Simethicone is a medicine that can be prescribed for excess gas. It works by breaking air bubbles and gas build up in the stomach or intestine, which can help to promote their elimination to relieve pain and pressure.

This medication is sold in pharmacies in the form of tablets, solution in drops or gelatin capsules. It is available for purchase over-the-counter.

Although a prescription is not necessary and side effects are rare, it should only be taken as approved by a doctor, especially when administered to babies and children.

What it's used for

Simethicone is prescribed for the relief of symptoms like:

Abdominal discomfort and cramping
Frequent burping
Excessive gas
Excessive stomach noises
Abdominal bloating

Simethicone can also be indicated as a form of bowel prep to remove gas from the digestive tract prior to certain exams, like an endoscopy or colonoscopy.

What is the difference between dimethicone and simethicone?

Both dimethicone and simethicone can be prescribed for the treatment of intestinal gas.

However, dimethicone can also be used in some sunscreen or body moisturizer formulations, as it forms a protective barrier on the skin. In these cases, it should not be ingested.

How to take

The way to use simethicone varies according to the presentation and includes:

1. Simethicone drops 75mg/mL

Simethicone drops can be used by adults, babies and children. Dosing varies depending on the patient's age:

Children under 2 years old: 3 to 5 drops orally, up to 3 times a day, as directed by the pediatrician;
Children from 2 to 12 years old: 5 to 10 drops orally, up to 3 times a day, as directed by the pediatrician;
Adults and children over 12 years old: 13 drops orally, up to 3 times a day.

When administering this medication to a baby or young child, simethicone can be mixed with water, baby formula or other liquids to facilitate swallowing.

It is important to shake the bottle of drops before use, and to adhere to treatment as outlined by your doctor or pediatrician.

2. Simethicone 40 mg tablets

Simethicone in 40 mg tablets is normally indicated for adults. It is taken orally in doses of 1 to 3 tablets up to three times a day after meals, or as directed by a doctor.

The maximum daily dose should not exceed 500 mg.

3. Simethicone capsules 125 mg

Simethicone in 125 mg gelatin capsules are recommended only for adults. They are taken in doses of one capsule every 6 hours, preferably after meals or before bed.

The maximum daily dose four 125 mg capsules.

Possible side effects

Simethicone is generally well tolerated because it is not absorbed by the body. It works only on the gases present in the stomach or gut, and is completely eliminated through the stool.

However, some side effects that may occur with simethicone using include hives, itching, swelling and skin redness.

Simethicone can cause an allergic reaction that requires immediate medical attention. Therefore, if you experience symptoms like difficulty breathing, coughing, chest pain, a swollen throat, hives, or swelling in the mouth, tongue or face, stop treatment immediately and proceed to the nearest emergency room.

Contraindications for use

Simethicone should not be used by anyone who is allergic to simethicone or by anyone with a history of a bowel perforation or obstruction.

This medication should only be used during pregnancy or breastfeeding if approved and monitored by a doctor.

Simethicone drops solution may contain phenylalanine and should not be used by people with phenylketonuria.