magnesium Citrate?

Yes, ask a doctor before use if you have kidney disease, a magnesium or sodium restricted diet, stomach pain, nausea, vomiting, or a sudden change in bowel habits lasting more than 1 week.

Can I use Magnesium Citrate if I am pregnant or breastfeeding?

If you are pregnant or breastfeeding, you should ask a health professional before use.

What should I do in case of an overdose?

In case of overdose, get medical help or contact a Poison Control Center (1-800-222-1222) right away.

How should I store Magnesium Citrate?

Store it between 46º-86ºF (8º-30ºC), do not refrigerate, and protect it from excessive heat and freezing.

Packaging Info

Below are the non-prescription pack sizes of Onelax (magnesium citrate). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Onelax.
Details

Drug Information (PDF)

This file contains official product information for Onelax, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Description

No description information is available for the specified drug.

Uses and Indications

This drug is indicated for the relief of occasional constipation (irregularity). It generally produces a bowel movement within 0.5 to 6 hours after administration.

Dosage and Administration

Patients should consume a full glass (8 ounces) of liquid with each dose. The medication may be administered as a single daily dose or divided into multiple doses throughout the day.

For adults and children aged 12 years and older, the recommended dosage ranges from 1/2 bottle to 1 bottle (10 fl oz). For children aged 6 to 11 years, the appropriate dosage is between 1/3 bottle to 1/2 bottle.

For children under 6 years of age, it is advised to consult a healthcare professional for appropriate dosing recommendations.

Contraindications

Laxative products are contraindicated for use beyond one week unless directed by a healthcare professional. Prolonged use may lead to dependency or other adverse effects. Additionally, exceeding the maximum recommended daily dosage within a 24-hour period is contraindicated due to the potential for serious side effects and complications.

Warnings and Precautions

The use of laxative products requires careful consideration to ensure patient safety and efficacy. It is imperative that these products are not utilized for longer than one week unless specifically directed by a healthcare professional.

Healthcare providers should advise patients to consult a physician prior to use if they have any of the following conditions: kidney disease, a magnesium-restricted diet, a sodium-restricted diet, stomach pain, nausea, or vomiting. Additionally, patients who have experienced a sudden change in bowel habits lasting more than one week should seek medical advice before using laxatives.

Patients currently taking prescription medications should also be encouraged to discuss their use of laxative products with a doctor or pharmacist to avoid potential drug interactions.

While using laxative products, it is crucial that patients adhere to the maximum recommended daily dosage within a 24-hour period. Exceeding this dosage can lead to adverse effects.

Patients must be instructed to discontinue use and consult a healthcare professional if they experience rectal bleeding or if there is no bowel movement following the use of the product, as these symptoms may indicate a serious underlying condition.

In the event of an overdose, immediate medical assistance should be sought, or the Poison Control Center (1-800-222-1222) should be contacted without delay.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this product. Serious adverse reactions may include rectal bleeding or the absence of bowel movement after use, which could indicate a serious underlying condition. In such cases, patients are advised to stop use and consult a healthcare professional immediately.

Before using this product, patients should seek medical advice if they have a history of kidney disease, are on a magnesium-restricted or sodium-restricted diet, are experiencing stomach pain, nausea, or vomiting, or have noticed a sudden change in bowel habits lasting more than one week.

It is important to note that laxative products should not be used for longer than one week unless directed by a healthcare provider. Patients should also adhere to the maximum recommended daily dosage within a 24-hour period to avoid potential complications.

For pregnant or breastfeeding individuals, consultation with a healthcare professional is recommended prior to use. In the event of an overdose, patients should seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222.

Drug Interactions

There are currently no documented drug interactions or interactions with laboratory tests associated with this medication. As such, no specific recommendations for dosage adjustments or monitoring are necessary at this time. Healthcare professionals should continue to assess individual patient circumstances and consider any potential interactions based on the patient's overall medication regimen.

Packaging & NDC

Below are the non-prescription pack sizes of Onelax (magnesium citrate). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Onelax.
Details

Pediatric Use

Pediatric patients aged 12 years and over may be administered 1/2 bottle to 1 bottle (10 fl oz). For children aged 6 to 11 years, the recommended dosage is 1/3 bottle to 1/2 bottle. It is advised that children under 6 years of age consult a doctor prior to use.

Healthcare professionals should ensure that the product is kept out of reach of children. In the event of an overdose, immediate medical assistance should be sought, or the Poison Control Center (1-800-222-1222) should be contacted.

Geriatric Use

There is no specific information available regarding the use of this medication in geriatric patients, including dosage adjustments, safety concerns, or special precautions. Healthcare providers should exercise caution when prescribing this medication to elderly patients, as individual responses may vary. Monitoring for potential adverse effects and therapeutic efficacy is recommended in this population.

Pregnancy

Pregnant patients and those who are breastfeeding should consult a healthcare professional prior to using this medication. The potential risks and benefits must be carefully weighed, as the effects on fetal outcomes and lactation are not fully established. It is essential for women of childbearing potential to seek medical advice to ensure the safety of both the mother and the developing fetus.

Lactation

Lactating mothers are advised to consult a health professional prior to using this medication. There is currently no available data on the excretion of this drug in human breast milk or its effects on breastfed infants. Therefore, caution is recommended when administering this medication to lactating individuals.

Renal Impairment

Patients with renal impairment should consult a healthcare professional prior to use, particularly if they have a history of kidney disease. It is essential to assess renal function and consider potential dosing adjustments or monitoring requirements based on the degree of impairment.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to the use of this medication. Consequently, there are no established dosage adjustments, special monitoring requirements, or precautions outlined for individuals with compromised liver function. It is recommended that healthcare providers exercise caution when prescribing this medication to patients with hepatic impairment, given the lack of data on its safety and efficacy in this population. Regular monitoring of liver function may be prudent in these cases, although specific parameters are not defined in the available information.

Overdosage

In the event of an overdose, it is imperative to seek immediate medical assistance. Healthcare professionals should advise patients or caregivers to contact a Poison Control Center at 1-800-222-1222 without delay. Prompt intervention is crucial to mitigate potential adverse effects associated with overdose.

Symptoms of overdose may vary depending on the specific substance involved; therefore, a thorough assessment and monitoring of the patient are essential. Healthcare providers should be prepared to manage any symptoms that may arise and provide supportive care as necessary.

Management of an overdose typically involves stabilization of the patient, symptomatic treatment, and, if appropriate, the use of specific antidotes. Continuous monitoring of vital signs and clinical status is recommended to ensure patient safety and effective management of the overdose situation.

Nonclinical Toxicology

No teratogenic or non-teratogenic effects have been reported in the available nonclinical studies. Additionally, there is no information regarding animal pharmacology and toxicology. The absence of data in these areas limits the understanding of the compound's potential effects in nonclinical settings.

Postmarketing Experience

No postmarketing experience details are available in the insert text.

Patient Counseling

Healthcare providers should advise patients to seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222 in the event of an overdose. It is important to inform patients that laxative products should not be used for longer than one week unless specifically directed by a physician.

Patients should be instructed to discontinue use and consult a doctor if they experience rectal bleeding or if there is no bowel movement after using the product, as these symptoms may indicate a serious medical condition. Providers should emphasize the importance of adhering to the maximum recommended daily dosage and not exceeding it within a 24-hour period.

Additionally, healthcare providers should encourage patients to consult with a doctor prior to use if they have any of the following conditions: kidney disease, a magnesium-restricted diet, a sodium-restricted diet, stomach pain, nausea, vomiting, or if they have noticed a sudden change in bowel habits lasting more than one week. It is also advisable for patients to speak with a doctor or pharmacist before using the product if they are currently taking any prescription medications.

Storage and Handling

The product is supplied in a configuration that includes specific NDC numbers, which are essential for identification and inventory management. It is crucial to store the product within the temperature range of 46ºF to 86ºF (8ºC to 30ºC). Refrigeration is not permitted, and the product must be protected from excessive heat and freezing conditions to maintain its integrity.

Healthcare professionals should ensure that any unused product is discarded within 24 hours of opening the bottle to prevent potential degradation or contamination. Proper adherence to these storage and handling guidelines is essential for ensuring the product's efficacy and safety.

Additional Clinical Information

The medication is administered orally. Clinicians should advise patients who are pregnant or breastfeeding to consult a health professional prior to use. It is essential to keep the medication out of reach of children, and in the event of an overdose, patients should seek medical assistance or contact a Poison Control Center immediately at 1-800-222-1222. No further information is available regarding laboratory tests, abuse potential, or postmarketing experiences.

Drug Information (PDF)

This file contains official product information for Onelax, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Data Generation & Sources

This page was automatically generated and is maintained by the AllDrugs AI Data-Science Team. It was built from the FDA Structured Product Label (DailyMed) for Onelax, retrieved by a validated AI data-extraction workflow.

All FDA-listed dosage forms and strengths are shown in the Packaging & NDC Codes section above. Regulatory status appears in the Summary Information panel above and was verified in the FDA National Drug Code directory and the NSDE NDC Directory daily file.

Note: an automated daemon monitors NSDE checksums; when the record for this NDC changes, the new file is pulled instantly and this page is refreshed.

No human clinician has reviewed this version.

Learn more in our Editorial Policy

Last AI update:

Primary FDA sources:

Orange Book data shown on this page are limited to Regulatory Status (Rx), Established Pharmacologic Class (EPC), and Mechanism of Action (MoA).

Regulatory data notice: Information on this page is reproduced verbatim from FDA public databases (NSDE, Orange Book, Purple Book, DailyMed SPL). NDA/ANDA drugs are FDA-approved, BLA biologics are FDA-licensed. Inclusion alone does not guarantee current market availability or imply FDA endorsement.

Medical disclaimer: This AI-generated content is provided for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional for diagnosis or treatment decisions.