What is Firdapse: Uses, Warnings & Interactions

How to take Firdapse

• Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

• The tablets may be divided in half at the score (line at the center) if you need less than a full tablet to get the right dose.

• Ruzurgi®: If your child cannot swallow the tablet or needs to take it using a feeding tube, you may prepare a suspension. Mix three tablets with 30 milliliters (mL) of water in a 30-mL container, then shake the mixture well for 30 seconds. You may give the dose using an oral syringe or feeding tube. Shake the medicine well before giving each dose.

• This medicine should come with a Medication Guide. Ask your pharmacist for a copy if you do not have one.

• Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

• Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

• Store Ruzurgi® tablets at room temperature for up to 3 months. Keep Ruzurgi® suspension in the refrigerator for up to 24 hours. Throw away any unused liquid after 24 hours.

What to do if you miss a dose of Firdapse

Firdapse contraindications

• This medicine is not right for everyone. Do not use it if you had an allergic reaction to amifampridine or similar medicine, or if you have a history of seizures.

Firdapse warnings

• Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease or liver disease.

• This medicine may increase your risk of seizures.

• Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

• Keep all medicine out of the reach of children. Never share your medicine with anyone.

Firdapse interactions

• Some medicines can affect how amifampridine works. Tell your doctor if you are using pyridostigmine or other aminopyridine medicines (including compounded 3,4-diaminopyridine, amifampridine, or 4-aminopyridine).