How many days does a box of 60 pills of Erdafitinib usually last? How many boxes are needed?

Erdafitinib is an oral FGFR inhibitor, mainly used to treat locally advanced or metastatic urothelial carcinoma carrying FGFR2 or FGFR3 gene mutations. The common recommended starting dose is 8 mg taken orally once daily. If the patient tolerates it well and serum phosphorus levels are within acceptable limits, the doctor may increase the dose to 9 mg per day after 14 days.

The common specifications of erdafitinib are 3mg/ tablets or 4mg/ tablets. The most common specifications on the market are 4mg. A box usually contains 60 capsules, each 4mg, totaling 240mg. If calculated based on the recommended dose of 8 mg per day (i.e. taking 2 4 mg tablets per day), one box can be used for 30 days, which is equivalent to one month's dosage. This was in the context of standard treatment, which was well tolerated by patients without dose adjustments.

If the doctor increases the dose to 9mg per day based on patient monitoring results, you need to take 2 tablets 4mg and < span>1tablet3mg (or other combination), that is, 9mg/day, totaling 270mg/30days. At this time, Erdafitinib with the strength of 60capsules of 4 mg can be taken for approximately 26 to 27 days, depending on whether the patient's actual medication regimen adopts mixed strengths or different packaging.

Since different patients may adjust the dosage based on factors such as blood phosphorus levels, liver and kidney function, etc., the number of days that each box of medicine can be taken varies. For patients with longer maintenance treatment cycles, doctors may prescribe 2 in one go~3box dosage. It is recommended that patients follow the medication plan according to the doctor's prescription and conduct regular blood monitoring to adjust the dosage and determine whether additional medications are needed. Do not change the dosage or frequency of medication on your own to avoid affecting the therapeutic effect or causing adverse reactions.

Reference materials:https://www.drugs.com