Important Medication Guide: What to Do if You Miss a Scheduled ERT Dose

Enzyme replacement therapy (ERT) with asfotase alfa is a life-changing treatment for hypophosphatasia. Sticking to your prescribed schedule helps maintain bone health, reduce pain, and improve mobility. Yet life happens, and you may occasionally miss a dose. This guide explains exactly what to do if you miss a scheduled asfotase alfa injection, without causing unnecessary worry. It draws on official prescribing information and expert recommendations.

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Why Adherence Matters

• Consistent blood levels: Regular dosing keeps enzyme levels steady, supporting normal bone mineralization.
• Symptom control: Missing doses can lead to pain, fatigue, or muscle weakness.
• Long-term outcomes: Staying on schedule maximizes benefits and slows disease progression.

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General Principles for Missed Doses

Although individual recommendations may vary slightly by country or clinical situation, most guidelines agree:

1. Act promptly: The sooner you address a missed dose, the better.
2. Do not double up: Never take two doses at once to “catch up.”
3. Return to schedule: After handling the missed dose, continue with your next regularly planned injection.

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Asfotase Alfa Missed Dose Protocol

Follow these steps if you miss an asfotase alfa injection:

1. Less than 12 hours late

   • Administer the missed dose as soon as you remember.
   • Continue with your next regular dose at the scheduled time.

2. More than 12 hours late

   • Skip the missed dose—do not give a double dose.
   • Resume your normal injection schedule at the next planned time.

3. Very close to your next dose time

   • If it’s within a few hours of your next planned dose, skip the missed injection.
   • Continue with your routine dosing schedule.

4. Multiple missed doses

   • Contact your healthcare provider for personalized guidance.
   • You may need to adjust the timing of upcoming injections under medical supervision.

5. Travel or supply issues

   • Plan ahead: carry extra medication and supplies when traveling.
   • If you lose or run out of medication, reach out to your pharmacy or doctor immediately to avoid gaps in therapy.

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Tips to Prevent Missed Doses

• Set reminders: Use phone alarms, calendars, or apps dedicated to medication tracking.
• Keep supplies handy: Store medication, syringes, and accessories in a designated kit.
• Coordinate with caregivers: If others help administer your injection, confirm schedules with them.
• Plan for disruptions: Have a small travel kit and check expiration dates regularly.

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What to Watch For After a Missed Dose

Missing a single dose rarely causes a medical emergency, but be alert for:

• Increased bone or joint pain
• General fatigue or muscle weakness
• Localized swelling or discomfort at previous injection sites

If any symptoms worsen or new, concerning signs appear, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.

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When to Contact a Healthcare Provider

Reach out immediately if you experience:

• Severe bone pain that limits movement
• Sudden changes in muscle strength or coordination
• Signs of allergic reaction: rash, itching, swelling of face or throat, difficulty breathing
• Any other symptom you find alarming

Always discuss missed doses at your next appointment. Your doctor may need to adjust your monitoring plan or dosing schedule.

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Do Not “Self-Manage” Serious Concerns

While minor delays can be handled at home, never ignore life-threatening signs. If you suspect severe complications, seek medical care without delay.

Speak to a doctor about anything that could be life-threatening or serious. Proper medical evaluation and guidance are crucial.

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Key Takeaways

• If you’re under 12 hours late, give the missed asfotase alfa dose right away.
• If you’re over 12 hours late, skip that dose—do not double up.
• Always return to your original dosing schedule.
• Use reminders, travel kits, and caregiver support to stay on track.
• Monitor for increased pain or weakness, and consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.
• Contact your healthcare provider for severe symptoms or multiple missed doses.

Staying informed and prepared can make all the difference in managing your ERT. By following this protocol, you’ll minimize disruptions and continue to get the most out of your asfotase alfa therapy. Remember, no guide replaces personal medical advice—always check with your healthcare team for recommendations tailored to your situation.