Child over 5 years: rarely indicated. When necessary: half a tablet 3 times daily
Adult: 1 to 2 tablets 3 times daily 20 minutes to one hour after meals, or 1 tablet during painful attacks
Duration
According to clinical response
Contra-indications, adverse effects, precautions
Decreases intestinal absorption of many drugs. Do not administer simultaneously with:
atazanavir, chloroquine, digoxin, doxycycline, iron salts, gabapentin, itraconazole, levothyroxine (take at least 2 hours apart).
ciprofloxacin (take ciprofloxacin 2 hours before or 4 hours after antacids), dolutegravir (take dolutegravir 2 hours before or 6 hours after antacids), velpatasvir (take 4 hours apart).
Pregnancy: no contra-indication
Breast-feeding: no contra-indication
Remarks
Chew tablets.
There are numerous preparations of aluminium and/or magnesium hydroxide and different dosages.
Antacids are not included in the WHO list of essential medicines.