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Acid Controller Maximum Strength (Pharmascience): Uses, Side Effects and Dosage

Updated:
Facts
Status:
Over-the-counter (OTC)
Strength:
20 mg
Active ingredient:
ATC code:

Patient Medication Information: uses, side effects, how to take - Acid Controller Maximum Strength (Pharmascience)

What is ACID CONTROLLER MAXIMUM STRENGTH used for?

  • ACID CONTROLLER MAXIMUM STRENGTH provides fast effective relief from heartburn, acid indigestion and upset or sour stomach due to excess stomach acid. In addition, when taken 10-15 minutes before a meal, ACID CONTROLLER MAXIMUM STRENGTH can actually prevent heartburn before it starts.

  • Day or night, ACID CONTROLLER MAXIMUM STRENGTH relieves and prevents these symptoms brought on by consuming food and/or beverage. One tablet, taken before your evening meal can prevent night-time heartburn symptoms so you can sleep through the night.

How does ACID CONTROLLER MAXIMUM STRENGTH work?

It is normal for the stomach to produce acid, especially after eating food and/or drinking beverages. However, too much acid, can cause, heartburn, acid indigestion and discomfort that interfere with everyday activities. ACID CONTROLLER MAXIMUM STRENGTH contains a medicine that actually reduces the production of excess stomach acid that causes these symptoms.

ACID CONTROLLER MAXIMUM STRENGTH is different from antacids that only neutralize existing stomach acid, but do not stop stomach acid from being produced. ACID CONTROLLER MAXIMUM STRENGTH actually stops tough heartburn before it starts. Just ACID CONTROLLER MAXIMUM STRENGTH tablet provides long lasting acid control, for up to 12 hours day or night. Acid control may not directly correlate to symptom relief.

What are the ingredients in ACID CONTROLLER MAXIMUM STRENGTH ?

Medicinal ingredients: famotidine 20 mg

Non-medicinal ingredients: Hydroxypropyl cellulose, hypromellose, iron oxide red, iron oxide yellow, magnesium stearate, microcrystalline cellulose, pregelatinized corn starch, purified water, talc, and titanium dioxide.

ACID CONTROLLER MAXIMUM STRENGTH comes in the following dosage forms:

20 mg film-coated tablet to ease swallowing.

Do not use ACID CONTROLLER MAXIMUM STRENGTH if:

  • You are allergic to Famotidine or any nonmedicinal ingredients (see What are the ingredients in ACID CONTROLLER MAXIMUM STRENGTH?) in this product
  • You have had an allergic reaction to another product that contains an acid reducer (e.g. ranitidine)
  • With another acid reducer

To help avoid side effects and ensure proper use, talk to your healthcare professional before you take ACID CONTROLLER MAXIMUM STRENGTH. Talk about any health conditions or problems you may have, including if you:

  • are pregnant or breast-feeding

  • have difficulty or pain on swallowing, severe vomiting, passage of red/black blood in the stools, wheezing, choking, or your stomach pains continue
  • have kidney disease, as you may need a dose adjustment
  • have any other severe illnesses
  • are over 40 years of age and you are experiencing new or recently changed symptoms of acid indigestion or heartburn
  • are taking any prescription or over-the-counter medications such as nonsteroidal anti- inflammatory drugs [NSAIDs] (because NSAIDs may be causing your symptoms)
  • have a previous history of erosive esophagitis, irritable bowel syndrome or ulcer disease complications
  • are experiencing unintended weight loss in association with your symptoms of acid indigestion or heartburn
  • have heartburn over 3 months as this may be a sign of a more serious condition
  • are taking a proton pump inhibitor
  • heartburn is frequent (>3 times per week) and/or severe
  • have heartburn with light headedness, sweating and dizziness
  • have chest or shoulder pain with shortness of breath, sweating, pain spreading to arms or neck, or light headedness

Other warnings you should know about:

Stop use and ask a doctor if:

  • your heartburn continues or worsens
  • new symptoms develop
  • you need to take this product for more than 14 days

ACID CONTROLLER MAXIMUM STRENGTH is not expected to affect your ability to drive or operate machinery. However, if tiredness or dizziness occur, you should not drive or use machines.

Tell your healthcare professional about all the medicines you take, including any drugs, vitamins, minerals, natural supplements or alternative medicines.

The following may interact with ACID CONTROLLER MAXIMUM STRENGTH:

  • posaconazole oral suspension and itraconazole (for fungal infection)
  • calcium carbonate
  • most of the tyrosine kinase inhibitors: dasatinib, erlotinib, gefitinib, pazopanib (to treat cancers)

How to take ACID CONTROLLER MAXIMUM STRENGTH:

Swallow each tablet whole with a glass of water

Usual dose:

Adults and children 12 years of age or older: For relief of symptoms, swallow one (1) tablet with full glass of water. For prevention of acid-related symptoms brought on by consuming food and/or beverage swallow one (1) tablet with full glass of water 10 to 15 minutes before eating. If symptoms return, you may take another tablet. Do not take more than two tablets during a 24-hour period.

What Else Can Be Done to Avoid Symptoms:

  • Do not lie down soon after eating
  • If you are overweight, lose weight
  • If you smoke, stop or cut down
  • Avoid foods known to cause symptoms, and avoid or limit foods such as caffeine, chocolate, fatty foods, spicy foods and alcohol
  • Do not eat just before bedtime
  • Raise the head of your bed
  • Wear loose fitting clothing around your stomach

Overdose:

If you think you, or a person you are caring for, have taken too much ACID CONTROLLER MAXIMUM STRENGTH contact a healthcare professional, hospital emergency department, regional poison control centre or Health Canada’s toll-free number, 1-844 POISON-X (1-844-764-7669) immediately, even if there are no signs or symptoms.

What are possible side effects from using ACID CONTROLLER MAXIMUM STRENGTH?

ACID CONTROLLER MAXIMUM STRENGTH is generally well tolerated. Side effects such as headache, diarrhea, lung infections, and vomiting were reported in studies where people took either the drug or a placebo (tablet with no medication). Each group had about the same number of side effects.

Serious side effects and what to do about them

Symptom / effect

Talk to your healthcare

professional

Stop taking drug and get immediate medical help
Only if severeIn all cases
VERY RARE
Dizziness and sleepiness✓

Stomach pain, diarrhea, dry

mouth, nausea, and vomiting

✓

Allergic reactions such as rash, hives, swelling, itching and

difficulty breathing

✓

If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, tell your healthcare professional.

Reporting Side Effects

You can report any suspected side effects associated with the use of health products to Health Canada by:

  • Visiting the Web page on Adverse Reaction Reporting (canada.ca/drug-device-reporting) for information on how to report online, by mail or by fax; or
  • Calling toll-free at 1-866-234-2345.

NOTE: Contact your healthcare professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.

Storage:

Store tablets at 15°C - 30°C. Protect from moisture.

Keep out of reach and sight of children.

If you want more information about ACID CONTROLLER MAXIMUM STRENGTH:

  • Talk to your healthcare professional
  • Find the full product monograph that is prepared for healthcare professionals and includes the Patient Medication Information by visiting the Health Canada Drug Product Database website: (https://www.canada.ca/en/health-canada/services/drugs-health-products/drug-products/drug-product-database.html); the manufacturer’s website www.pharmascience.com or by calling 1-888-550-6060.

Date of Authorization: 2026-04-17

About this document

Source: Health Canada – Drug Product Database (DPD) and product monographs · DIN (Drug Identification Number): 02557169

Approved according to the text: April 17, 2026

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Acid Controller Maximum Strength (Pharmascience)

Rx or OTC
Over-the-counter (OTC)?
DIN 02557169
Schedule(s) NON-PRESCRIPTION DRUGS
Active ingredient(s) Famotidine 20 MG
Dosage form(s) Tablet
Route(s) of administration Oral
Drug class (WHO ATC)
  1. A Alimentary tract and metabolism drugs
    1. A02 Drugs for acid related disorders
      1. A02B Drugs for peptic ulcer and gastro-oesophageal reflux disease (GORD)
        1. A02BA Histamine H2 receptor antagonists for peptic ulcer and GORD
          1. A02BA03 Famotidine
Company PHARMASCIENCE INC
Current status Approved
Current status date April 28, 2025

Source: Health Canada – Drug Product Database (DPD) and product monographs, data as of November 1, 2026. Data from the Health Canada Drug Product Database, as published there. Not a substitute for the advice of a doctor or pharmacist.