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What is Pac 20 Pill ? Know everything about Pac 20 Pill

Pac 20 Pill - Famotidine 20 mg


PAC 20 Pill is known as Pepcid AC Maximum Strength famotidine 20 mg and is used to treat Duodenal Ulcer, GERD, Hypersecretory conditions, and Non-ulcer dyspepsia.

PAC 20 Pill inhibits histamine production at H2-receptors of the gastric parietal cells, thereby inhibiting gastric acid secretion and gastric volume.

Pill NamePAC 20
Pregnancy CategoryB

Key Facts of PAC 20 Pill

Key Facts of  PAC 20 Pill
Key Facts of PAC 20 Pill
  • The usual dose of PAC 20 Pill is once a daily,
  • Headache and Diarrhea are the common side effects of PAC 20 Pill,
  • PAC 20 Pill can be taken safely in pregnancy and breastfeeding,
  • PAC 20 Pillcan reduces the amount of acid your stomach makes.
Active IngredientFamotidine
Strength20 mg
Route of AdministrationOral
PAC 20 Pill

Dosage of PAC 20 Pill

The standard dosage of PAC 20 Pill is usually once a day or twice a day. Dosage is entirely dependent on the patient’s condition and treatment response.

PAC 20 Pill Dosage Chart

Duodenal UlcerTwice a day
Gastric UlcerTwice a day
GERDOnce a day
Hypersecretory ConditionsStarting dosage: 20 mg every 6 hours;
adjust dosage to individual patient needs
Maximum dosage 160 mg every 6 hours
Erosive EsophagitisOnce a day

What if i forget to take any dose of Pac 20 pill?

Take the missed dose as soon as you remember it. However, skip the missed dose if it is almost time for the next dose.

Never take a double dose to make up the missed dose, as it may make you more prone to overdose symptoms.

What if i take too much of Pac 20 pill?

Taking too much Pac 20 pill may cause you some severe side effects. Call the poison health centre or your nearby hospital to seek an emergency help centre.

Common symptoms of Pac 20 Pill

  • Arrhythmia,
  • Diarrhoea,
  • Fever,
  • Hallucinations,
  • Confusion,
  • Dry skin,
  • Stevens-Johnson syndrome,
  • Anaphylaxis,

In the case of overdosage, symptomatic and supportive treatment should be employed. Emesis or Active Charcoal should be administered to remove unabsorbed pill ingredients from the gastrointestinal tract. Meantime the patient should be monitored, and supportive therapy should be employed.

Precautions of Pac 20 Pill

Allergic Reactions: People who had allergic reactions previously with any ingredient of Pac 20 Pill should avoid this pill.

CNS Disorders: Patients having agitation, seizures, and lethargy should consult a doctor before taking Pac 20 Pill.

Gastric Malignancy: Patients with gastric malignancy should consult a doctor before starting Pac 20 Pill.

Other Disorders: Patients with chronic lung disease and diabetes should also consult doctors.

Driving: Pac 20 pill may cause drowsiness and dizziness, which may hinder someone in concentrating and hence it is advised not to drive or operate any heavy machinery.

Drug Interaction of Pac 20 Pill

Pac 20 Pill is an antihistamine pill that decreases the absorption of different medications due to its impact in reducing acid secretion in the stomach.

Drug interaction can change the actions of Pac 20 Pill, and it may produce some mild to moderate side effects.

Following is the list of the drugs which may interact with Pac 20 Pill.

  • Dasatinib, 
  • Delavirdine mesylate,
  • Cefditoren,
  • Fosamprenavir,
  • Atazanavir, 
  • Erlotinib,
  • Ketoconazole, 
  • Itraconazole, 
  • Ledipasvir/so,
  • Fosbuvir, 
  • Nilotinib, 
  • Rilpivirine,

Side Effects of Pac 20 Pill

Pac 20 Pill can produce some mild to moderate side effects, and they are infrequent, and most people don’t even get it.

Common side effects of Pac 20 Pill:

Most of the side effects go away on their own without any special treatment. However, talk to your doctor if any side effects don’t disappear within a day. 

Pregnancy & Breastfeeding

Usually, Pac 20 Pill is said to be safe in the pregnancy. However, a doctor’s consultation is required before taking Pac 20 Pill.

Nursing mothers should avoid this pill as some drugs can be passed through breast milk unless the benefits outweigh the risk and recommend by the doctor.

How to Store Pac 20 Pill?

It is advised to store Pac 20 Pill in an airtight container that comes with it. Keep it away from the light, Moisture, Children and Pets.

In case of an expired pill, Contact your nearby pharmacist to know about the recycling of the medication and safe disposal of the pill.

Uses of Pac 20 Pill

PAC 20 Pill contains famotidine 20 mg as an active ingredient; Since we don’t have direct studies conducted on PAC 20 Pill, we will quote the results from studies conducted on famotidine.

Gastric Ulcers

PAC 20 Pill effectively reduces ulceration and also promotes the healing of gastric and duodenal ulcers.

According to a study conducted on a patient with ulceration shows, Significant healing, and reduction of ulceration on the use of 40 mg of famotidine twice a day.

Another study shows that the H2-receptor antagonist Famotidine, administered in an evening dose, dramatically speeds up the healing process of benign gastric ulcers. It also shows that it is a safe and effective treatment for gastric ulceration.


Famotidine is effective for ranitidine-resistant patients suffering from severe GERD and had rates of healing superior to those with ranitidine during a comparison trial.

Recent research has also shown that long-term treatment with famotidine is believed to be efficient in preventing recurrences in most patients who have the healing of reflux esophagitis.

Functional Dyspepsia

The study revealed significant improvements in functional dyspepsia and symptoms like belching, heartburn, and the sensation that acid is resurging.

Hypersecretory Conditions

This study shows that famotidine is similar to other antagonists for the H2-receptors. However, it has 30 percent more duration of action, and it is also nearly nine times as potent as ranitidine and 32 times more potent than Cimetidine. Famotidine is safe and highly efficient in the long-term therapy of hypersecretory gastric disorders.

FAQs of Pac 20 Pill

  1. What is Pac 20 Pill?

    PAC 20 Pill is known as Pepcid AC Maximum Strength famotidine 20 mg and is used to treat Duodenal Ulcer, GERD, Hypersecretory conditions, and Non-ulcer dyspepsia.

  2. Is it safe to consume Pac 20 Pill for longer duration?

    No, you should not consume pac 20 pill for more than 10 days. If you don't get relief within 10 days then you should talk to your doctor.

  3. Is Pac 20 pill addictive in nature?

    No, there are no evidence of Pac 20 pill causing any addiction in patients.

  4. How to take Pac 20 pill?

    It is advised to take Pac 20 pill after a meal to avoid any gastric side effects.

  5. Can i drive a vehicle after taking Pac 20 Pill?

    Pac 20 Pill is said to be causing drowsiness and sleepiness, Hence it is advised not to drive vehicle or operate any heavy machinery after taking Pac 20 pill.

  6. Does Pac 20 Pill affect any type of contraception?

    No, Pac 20 Pill does not affect any contraception in the men or womens.

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