Prometrium with antacids and acid blockers
Antacids and acid-blocking medications (PPIs like omeprazole, H2 blockers like ranitidine or famotidine) are widely used and can subtly affect the absorption of medications taken alongside them. For Prometrium (Progesterone) at 100mg, 200mg, the impact depends on how Progesterone is absorbed and whether gastric pH plays a role.
How antacids affect Prometrium
Antacids work locally to neutralise gastric acid; PPIs and H2 blockers reduce acid secretion over hours. Some medications need an acidic stomach for proper dissolution and absorption — for these, co-administration with PPIs reduces effective dose. Other medications absorb fine regardless of pH. Whether Progesterone is pH-sensitive is in the prescribing information. Progesterone in Prometrium binds to progesterone receptors and modulates gene expression in reproductive and other tissues.
Practical guidance
According to general pharmacy practice, separating antacid doses from Prometrium by 2 hours avoids most direct binding interactions. PPIs and H2 blockers, taken on their own schedule, do not need timing separation but can shift Progesterone absorption over weeks of co-use. The pharmacist confirms whether Prometrium at 100mg, 200mg is affected.
Frequently asked questions
Can I take antacids with Prometrium? ▾
Yes for most users, but separating the doses by 2 hours minimises any direct interaction with Progesterone at 100mg, 200mg. Some medications bind to antacid components and absorb less effectively if taken simultaneously.
Will my PPI affect Prometrium? ▾
For most Hormones and Birth Control medications, no clinically meaningful interaction. For pH-sensitive active ingredients, chronic PPI use can reduce absorption of Prometrium; the prescriber may consider an alternative or a dose adjustment if this applies to Progesterone.
More on Prometrium
- With alcoholPrometrium and alcohol — is it safe to drink?
- With foodShould Prometrium be taken with food?
- Side effectsPrometrium side effects: common, rare and warning signs
- Dosage guidePrometrium dosage guide: how much to take and when
- OnsetHow fast does Prometrium start working?
- DurationHow long does Prometrium last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.