Category- Allopathy
About Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane
This suspension consists of the following ingredients like dried aluminum hydroxide, magnesium hydroxide, activated methyl polysiloxane syrup is an antacid and anti-flatulent medicine used to relieve acidity, heartburn, indigestion, gas, bloating, and stomach discomfort. It works by neutralizing excess stomach acid, protecting stomach lining, and breaking gas bubbles to reduce bloating and abdominal discomfort. Common side effects include constipation, diarrhea, nausea, and a chalky taste in the mouth.
Take this medicine exactly as prescribed by your doctor. Shake the bottle well before using it. Do not use this medicine if you are allergic to any of its ingredients or have severe kidney disease unless advised by your doctor.
Medicine Highlights
| Uses | 1. To relieve acidity and heartburn 2. To treat indigestion (dyspepsia) 3. To reduce gas and bloating 4. To relieve stomach discomfort caused by excess stomach acid |
| Common Side Effects | 1. Constipation 2. Diarrhea 3. Nausea 4. Chalky taste in the mouth 5. Stomach discomfort |
| Additional Information | Avoid taking other medicines within 2 hours of this syrup unless instructed by your doctor. |
| Storage | 1. The medicine should be stored at room temperature. 2. Keep away from sunlight and moisture. 3. Keep away from the reach of children. |
| How to Take This Medicine | Take this medicine orally with the measuring spoon or the cup |
Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane Uses
Dried Aluminium Hydroxide + Magnesium Hydroxide + Activated Methyl Polysiloxane Syrup is used to treat the following conditions:
- Acidity and Heartburn
- Indigestion (dyspepsia)
- Gas and bloating
- Acid reflux-related stomach discomfort
Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane side effects
More Common
- Constipation
- Diarrhea
- Nausea
- Chalky taste
- Stomach discomfort
Less Common
- Vomiting
- Abdominal cramps
- Allergic skin rash
- High magnesium or aluminium levels (mainly in patients with kidney disease)
How Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane works
This antacid syrup is commonly used to relieve acidity, heartburn, indigestion, and excess gas. Dried Aluminium Hydroxide neutralizes excess stomach acid and helps protect the stomach lining. Magnesium Hydroxide reduces stomach acidity quickly and provides relief from heartburn and indigestion. Activated Methyl Polysiloxane (Simethicone) breaks down gas bubbles in the stomach and intestines, making it easier for gas to pass and relieve bloating and discomfort.
Safety Measures and Warning
Allergy or Hypersensitivity
Do not use this medicine if you are allergic to dried aluminium hydroxide, magnesium hydroxide, activated methyl polysiloxane, or any of its ingredients, as it may cause serious allergic reactions.
Gastrointestinal Disorders
If you have intestinal blockage, severe constipation, severe stomach pain, or other digestive disorders, inform your doctor before taking this medicine, as it may worsen these conditions or delay the diagnosis of a serious underlying problem.
Kidney Problems
If you have kidney disease, inform your doctor before taking this medicine because aluminium and magnesium may build up in the body, increasing the risk of side effects.
Pregnancy
Use this medicine during pregnancy only if prescribed by your doctor. Your doctor will decide whether the benefits outweigh any potential risks.
Breastfeeding
Consult your doctor before using this medicine while breastfeeding, as they will determine whether it is safe for you and your baby.
Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane Interaction with Food Product
No significant food interactions are known. However, avoid consuming excessive alcohol, spicy foods, and acidic beverages if you have frequent acidity or heartburn, as these may worsen symptoms.
Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane Interaction with Other Medicines
Avoid taking Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:
Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane Chemical Structure
IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name
Aluminium hydroxide: aluminum trihydroxide

Magnesium hydroxide: magnesium dihydroxide

Methyl polysiloxane: hydroxy(dimethyl)silane;hydroxy(trimethyl)silane;tetramethylsilane

Intake routine/cycle
Daily dose
Take Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.
Missed Dose
If you forget to take Dried Aluminium Hydroxide, Magnesium Hydroxide and Activated Methyl Polysiloxane, take the medication soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.
Overdose
An overdose may cause constipation, diarrhea, stomach discomfort, high magnesium or aluminium levels (especially in patients with kidney disease), and electrolyte imbalance. Seek immediate medical attention if an overdose is suspected.
Storage
- Store the medicine at room temperature.
- Keep away from sunlight and moisture.
- Keep out of reach of children
Directions for use
- Shake the bottle well before use.
- Measure the prescribed dose using a measuring cup or spoon.
- Take it by mouth after meals or as directed by your doctor.
- Follow the prescribed dose and duration.
- Do not exceed the recommended dose.
FAQ’s
What are the uses of antacid syrup?
Antacid syrup is used to relieve acidity, heartburn, indigestion, acid reflux, gas, bloating, and stomach discomfort caused by excess stomach acid.
When is the best time to take antacid syrup?
Antacid syrup is usually taken after meals and at bedtime, or as directed by your doctor. Follow your doctor’s instructions for the best results.
Is antacid syrup safe during pregnancy?
Antacid syrup may be used during pregnancy if recommended by your doctor. Do not take it without medical advice, especially during the first trimester.
What are the side effects of antacid syrup?
Common side effects of antacid syrup include constipation, diarrhea, nausea, a chalky taste in the mouth, and mild stomach discomfort. These side effects are usually temporary. If they persist or worsen, consult your doctor.
Reference
- PubChem. Aluminum hydroxide [Internet]. pubchem.ncbi.nlm.nih.gov. Available from
- PubChem. Magnesium hydroxide [Internet]. pubchem.ncbi.nlm.nih.gov. Available from
- PubChem. Methyl hydrogen polysiloxane [Internet]. Nih.gov. PubChem; 2026 [cited 2026 Jul 2]. Available from
- Salisbury B, Terrell JM. Antacids [Internet]. Nih.gov. StatPearls Publishing; 2023. Available from
- Antacid regular strength (suspension) CVS Pharmacy [Internet]. Drugs.com. 2026 [cited 2026 Jul 2]. Available from
- NHS website. Antacids [Internet]. nhs.uk. 2017. Available from

Pranathi is a final year Pharm D student at Chalapathi Institute of Pharmaceutical Sciences. She loves learning and applying her knowledge in pharmacy and has a passion for writing, which allows her to express ideas clearly and creatively. She enjoys combining her technical skills with her love for writing and communication to make a meaningful impact. Currently she is working on a research paper about “Consanguineous marriages and its impact on children’s health” which will be published by the end of 2025.