tiopronin
Tiopronin (Thiola) works well at preventing cystine kidney stones. You have to drink plenty of water and limit salt and animal protein in your diet to get the maximum results from this medication.
What is Tiopronin (Thiola)?
What is Tiopronin (Thiola) used for?
Prevention of cystine kidney stones
How Tiopronin (Thiola) works
Cystine doesn't dissolve well in your urine. Tiopronin (Thiola) attaches to cystine in your urine and goes through a chemical reaction that makes it dissolve more easily. By lowering the amount of cystine in your urine, tiopronin (Thiola) keeps cystine kidney stones from forming.
Drug Facts
Get your GoodRx coupon
What are the side effects of Tiopronin (Thiola)?
Common Side Effects
- Nausea (12–25%)
- Diarrhea or soft stools (6–18%)
- Canker sores (12–18%)
- Fatigue (14%)
- Rash (12–14%)
- Joint paint (12%)
- Weakness (4–12%)
- Vomiting (10%)
- Protein in your urine (6–10%)
- Fever (8%)
Other Side Effects
- Allergic reactions that can cause fever, rash, joint pain, and swollen lymph nodes
- Loss of appetite (8%)
- Chest pain (6%)
- Swelling (6%)
- Bruising (6%)
- Wrinkly skin (6%)
- Stomach pain (6%)
- Trouble getting an erection (6%)
- Cough (6%)
- Itching (4–6%)
- Low red blood cell count (2–6%)
Source: DailyMed
The following side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- Kidney injury—decrease in the amount of urine, swelling of the ankles, hands, or feet
Side effects that usually do not require medical attention (Report these to your care team if they continue or are bothersome.):
Pros and cons of Tiopronin (Thiola)
Pros
Works well at preventing cystine kidney stones from coming back
Can be mixed with applesauce for people who have trouble swallowing pills or for children
Cons
Taken 3 times per day
To get the most out of tiopronin (Thiola), you’ll need to change your diet and drink more water.
Need to have regular urine tests done
Thiola EC isn't available in a generic form, so it can be more expensive.
Pharmacist tips for Tiopronin (Thiola)
To get the best results from this medication, it's important that you drink plenty of fluids and lower the amount of salt and animal protein in your diet. Try to drink around 4 liters of water per day and limit salt to around 2,300 mg per day.
If you're taking the immediate-release tablets (Thiola), take the medication 1 hour before or 2 hours after a meal.
If you're taking the delayed-release tablets (Thiola EC), it can be taken with or without food, but it's important that you take it the same way consistently either with a meal or on an empty stomach. Also, don't drink alcohol 2 hours before or 3 hours after taking Thiola EC. Alcohol can cause the medication to be released faster in your body, which can raise your risk of side effects.
Swallow the tablet whole. For people who have trouble swallowing pills or for children, tiopronin (Thiola) can be crushed and mixed with applesauce. To mix it in applesauce, crush one tablet in a pill crusher or mortar and pestle. Pour about 1 tablespoon of applesauce into the container that you crushed the tablet in and mix well. It's best to take the applesauce mixture right away after it's mixed, but if that's not possible, the mixture can be stored in the refrigerator for 2 hours maximum after the components were mixed. Toss any mixture that has not been taken within 2 hours. To make sure that you've taken all of the medication, rinse the container with a small amount of water and drink the remaining water.
Frequently asked questions about Tiopronin (Thiola)
How to save using GoodRx
What are the risks and warnings for Tiopronin (Thiola)?
Tiopronin (Thiola) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Protein in your urine
Risk factors: Children taking more than 50 mg/kg bodyweight per day of tiopronin (Thiola)
Tiopronin (Thiola) can cause kidney disorders that can lead to high protein levels in your urine. The risk of this is higher for children who take more than 50 mg/kg bodyweight per day of tiopronin (Thiola). Your healthcare provider will test your urine occasionally in order to watch for protein.
Similarities to d-penicillamine
Risk factors: History of side effects from d-penicillamine
Tiopronin (Thiola) has a similar structure to d-penicillamine (also known as penicillamine), which is a medication used to treat kidney stones, rheumatoid arthritis, and copper buildup in your body. Because of this, your provider might prescribe a lower dose of tiopronin (Thiola) if you've had side effects from d-penicillamine in the past.
Tiopronin (Thiola) dosage forms
| Dosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
| 100mg | 100 tablets | $703.39 | $7.03 |
Typical dosing for Tiopronin (Thiola)
Adults: The typical starting dose is 800 mg by mouth daily, split into 3 separate doses.
Children (weighing 20 kg or more): The typical starting dose is 15 mg/kg bodyweight per day, split into 3 separate doses.
How much does Tiopronin (Thiola) cost?
Tiopronin (Thiola) contraindications
Allergy or sensitivity to tiopronin (Thiola)
Tiopronin (Thiola) images
Get savings updates for Tiopronin (Thiola)
Receive price alerts, news, and other messages from GoodRx about Tiopronin (Thiola) and other healthcare topics and relevant savings offers.By signing up, I agree to GoodRx's Terms and Privacy Policy, and to receive marketing messages from GoodRx.
Browse medications
View AllResearch prescriptions and over-the-counter medications from A to Z, compare drug prices, and start saving.