Drug interactions
Penicillin g + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Penicillin g and Sodium picosulfate / magnesium oxide / anhydrous citric acid: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Sodium picosulfate requires conversion to its active form by colonic bacteria, and antibiotics that disrupt this flora may reduce bowel cleansing. Parenteral penicillin G has limited colonic exposure, so the effect is uncertain but plausible.
What this interaction means in plain words
Penicillin g and Sodium picosulfate / magnesium oxide / anhydrous citric acid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Antibiotic suppression of colonic bacteria needed to activate picosulfate.
What to do
Avoid giving antibiotics before bowel preparation where possible, and confirm adequate cleansing before colonoscopy.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Penicillin g
- Amifampridine + Penicillin g Moderate
- Amiloride + Penicillin g Moderate
- Bcg vaccine live + Penicillin g Moderate
- Cholera vaccine + Penicillin g Moderate
- Colestipol + Penicillin g Moderate
- Deflazacort + Penicillin g Moderate
Frequently asked questions
Can I take Penicillin g with Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Penicillin g and Sodium picosulfate / magnesium oxide / anhydrous citric acid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Sodium picosulfate requires conversion to its active form by colonic bacteria, and antibiotics that disrupt this flora may reduce bowel cleansing. Parenteral penicillin G has limited colonic exposure, so the effect is uncertain but plausible.
How serious is the interaction between Penicillin g and Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid giving antibiotics before bowel preparation where possible, and confirm adequate cleansing before colonoscopy.
What other medicines interact with Penicillin g?
MediHelp also lists interactions of Penicillin g with, for example, Amifampridine, Amiloride, Bcg vaccine live. The full list is on the Penicillin g page.
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