The days supply calculation is one you will be making for each and every prescription you fill as a pharmacy technician.

In most cases, “Days Supply” is calculated by dividing the maximum amount of the medication used in 1 day by the dispensed amount.

**“Days Supply”** means just what it sounds like: it is how many days the supply of dispensed medication will last.

Here are a couple of examples:

Motrin (ibuprofen) 800mg, 1 tablet 3 times daily as needed, #30.

Days supply takes the maximum amount the patient could take in 1 day, in this case 3 tablets, divided into the amount dispensed of 30 pills-

30/3=**10 days supply.**

**Example #2**

Toradol (ketorolac) 10mg, 1 tablet every 4-6 hours as needed, not more than 4 per day. #80.

Quantity of pills: 80 divided by 4 (maximum amount per day) =
**20 days supply.**

Celexa (citalopram) 40mg, 1 tablet daily, #30.

30/1=**30 days supply.**

These previous examples seem straightforward, but it gets a bit more complicated when you are dealing with other types of prescriptions.

Calculating Ear Drop and **Eye Drop Days Supply** are different than the example problems above.

Usually with ear and eye drops, 1ml (1 milliliter) will have 15 drops of medication.

Time for another example.

**Example #4**

Tobramycin Eye Suspension, 1 drop into each eye 3 times daily, 5ml bottle.

1 drop into each eye=2 drops X 3 times daily = 6 drops per day.

5ml X 15 drops per mL = 75 drops total.

75 drops / 6 drops per day = 12.5

**Note:** In this case the days supply is not a round number. Most pharmacy computer systems are unable to take a decimal number like 12.5. In this case you should round the number down to the nearest round number. So the answer to this example would be **12 days supply.**

**Topicals: Creams, and Ointments, Gels, **

These dosage forms require the pharmacy tech to calculate days supply using Fingertip Units. One fingertip unit = quantity of topical ointment/cream that when squeezed from a tube, reaches from the tip of an adult finger to the distal, or first crease of the index finger. One FTU is approximately 0.5g of the product.

**Liquids: Solutions, Suspensions, Syrups**

Example #5

Robutussin AC Syrup:

Take 1 Teaspoonful Every 6 Hours As Needed for Cough, 4oz.

In this example, you need to be able to convert Ounces (the American Standard System of Measurement) to Milliliters (the Metric System of Measurement.)There are 30 ML in 1 Oz., so 4 Oz = 120 ML. There are 5ML’s in 1 Teaspoonful.

The maximum the patient could take in one day is 5ML times 4 (24 hours in 1 day, divided by 6 = 4) = 20ml used in one day. 120ML divided by 20ML = **6 Days Supply**

Hopefully these examples have helped you to understand how to calculate days supply.

Scroll down to ask YOUR question about days supply and/or to see all of the answered questions BELOW...

Have you got a Days Supply question that you just can't figure out? Submit your question below and/or scroll down for all questions and answers.

Click below to see contributions from other visitors to this page...

**Help! Alendronate 70mg 1 tablet every week**

Take 1 Alendronate 70mg tablet by mouth every week, 4 tablets is dispensed so what is the Days Supply?

**I got thirty pills for Vicodin 7.5 my dr wants me to take half a pill in the morning and whole pill at night how long should that last me**

I got 30 Vicodin I have to take a half of pill in the morning and whole pill at night how long should my script last me

**Diphenhydramine 25mg tablets Days Supply 2 tabs po qid #40**

BENADRYL (diphenhydramine) 25MG TABLETS
TAKE 2 TABLETS PO QID #40
NEED THE PRACTICE METHOD ON THIS BROKEN DOWN

**1 cap po tid x10/7 days amoxicillin 500mg**

Amoxicillin 500 mg 1cap po tid x 10/7

**I got a 9 day supply is this right**

Take 1 tab by mouth (5mg) daily may increase 5 mg daily do not exceed 30 mg per day. Quantity #30. I got a 9 day supply is this right

**What is day supply take 1 tab on tues and thurs with 30 tabs**

What is day supply if I take 1 tablet on Tuesday and Thursday with a quantity of 30 tabs?

**120 ml liquid hydrocodone: 10ml every 8 Hours; How long will it last?**

How many days does 120 ml of liquid hydrocodone last? It 10 ml every 8 hours..

**When can it be refilled? 35 pills, 3 times a day, so it's not even.**

35 pills, 3 times a day, so it’s not even. When do I refill?

**Bromfenac(bromday) 0.09%**

I am to instill 3 drops into both eyes 3 times a day. Received prescription, of 3 bottles/vials, on 16 Mar 8 and need to know how to figure how long …

**Bromfenac(bromday) 0.09% When can I get a refill?**

I am to instill 3 drops into both eyes 3 times a day. Received prescription, of 3 bottles/vials, on 16 Mar 18 and need to know how to figure how long …

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How to calculate days supply for testosterone injection, 10ml, inject 0.75 ml on every 1st and 15th of the month

**Wondering About How Many Percocet Should be in my Bottle?**

I had a prescription filled for my #120 Percocet on February 18th, how many of the pills should be in my bottle on March 16th? The directions are for me …

**Hydrocodone/Apap - 1 Tablet By Mouth Every 4-6 Hours - Days Supply?**

My doctor prescribed me Vicodin for pain. How many days supply would a pharmacy tech enter for my prescription? The RX was for 48 hydrocodone/apap pills …

**How many tablets would I need for 1 & 1/2 tablets daily for 30 days?**

How many pills should it be if you take 1 and 1/2 pills daily for 30 days?

**SQ Injectable Insulin Days Supply Question: 200 Units/ML**

200units/ ml there's 9mls of insulin and you inject 8 units every day. How many days is it?

**My cough syrup says 3 days supply.10 ml.every 4 hours.I started Thursday,what day can I refill?**

What day can I refill the above 3 days supply?

**Days Supply Question on Lantus Insulin Vials **

What is the day supply for Lantus vials U-100?
Dispense #4 10ml vials
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**250mg/5mL Dispense 200mL Sig: 5mL q.i.d**

How do you set this up to solve to find the days supply?

**How many days will a 12 fl oz bottle last at 1 tablespoon by mouth three times daily?**

How many days will a 12 fl oz bottle of medication last if a patient takes 1 tablespoonful by mouth three times daily?

**How do you figure Days Supply on an Albuterol Nebulizer Solution prescription?**

What is the days supply for Albuterol 2.5ml vials x 25 vials, with a sig of 1 vial via nebulizer qid?

**Days Supply Question: Neurontin 300mg 1 tablet po every other day #15**

Neurontin 300 mg tablets
#15
1 tab po qod
What is the days supply?

**Days Supply/Quantity for Stavudine (Zerit) prescription**

Your pharmacy stocks stavudine in bottles of 30 capsules. How many capsules would you need to dispense for a 90 day supply?

**Days supply Norco 60 pills 1 every six hours as needed**

I have a prescription for Norco, the amount of pills is sixty. I take one every six hours as needed. I filled the prescription on 10/9/17. Today is 11/3/17. …

**What is the days supply on Advair 250/50 #1 1 puff q12h?**

What is the days supply on advair 250/50 #1 - 1 puff q12h?

**Is it still a 20 day supply if “as needed” is written?**

Percocet 5/325, qty: #60, take 1 tablet by mouth 3 times a day as needed for severe pain. Is this a 20 day supply, even though it says, “as needed?” Will …

**Days Supply Question: Amoxicillin 500mg #42 - One cap po every 8 hours**

What is the day supply for the following?
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**Days Supply Question: Norco, #35 pills, 1 tablet every 4-6 hours **

How many days should 35 Norco last me if I was given #35 at 1 every 4-6 hours?

**Days Supply Question - #60 pills: Take 2 & 1/2 tablets daily**

If I had 60 pills on my rx, and I take 2 and 1/2 tablets daily, how long will the prescription last me (day supply)?

**Days Supply Question - 480 ml solution: 15 ml by mouth every 6 hours as needed**

What is the days supply in this question?

**Days Supply Question - Take One Tablet by Mouth Every 4 Hours As Needed for Pain Not To Exceed 6 Per Day**

How many tablets should I be prescribed for a 30-days supply? For Hydrocodone/ Acetaminophen 10mg-325mg? If I was prescribed a smaller amount is the physician …

**How To Figure Out The Days Supply On A TAPER**

David, could you please help me with this TAPER? How do you figure out the Days Supply on it? Maybe I'm making it more complicated than it is, but I don't …

**Days Supply Math Question: How Many Additional Tablets Are Needed? **

10 days supply: dosage 2 tablets 3x per day.
16 tablets per bottle.
How many additional tablets are needed?

**Oxycodone 5mg; #60; 2 tablets po q4-6h prn for pain. What is days supply?**

Oxycodone 5mg, Take 2 tablets by mouth every 4-6 hours as needed for pain.
Quantity=60

**Days Supply Question - #20 pills, 1.5 tablets by mouth daily**

If you have 20 pills and you take 1.5 a days what's the days supply

**90 Capsules: 1 cap twice daily for 1 week then increase**

90 Capsules: 1 cap twice daily for 1 week then increase to 3 capsules twice daily. What is the day supply? How do you figure it out?

**Pharmacy Math Question: How many full bottles (10 pills/bottle) and additional tablets needed to fill this prescription?**

How many full bottles and additional tablets needed?
If days supply needed is 45 and dosage = 1 tab daily, and there are 10 tablets per bottle.
…

**Coumadin 5mg 90 day supply**

Take two Coumadin 5mg every other day for 90 days. What is the quantity for 90 day supply?

**90 xanax a month, 3 a day. When is the earliest I can pick them up? With last month having 31 days**

I get #90 Xanax (generic: alprazolam) a month, with dosing 3 times daily. Last month had 31 days in it. When is the next time I can pick up my refill? …

**What is Days Supply for an RX: take 1/4 tablet every 12 hours, #15 tablets**

How long should they last?

**Pravachol 40mg-How many doses are a 90-Day Supply?**

Mr. Bob Day receives Pravachol 40 mg po daily to lower his cholesterol levels. How many doses would be dispensed for a 90 day supply?

**50 pills: 1 pill by mouth every 6 hours prn. What is days supply?**

50 pills, 1 pill by mouth every 6 hours as needed. How many days will this last?

**Days Supply Question on Norco 10mg/325mg: Take Every 8 Hours**

Take every 8 hours. How many days supply is that?

**Days Supply Question: Norco 7.5 - Take 1-2 tablets Every 4-6 Hours #40**

Written As: Take 1-2 tabs every 4-6 hours, #40. How many days will this prescription last?

**Days Supply Question: 1-2 Capsules every 6-8 hours, #90**

#90. Capsules = 1-2 po every 6-8 hours?

**Days Supply Question: Klonipin (clonazepam) Take 2-3 pills Daily, #68?**

Take 2 to 3 pills daily, # of pills given is 68. What is the days supply?

**Days Supply Question on Testosterone Cypionate Injection-0.5ml every 2 weeks? **

How would you calculate the day supply for 1/2 ml every two weeks?

**What is the day supply of Ferrous Sulfate 75mg/ml drops?**

Take 1.5 ml (22.5mg) by mouth every 12 hours, quantity 50 ml. What is the days supply?

**Days Supply Question - Celebrex 200mg, #25 i po qd**

How do I calculate the number of days supply?

**Days Supply Question for Liquid Medicine: 120ml, 10ml every 8 hours?**

4 ounces = 120ml: Take/Give 10ml every 8 hours. How many days supply is that?

**How do you figure the days supply for a liquid (syrup) medication?**

120ML: 10ml every 8 hours-How many days supply is that?

**Day Supply Question: 3/4 tablet every 6 hours-#35**

3/4 of a tablet every 6 hours with #35 quantity is how many days worth?

**Diphenhydramine Liquid Days Supply Question**

You have received a prescription for diphenhydramine 12.5 mg/5 ml, dispense 240 ml. The patient is to take 50 mg po tid. What is the day's supply for this …

**Cough Syrup: 240ml, Take 10 ml every 4 hours-What is Days Supply?**

If your cough syrup has 240 ml and you take 10ml at a rate of every 4 hours, how soon will it run out? and/or how long would it be until when you are able …

**Days Supply Question with Coumadin (warfarin) half-tabs and whole tabs **

Coumadin: Take one-half tablet on sun, mon, thur, fri, and sat., then take 1 tab tues and wed. Quantity is 90 tabs/ so what would be your days' supply? …

**What is the Days Supply for "1 TSP PO BID", 240ML?**

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Disp: 240ml
What is the days’ supply of this suspension?

**Day Supply: Take 1 tab TID #100**

Take 1 Tablet TID, dispense #100
Refills 2
What is the days supply for insurance?

**Days Supply Question: Do we always round down when after figuring the Days Supply, the answer includes a fraction?**

When the days supply is calculated and the answer is a fraction do I always round down?
Example SIG: Take 1-2 tabs by mouth every 4-6 hours as needed …

**Days Supply on 1/2 Tablet Three Times Weekly, #20?**

How do you find a day supply of a prescription of 1/2 tablet 3 times a week (Monday, Wednesday, and Friday) with a quantity of 20?

**Liquid Motrin/Ibuprofen Days Supply/Dosing Question**

Take 1/4 oz of Motrin 4 times a day for 5 days. There are 6oz in the stock bottle. How many doses are in the bottle?

**Other Ways to Calculate Days Supply And Quantity????**

I have a test tomorrow for a data entry tech but I'm getting confused with it because everyone asks how I got my answer or why I did my calculations this …

**Days Supply Question when Insurance has a 21 day dispensing limitation**

Sig on prescription: take 1 tablet 3 times a day. how do I calculate the maximum quantity allowed if the 3rd party plan has a 21 day dispensing limitation …

**Liquid Days Supply Question: Can You Solve This?**

The directions on a prescription read " 1 tbsp QID, ac and hs." The quantity to be dispensed for a 30 day supply is...

**Victoza Days Supply Question**

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**Norco 40 pills 2 po every 4 hours or 1 po every 6 hours - What is days supply?** Not rated yet

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