Drug interactions
Doxycycline + Pivmecillinam
Severity: Moderate
Doxycycline and Pivmecillinam: 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
A bacteriostatic tetracycline may reduce the bactericidal activity of the beta-lactam mecillinam. The clinical relevance is uncertain and mainly applies to severe infections.
What this interaction means in plain words
Doxycycline and Pivmecillinam 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.
Doxycycline belongs to Anti Bacterial; Pivmecillinam belongs to Anti Bacterial.
Why it happens
Pharmacodynamic antagonism: inhibition of bacterial growth reduces beta-lactam killing.
What to do
Avoid combining them unless clearly needed; use a single agent chosen by susceptibility for urinary infections.
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 Doxycycline
- Acitretin + Doxycycline Contraindicated
- Aminolevulinic acid + Doxycycline Major
- Cholera vaccine + Doxycycline Major
- Doxycycline + Isotretinoin Major
- Doxycycline + Methoxyflurane Major
- Doxycycline + Microbiota Major
Other interactions of Pivmecillinam
Frequently asked questions
Can I take Doxycycline with Pivmecillinam?
MediHelp rates the interaction as moderate. Doxycycline and Pivmecillinam 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. A bacteriostatic tetracycline may reduce the bactericidal activity of the beta-lactam mecillinam. The clinical relevance is uncertain and mainly applies to severe infections.
How serious is the interaction between Doxycycline and Pivmecillinam?
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 combining them unless clearly needed; use a single agent chosen by susceptibility for urinary infections.
What other medicines interact with Doxycycline?
MediHelp also lists interactions of Doxycycline with, for example, Acitretin, Aminolevulinic acid, Cholera vaccine. The full list is on the Doxycycline page.
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