Lære Checking for Drug Interactions | Dosage Calculations and Patient Safety

Understanding potential drug-drug interactions is a critical aspect of patient safety in pharmacy practice. When multiple medications are prescribed to a patient, certain combinations can cause harmful effects, reduce therapeutic efficacy, or increase the risk of adverse events. Automated checks using Python help you efficiently identify these risks, supporting safer prescribing and dispensing decisions.


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# Dictionary mapping drug pairs (as tuples) to interaction warnings
drug_interactions = {
    ("warfarin", "aspirin"): "Increased risk of bleeding.",
    ("lisinopril", "potassium chloride"): "Risk of hyperkalemia.",
    ("simvastatin", "clarithromycin"): "Increased risk of muscle toxicity.",
    ("metformin", "cimetidine"): "May increase metformin levels; risk of lactic acidosis."
}

def check_interactions(med_list):
    interactions_found = []
    # Check all unique pairs in the medication list
    for i in range(len(med_list)):
        for j in range(i + 1, len(med_list)):
            pair = (med_list[i].lower(), med_list[j].lower())
            reverse_pair = (med_list[j].lower(), med_list[i].lower())
            # Check both possible orderings
            if pair in drug_interactions:
                interactions_found.append((pair, drug_interactions[pair]))
            elif reverse_pair in drug_interactions:
                interactions_found.append((reverse_pair, drug_interactions[reverse_pair]))
    return interactions_found

The check_interactions function loops through every possible pair of medications in a patient's list. For each pair, it checks if the combination exists in the drug_interactions dictionary, accounting for both possible orderings of the drugs. If a known interaction is found, the function records the pair and the associated warning. This systematic approach ensures that no potential interaction is missed, regardless of the order in which medications are listed.


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# Example medication list for a patient
patient_meds = ["Warfarin", "Aspirin", "Metformin"]

# Check for interactions
results = check_interactions(patient_meds)

# Output any interactions found
if results:
    for pair, warning in results:
        print(f"Interaction between {pair[0].title()} and {pair[1].title()}: {warning}")
else:
    print("No known interactions found.")

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Sektion 2. Kapitel 2

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Suggested prompts:

Can you explain how to add more drug interactions to the dictionary?

What should I do if a medication is not found in the interaction list?

How can I check interactions for a different list of medications?

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# Dictionary mapping drug pairs (as tuples) to interaction warnings
drug_interactions = {
    ("warfarin", "aspirin"): "Increased risk of bleeding.",
    ("lisinopril", "potassium chloride"): "Risk of hyperkalemia.",
    ("simvastatin", "clarithromycin"): "Increased risk of muscle toxicity.",
    ("metformin", "cimetidine"): "May increase metformin levels; risk of lactic acidosis."
}

def check_interactions(med_list):
    interactions_found = []
    # Check all unique pairs in the medication list
    for i in range(len(med_list)):
        for j in range(i + 1, len(med_list)):
            pair = (med_list[i].lower(), med_list[j].lower())
            reverse_pair = (med_list[j].lower(), med_list[i].lower())
            # Check both possible orderings
            if pair in drug_interactions:
                interactions_found.append((pair, drug_interactions[pair]))
            elif reverse_pair in drug_interactions:
                interactions_found.append((reverse_pair, drug_interactions[reverse_pair]))
    return interactions_found


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# Example medication list for a patient
patient_meds = ["Warfarin", "Aspirin", "Metformin"]

# Check for interactions
results = check_interactions(patient_meds)

# Output any interactions found
if results:
    for pair, warning in results:
        print(f"Interaction between {pair[0].title()} and {pair[1].title()}: {warning}")
else:
    print("No known interactions found.")

Var alt klart?

Tak for dine kommentarer!

Sektion 2. Kapitel 2

Checking for Drug Interactions

1. Which data structure is suitable for storing known drug interactions?

2. Why is it important to check all pairs of medications in a patient's list?

3. How can Python functions improve the reliability of interaction checks?

Checking for Drug Interactions

1. Which data structure is suitable for storing known drug interactions?

2. Why is it important to check all pairs of medications in a patient's list?

3. How can Python functions improve the reliability of interaction checks?