Drug interactions
Amifampridine + Benzathine penicillin g
Severity: Minor
Amifampridine and Benzathine penicillin g: minor 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
Amifampridine carries a dose-related risk of seizures. Penicillins can lower the seizure threshold, mainly at high doses or with renal impairment, so the combined risk may be higher. Intramuscular depot benzathine penicillin gives low peak levels, so the practical risk is small.
What this interaction means in plain words
Amifampridine and Benzathine penicillin g have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Amifampridine belongs to Central Nervous System; Benzathine penicillin g belongs to Anti Bacterial.
Why it happens
Additive pharmacodynamic lowering of seizure threshold (amifampridine potassium channel blockade plus penicillin GABA-A antagonism).
What to do
No routine change is needed. Monitor for seizure activity, particularly in patients with renal impairment, a seizure history, or when high-dose penicillin is used.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Benzathine penicillin g
- Benzathine penicillin g + Cholera vaccine Moderate
- Benzathine penicillin g + Microbiota Moderate
- Benzathine penicillin g + Omadacycline Moderate
- Benzathine penicillin g + Sodium picosulfate / magnesium oxide / anhydrous citric acid Moderate
- Benzathine penicillin g + Vadadustat Moderate
- Baricitinib + Benzathine penicillin g Minor
Other interactions of Amifampridine
- Amifampridine + Bupropion-naltrexone Major
- Amantadine + Amifampridine Moderate
- Amifampridine + Amitriptyline Moderate
- Amifampridine + Baclofen Moderate
- Amifampridine + Bethanechol Moderate
- Amifampridine + Bromocriptine Moderate
Frequently asked questions
Can I take Amifampridine with Benzathine penicillin g?
MediHelp rates the interaction as minor. Amifampridine and Benzathine penicillin g have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Amifampridine carries a dose-related risk of seizures. Penicillins can lower the seizure threshold, mainly at high doses or with renal impairment, so the combined risk may be higher. Intramuscular depot benzathine penicillin gives low peak levels, so the practical risk is small.
How serious is the interaction between Amifampridine and Benzathine penicillin g?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed. Monitor for seizure activity, particularly in patients with renal impairment, a seizure history, or when high-dose penicillin is used.
What other medicines interact with Benzathine penicillin g?
MediHelp also lists interactions of Benzathine penicillin g with, for example, Cholera vaccine, Microbiota, Omadacycline. The full list is on the Benzathine penicillin g page.
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