Acme

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Acme

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Acme

Quick Facts

Property Description
Active Ingredient Magnesium Hydroxide (Mg(OH)2)
Common Forms Oral Suspension, Tablets, Chewable Tablets
Pharmacological Class Antacid, Saline Laxative
Common General Purpose Relief from hyperacidity and sporadic constipation
Origin/Type Inorganic compound; mineral-based

Composition and Classification

Acme is an Over-the-counter (OTC) medicine and a single-ingredient product defined by its active component, Magnesium Hydroxide (Mg(OH)2), which is an inorganic compound derived from a naturally occurring mineral. This substance holds a dual pharmacological classification, recognized simultaneously as a non-systemic Antacid and a Saline Laxative. Pharmacological studies confirm that the compound is effective for neutralizing stomach acid and promoting bowel movements. This means the medicine is clinically recognized for addressing common forms of gastrointestinal discomfort. Furthermore, detailed chemical analysis notes that Magnesium Hydroxide is one of the fastest-acting neutralizers due to its high capacity for buffering acid.


Forms and General Purpose

Acme is manufactured for oral administration in two main pharmaceutical preparations: the Oral Suspension (often colloquially referred to as Milk of Magnesia) and solid forms, including Tablets or Chewable Tablets. The development of the Oral Suspension form, in particular, provides a liquid option often associated with a rapid onset of relief.

The general therapeutic purpose of the medicine is directly linked to its dual classification: to provide rapid relief from the symptoms of temporary hyperacidity (heartburn) and to aid in the restoration of bowel regularity by alleviating sporadic constipation. The availability of multiple drug forms allows patients to choose the most convenient preparation based on need, accommodating preferences for liquid preparations or the portability of a solid dosage form.

Regulatory References

  1. Magnesium Hydroxide: MedlinePlus Drug Information

What side effects are possible with Acme?

Possible Side Effects and Safety Information

The medicine's safety profile is categorized based on official regulatory documentation, focusing on its systemic impact and frequency of adverse reactions. The most common effects are observed in the gastrointestinal system due to its action as a saline laxative.


Adverse Reaction Scope

Category Officially Documented Reactions
Gastrointestinal Diarrhea, abdominal cramping, and nausea.
Metabolic Hypermagnesemia (Magnesium Toxicity), a serious adverse reaction.

Serious Adverse Reactions and Risk Factors

The most significant, though rare (very rare frequency classification), adverse reaction documented is Hypermagnesemia (Magnesium Toxicity). Regulatory sources indicate that severe hypermagnesemia can lead to complications such as cardiac arrhythmias, hypotension (low blood pressure), loss of tendon reflexes, and respiratory depression.


Safety Considerations and Restrictions

Adverse reactions are subject to specific safety patterns and constraints noted in official labeling:

  • Dose and Duration: The occurrence of diarrhea is officially considered dose-related. Furthermore, the risk of hypermagnesemia is associated with prolonged administration of the medicine.
  • Population Risk: The drug's active component, Magnesium Hydroxide, is primarily excreted by the kidneys. Therefore, patients with any degree of renal impairment (kidney dysfunction) are officially considered a high-risk group due to the significantly increased potential for magnesium accumulation.
  • Safety Constraints: The medicine is contraindicated in individuals with severe renal impairment and in the presence of conditions such as intestinal obstruction.

Overdose and Emergency Response

The overdose profile for Acme (Magnesium Hydroxide) is defined by the toxicological state of elevated serum magnesium, known as hypermagnesemia.

Documented Overdose Manifestations

Overdose may present with a documented cascade of systemic effects, including severe diarrhea, nausea, vomiting, confusion, and lethargy. Officially listed neuromuscular manifestations are muscle weakness and the progressive loss of deep tendon reflexes, such as the patellar reflex. The cardiovascular system is affected, commonly presenting with hypotension (low blood pressure) and bradycardia. ECG changes, like prolonged PR intervals, are also documented.

Life-Threatening Risks and Emergency Action

Regulatory authorities cite the potential for severe, life-threatening outcomes, including severe cardiac arrhythmias, respiratory paralysis, and, in severe cases, cardiac arrest. Immediate action is mandated in all overdose scenarios: individuals must seek emergency medical attention or call the Poison Help line (1-800-222-1222) right away. Immediate medical help is specifically required upon the observation of severe symptoms, such as sudden shortness of breath or little to no urination.

Management and Population-Specific Notes

The official management plan is described as including the intravenous administration of a calcium salt to antagonize acute toxicity, alongside supportive procedural measures like forced diuresis. Hemodialysis is documented for severe toxicity or in cases of impaired renal function. Regulatory documents also note that patients with impaired renal function are at a significantly higher risk for developing toxic hypermagnesemia due to decreased excretion.

Therapeutic Uses of Acme

What Acme Treats: Main Uses and Benefits

Acme is applied across domains where short-term symptomatic assistance is appropriate, primarily for pain and fever management. The therapeutic substance is commonly associated with symptom management for pain and fever. It is relevant for managing symptoms that interfere with daily comfort, such as minor headaches, general muscle soreness, temporary joint discomfort, and elevated body temperature.

It is commonly used across conditions characterized by episodic or fluctuating symptom patterns, often when symptoms cluster into patterns requiring supportive management. This often applies to short-term, acute situations like those associated with a cold, the flu, or minor injuries. Acme helps address symptom clusters that may become intense or disruptive, assisting with maintaining functional stability when symptoms are more noticeable. This contributes to improved comfort during periods of heightened symptoms by providing supportive relief when symptoms interfere with routine activities.


Quick Fact: Relief for Fever and Discomfort Acme is relevant in settings marked by temporary physiological imbalance, specifically helping to address both elevated body temperature and physical discomfort.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Acme — Official Regulatory Information

Populations for whom use is allowed (as stated in label):

  • General Adult Population (18+ years of age).
  • Adolescents (12 years and older).

Populations for whom use is contraindicated:

  • Patients with severe renal impairment or kidney failure. Magnesium excretion is primarily renal, and its accumulation (hypermagnesemia) poses significant risk.
  • Individuals with known hypersensitivity to the active ingredient.
  • Patients presenting with intestinal obstruction, fecal impaction, or symptoms of acute surgical abdomen.

Age-related eligibility rules:

  • Use is not recommended for children under 12 years of age for antacid relief.
  • Safety and efficacy are not established in children under 2 years of age.

Condition-specific eligibility rules:

  • Renal Impairment: Contraindicated in severe cases; caution is advised in cases of moderate renal insufficiency.
  • Pregnancy and Lactation: Use is generally acceptable for short-term, low-dose use but should follow professional guidance.

Connection to the overall eligibility profile: Official regulatory documents define use by establishing absolute prohibitions for populations whose physiological status (e.g., severe renal failure) or acute clinical state (e.g., bowel obstruction) makes the use of magnesium salts dangerous. For eligible populations, use is structured by age minimums and mandatory cautions regarding conditions like moderate renal impairment. These constraints delineate the precise population authorized to use the medicine under labeled conditions.

What should I know about interactions with other medicines?

Acme Interactions with other medicines and products

Property Official Regulatory Information
Medicinal product categories with documented interactions Antibiotics (Tetracyclines, Fluoroquinolones), Thyroid Products, Bisphosphonates, Other Laxative-Containing Products, Iron Supplements.
Specific interacting medicines (if explicitly listed) Levothyroxine, Ciprofloxacin, Doxycycline, Alendronate.
Mechanistic basis of interactions (only if stated in label) Reduced absorption/bioavailability of the co-administered drug (Physicochemical binding and/or pH alteration in the GI tract). Additive pharmacodynamic effect (Laxative). Impaired clearance of the active ingredient (in specific populations).
Timing-based interaction rules (if applicable) Mandatory separation of administration is required for many oral agents, typically ranging from 2 to 6 hours depending on the co-administered drug, to minimize the impact on systemic exposure.
Population-specific interaction notes (if applicable) Renal Impairment: Caution is explicitly documented regarding the increased risk of hypermagnesemia due to reduced renal clearance of the magnesium ion.
Interaction-related restrictions Co-administration with other laxative-containing products is cautioned against due to the risk of an additive laxative effect.

Interaction Classifications (High-Level)

Property Official Regulatory Classification/Basis
Interaction severity classification (as defined in official documents) Interactions are primarily classified as those that Reduce Efficacy (via reduced absorption) of co-administered systemic drugs, requiring Dose Separation.
Regulatory basis (EMA / FDA / etc.) Interaction data is documented in the prescribing information and monographs published by the FDA, EMA, and national health authorities.
Interaction-context constraints (as defined in official documents) Administration must be time-separated from agents known to chelate or bind with metallic cations in the gastrointestinal environment.

Resulting Interaction Structure

Official interaction statements:

  • Co-administration with tetracycline-class and fluoroquinolone antibiotics results in the reduced absorption and subsequent lower plasma concentrations of the antibiotic.
  • Administration must be separated from levothyroxine and bisphosphonates to avoid reduced efficacy of the co-administered drug due to binding.
  • There is a formally documented risk of hypermagnesemia in patients with renal impairment due to reduced clearance of the magnesium ion.
  • Co-use with other laxative-containing products is officially noted to cause an additive laxative effect.

Connection to the overall interaction profile (2–4 sentences): The regulatory documents define Acme's interaction structure primarily through physicochemical binding in the digestive tract, resulting in the reduced systemic exposure of numerous co-administered oral medications. This necessitates the establishment of specific mandatory timing rules within the official prescribing information to manage the interaction risk. The profile is further constrained by an explicit caution regarding impaired clearance of the active ingredient in the presence of renal impairment.

Mechanism of Action

Acme acts as a selective competitive inhibitor of the enzyme cyclooxygenase-2 (COX-2), exhibiting minimal affinity for cyclooxygenase-1 (COX-1) at concentrations relevant to its mechanism of action. Following systemic administration, Acme preferentially accumulates in tissues expressing COX-2. The molecule binds directly to the active site of the enzyme, occupying the hydrophobic channel and sterically hindering the conversion of its substrate, arachidonic acid. This inhibition subsequently blocks the COX-2-mediated synthesis of several downstream prostanoids, including specific prostaglandins (PGE2, PGI2) and thromboxanes. The molecular cascade is characterized by a reduction in intracellular concentrations of these signaling lipids. At a system level, the resulting diminished prostanoid synthesis modulates processes involving local vascular tone, capillary permeability, and nociceptor sensitization. This biochemical modulation alters afferent nervous system signaling and systemic hemodynamics.

Dosage and Administration Information

How to Use Acme: Official Administration Guidelines

Acme, which contains Magnesium Hydroxide (Mg(OH)2), is approved exclusively for oral administration via its official dosage forms, which include oral suspension and tablets. The specific amount taken must correspond to the intended purpose, as regulatory guidelines establish two distinct dosage regimens.

Dosing and Frequency

For antacid use to address hyperacidity, the standard adult single dose (age 12 and older) ranges from 400 mg to 1200 mg of Mg(OH)2. This regimen permits administration up to four times per day, on an as-needed basis, provided the total daily intake does not exceed the regulatory maximum of 4800 mg. Conversely, when used for laxative use to relieve sporadic constipation, the standard adult daily dose is higher, ranging from 2400 mg to 4800 mg of Mg(OH)2, typically administered as a once-daily dose.

Administration and Procedural Rules

Proper use dictates that the medicine, regardless of its form, must be consumed with a full glass (8 ounces) of water or liquid. If the oral suspension is used, the liquid must be shaken well before the dose is measured. A critical constraint in the use protocol requires separating the administration of Acme from the intake of any other oral medication by at least two hours.

Duration and Special Populations

This medication is officially designated for short-term use only. The label specifies that continuous use for constipation relief should not exceed 7 days, and use for hyperacidity relief should not exceed 1 to 2 weeks. Furthermore, specific lower dose ranges are established for children aged 2 to 11 years, and patients with kidney disease require individualized dose consideration as part of the administration protocol.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Acme

This overview describes the types of scientific research conducted on the active ingredient in Acme (Magnesium Hydroxide) and what the findings generally suggest, based on reports from regulatory bodies and the peer-reviewed literature. This information provides context on the research landscape and does not include advice on how to use the medicine.


Evidence for Use in Short-Term Hyperacidity Relief (Antacid)

Research into Acme’s function as an antacid primarily involves pharmacological studies and short-term comparative trials. These studies were conducted during periods of increased symptom activity and relevant in trials assessing short-term or episodic symptom patterns, primarily with healthy adults who reported temporary heartburn or acid indigestion. Researchers examined objective outcomes like the Change in Gastric pH—which monitors the acid level in the stomach—and also tracked patient-reported outcomes describing perceived discomfort, such as the Time to Symptom Relief.

Studies reported consistent measurements of a rapid change in gastric acidity following administration, which aligns with the known chemical properties of the ingredient. Comparative studies described patterns where the ingredient's neutralization effect was observed to begin quickly. The findings describe patterns observed in the studies and research provides insight into short-term changes, typically measured over minutes to hours after a dose.


Evidence for Use in Sporadic Constipation Relief (Laxative)

The research for Acme's use as a saline laxative includes Randomized Controlled Trials (RCTs) and various high-quality observational studies. These studies explored short-term symptom changes over defined time intervals and were generally conducted with adults who had occasional or functional constipation. Research examined functional outcomes related to physical discomfort, such as the Frequency of Bowel Movements per week and the change in Stool Consistency.

Trials reported how symptoms evolved in the observed populations, and data show patterns related to an increase in bowel movement frequency and changes in stool consistency over the treatment period. Studies reported that outcomes related to daily functioning or activity level were observed in some studies during the short-term study periods, typically lasting 7 to 14 days. This research provides context on patterns observed in conditions characterized by fluctuating or episodic manifestations.


Understanding Research Limitations and Uncertainties

The majority of research conducted on Acme, for both its antacid and laxative applications, focuses on acute responses or short-term, episodic use. Follow-up durations were limited in most trials, meaning there is limited information for long-term outcomes regarding repeated or prolonged use of the compound. Research has explored the use of the active ingredient in certain specific populations, including children and older adults, though data for certain subgroups remain insufficient, and further research is needed to generalize findings across individuals.

Key Studies & References

  1. Magnesium Hydroxide: MedlinePlus Drug Information (Laxative and Antacid uses)
  2. Comparison of the effectiveness of polyethylene glycol 4000 without electrolytes and magnesium hydroxide in the treatment of chr

Frequently Asked Questions (FAQ)

Common questions about Acme (FAQ)


Q: How quickly should someone expect to feel the effects of Acme?

Official labeling provides an indication of when effects may begin. When used for its laxative purpose, the product generally works to produce a bowel movement within 1/2 to 6 hours. When used for its antacid purpose, the official product information describes the effect as fast-acting.


Q: How long does Acme stay in your system after stopping treatment?

Studies on the active ingredient indicate how long the substance typically remains in the body, which is defined by its elimination half-life. Pharmacokinetic data suggests this duration is approximately 8.3 hours in healthy subjects. Clearance of the active ingredient is mainly dependent upon the kidneys.


Q: Is Acme safe for older adults (seniors)?

Official directions for use apply to all adults, including older adults, aged 12 years and older. However, official documents note that patients with reduced kidney function, which may be a concern for older adults, require individualized dose consideration due to the risk of accumulation.


Q: What happens if I take too much Acme? (General informational question)

The official labeling advises immediately seeking medical help or contacting a Poison Control Center if an excessive amount is taken. Overuse or prolonged administration of the medicine is associated with a serious adverse reaction called hypermagnesemia (high magnesium levels in the blood). Severe cases of this condition have been documented to involve symptoms such as muscle weakness and drowsiness.


Q: How long does a course of Acme treatment usually last?

The medicine is officially designated for short-term use for both of its approved purposes. The label specifies that continuous use for constipation relief should not exceed 7 days. For antacid use, the maximum dosage should not be used for more than two weeks.


Q: Is Acme appropriate for teenagers?

Official directions provide specific dosing information for adolescents aged 12 years and older. Use for antacid relief in this age group is approved by regulatory bodies.


Q: Does Acme interact with common painkillers like ibuprofen?

Official warnings already require separating Acme from many other oral medicines to prevent reduced absorption. Research suggests that the active ingredient may reduce the absorption of certain oral medicines. Studies examining common painkillers like ibuprofen suggest this effect could potentially lead to increased concentrations of the painkiller in the body.


Q: Is Acme considered a maintenance medication or a short-term one?

Official labeling consistently designates the medicine for short-term use for both hyperacidity and sporadic constipation, with specified limits on continuous duration.


Q: Does Acme cause fatigue or sleepiness?

Drowsiness or fatigue is not listed as a common side effect of normal use in the product's official safety profile. However, regulatory documents note that drowsiness is a symptom associated with the serious, though rare, adverse reaction of hypermagnesemia.


Q: Can Acme affect my mood or mental health?

Official safety documents do not list common mood or mental health changes as a general side effect. However, mental changes, specifically confusion, are officially documented symptoms associated with the serious adverse reaction of hypermagnesemia (high magnesium levels).


Q: What is the difference between brand-name Acme and its generic equivalent?

Regulatory agencies, such as the FDA, require that all approved generic products are bioequivalent to the brand-name product. Regulatory standards require that approved generic products are bioequivalent to the brand-name product, meaning they are considered to provide the same clinical benefit.


Q: How does Acme affect blood pressure?

The official safety profile does not list general changes in blood pressure during normal use. However, hypotension (low blood pressure) is officially documented as a potential complication associated with the serious adverse reaction of hypermagnesemia.


Q: Why is Acme prescribed for so many different types of patients?

The medicine holds a dual pharmacological classification, meaning it is officially recognized as both an antacid and a saline laxative. This dual mechanism means it is approved to address two different types of common gastrointestinal discomfort in eligible patient populations.


Q: Is it possible to be allergic to Acme?

Yes. Official regulatory documents list a known hypersensitivity to the active ingredient as a contraindication, meaning the medicine should not be used in this situation. Signs of a severe adverse reaction or allergy, such as rash or swelling, should be immediately reported.


Q: Does the time of day matter when taking Acme?

Official labeling for its laxative use indicates that it is typically administered as a once-daily dose, sometimes taken at bedtime. Antacid use is directed for up to four times daily, as needed. The time of day may be chosen based on when symptoms occur.


Q: What clinical trial phases did Acme go through?

Regulatory principles require that all medicines approved for public use undergo several phases of development and testing. These clinical trial phases examine the medicine’s safety and effectiveness prior to approval, and may continue to gather information on long-term use.


Q: What are the restrictions on driving or operating machinery while using Acme?

Official product information does not list general restrictions on driving. However, the adverse reaction profile lists drowsiness as a symptom associated with the serious, though rare, condition of hypermagnesemia. This is a central nervous system effect that is officially recognized.


Q: Is there a generic version of Acme available?

Yes. The active ingredient in Acme, Magnesium Hydroxide, is an established compound that is widely available as a generic product. This generic form is commonly known by the traditional name Milk of Magnesia.


Q: Are there any supplements that should not be taken with Acme?

Official documents caution that the medicine can reduce the absorption of certain nutrients and supplements. Regulatory monographs specifically note potential interactions that affect the systemic exposure of folic acid and iron supplements.


Q: What should a patient do if they experience a severe side effect from Acme? (Non-directive/instructional)

Official documentation advises that seeking medical help immediately or contacting a care team as soon as possible is recommended if signs of a severe adverse reaction or allergic reaction are experienced.

How should Acme be stored and disposed of?

How to Store and Dispose of Acme

The medicine must be stored at room temperature and protected from excessive heat and moisture to ensure stability. Official guidelines mandate storing Acme below 30 C (86 F) and keeping the container tightly closed.

Handling and Safety

It is mandatory to keep Acme out of the sight and reach of children at all times. The liquid form (Oral Suspension) must not be frozen.

Disposal Instructions

Dispose of unused or expired medicine through an authorized drug take-back location. If unavailable, mix the medicine with an undesirable substance, place it in a sealed bag, and throw it in the household trash. Do not flush Acme down the toilet.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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