Prospect: information for the patient

Jinarc 15 mg tablets

Jinarc 30 mg tablets

Jinarc 45 mg tablets

Jinarc 60 mg tablets

Jinarc 90 mg tablets

Tolvaptan

This medicine is subject to additional monitoring, which will speed up the detection of new information about its safety. You can contribute by reporting any adverse effects you may experience. The final part of section 4 includes information on how to report these adverse effects.

Read this prospect carefully before starting to take this medicine, because

it contains important information for you.

• Keep this prospect, as you may need to read it again.
• If you have any doubts, consult your doctor or pharmacist.
• This medicine has been prescribed only for you, and you must not give it to other people
• who may have the same symptoms as you, as it may harm them.
• If you experience adverse effects, consult your doctor or pharmacist even if they are
• adverse effects that do not appear in this prospect. See section 4.

Jinarc is a medication used to treat a disease known as «autosomal dominant polycystic kidney disease» (ADPKD). This disease leads to the development of fluid-filled cysts in the kidneys, causing pressure on surrounding tissues and reducing kidney function, potentially leading to kidney failure. Jinarc is used to treat ADPKD in adults with chronic kidney disease (CKD) in stages 1 to 4 with signs of rapid disease progression.

The active ingredient of Jinarc is tolvaptan, which blocks the effect of vasopressin, a hormone involved in the formation of cysts in the kidneys of patients with ADPKD. By blocking the effect of vasopressin, Jinarc slows the development of kidney cysts in patients with ADPKD, reduces disease symptoms, and increases urine production.

Do not take Jinarc:

• If you are allergic to tolvaptan or any of the other components of this medication (listed in section 6) or if you are allergic to benzazepine or benzazepine derivatives (for example, benazepril, conivaptan, mesilato de fenoldopam, or mirtazapina).

• If you have been told that you have high levels of liver enzymes in your blood and this prevents you from receiving treatment with tolvaptan.
• If your kidneys do not function (no urine production)
• If you have a condition associated with very low blood volume (e.g., severe dehydration or hemorrhage).
• • If you have a condition that increases the amount of sodium in your blood.
  • If you do not feel the sensation of thirst.
  • If you are pregnant (see "Pregnancy and breastfeeding").
  • If you are breastfeeding (see "Pregnancy and breastfeeding").

Warnings and precautions

Consult your doctor before starting to take Jinarc:

• If you cannot drink enough water (see "Drink a sufficient amount of water" below) or if you have to limit your liquid intake.
• • If you have difficulty urinating or prostatic hypertrophy (enlargement of the prostate).
  • If you have a blood sodium level that is too high or too low.
• If you have had a past allergic reaction to benzazepine, tolvaptan, or other benzazepine derivatives (e.g., benazepril, conivaptan, mesilato de fenoldopam, or mirtazapina), or to any of the other components of this medication (listed in section 6).
• • If you have diabetes.
  • If you have been told that you have high levels of uric acid in your blood (which may have caused gout).
• Inform your doctor immediately if you experience signs that may indicate liver problems, such as:

During treatment with Jinarc, your doctor will request monthly blood tests to monitor changes in your liver function.

Drink a sufficient amount of water

Jinarc causes water loss because it increases urine production. This water loss may lead to adverse effects such as dry mouth and thirst, or even more serious adverse effects such as kidney problems (see section 4). Therefore, it is essential that you have access to water and can ingest sufficient amounts of liquid when you feel thirsty. Before going to bed, you should drink one or two glasses of water even if you do not feel thirsty, and also drink water after urinating at night. You should be especially careful if you have a disease that reduces your ability to ingest adequate liquids or if you have a higher risk of dehydration, for example, if you have vomiting or diarrhea. Due to the increased urine production, it is also essential to have a bathroom nearby at all times.

Children and adolescents

Jinarc has not been studied in children and adolescents (under 18 years) and is therefore not recommended for use in this population.

Other medications and Jinarc

Inform your doctor or pharmacist if you are taking, have taken recently, or may need to take any other medication, including over-the-counter medications.

Particularly, inform your doctor that you are taking:

• Treatments containing ketoconazole for fungal infections (fungal infections), macrolide antibiotics such as clarithromycin, or diltiazem for hypertension and chest pain.
• These medications may increase the effects of Jinarc.
• Medications that increase the level of sodium in the blood or that contain large amounts of salt, such as tablets that dissolve in water and those used to treat indigestion. These may increase the effects of Jinarc.
• Digoxin (a medication for treating irregular heart rhythm and heart failure), dabigatran (used as an anticoagulant), rosuvastatin or pitavastatin (used to reduce blood cholesterol levels), methotrexate (used to treat cancer and arthritis), ciprofloxacin (an antibiotic), sulfasalazine (for the treatment of irritable bowel disease or rheumatoid arthritis), or metformin (for the treatment of diabetes). Jinarc may increase the effect of these medications.
• Phenytoin or carbamazepine (medications for treating epilepsy), rifampicin (a medication for treating tuberculosis), or St. John's Wort (a traditional herbal remedy for mild depression and anxiety). It is advisable to avoid the use of any of these medications in combination with Jinarc because they may reduce the effects of Jinarc.
• Diuretics (used to increase urine production). When taken at the same time as Jinarc, these medications may increase the risk of adverse effects due to water loss.
• Diuretics or other medications for treating hypertension. When taken at the same time as Jinarc, these medications may increase the risk of experiencing low blood pressure when standing up or getting up.
• Desmopressin (used to increase blood clotting factors or to control urine production or urinary incontinence). Jinarc may reduce the effect of desmopressin.

It may not be a problem to take these medications at the same time as Jinarc. Your doctor will decide what is best for you.

Use of Jinarc with beverages and alcohol

Do not take orange juice while taking Jinarc.

Pregnancy and breastfeeding

Do nottake this medication if you are pregnant or breastfeeding.

Potentially fertile women should use reliable contraceptive methods while being treated with this medication.

If you are pregnant or breastfeeding, or if you think you may be pregnant or plan to become pregnant, consult your doctor or pharmacist before taking this medication.

Driving and operating machinery

Some people may feel dizzy, weak, or tired after taking Jinarc. If you experience these effects, do not drive or use tools or machines.

Jinarc contains lactose.

If your doctor has told you that you have a lactose intolerance, consult with them before taking this medication.

Only specialized doctors in the treatment of PQRAD can prescribe Jinarc. Follow exactly the administration instructions of this medication indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.

Dose

The daily dose of Jinarc should be divided into two doses, one higher than the other. The higher dose should be taken in the morning when waking up, at least 30 minutes before breakfast, while the lower dose should be taken 8 hours later.

The dose combinations are:

45 mg + 15 mg

60 mg + 30 mg

90 mg + 30 mg

Normally, your treatment will start with a dose of 45 mg in the morning and 15 mg 8 hours later. Your doctor may gradually increase your dose to a maximum combination of 90 mg in the morning and 30 mg 8 hours later. Your doctor will regularly check how you tolerate the prescribed dose to determine the best dose for you. Always take the highest tolerable dose combination prescribed by your doctor.

If you are taking other medications that may increase the effects of Jinarc, you may receive lower doses. In this case, your doctor may prescribe Jinarc tablets with 30 or 15 mg of tolvaptan, which you should take once a day in the morning.

Administration form

Swallow the tablets without chewing and with a glass of water.

The morning dose should be taken at least 30 minutes before breakfast. The second daily dose can be taken with or without food.

If you take more Jinarc than you should

In case you have taken more tablets than the prescribed dose,drink plenty of water and immediately contact your doctor or the nearest hospital.Remember to bring the medication package with you so it is clear what you have taken. If you take the higher dose too late, you may have to go to the bathroom more frequently at night.

If you forget to take Jinarc

If you forget to take your medication, take the dose as soon as you remember on the same day. If you have not taken the tablets for a day, take the normal dose the next day.Do not take a double dose to compensate for the missed individual doses.

If you interrupt the treatment with Jinarc

If you interrupt the treatment with Jinarc, the kidney cysts may grow as fast as before starting the treatment with this medication. Therefore, you should only stop taking Jinarc if you notice emergency medical attention required side effects (see section 4) or if your doctor tells you to.

If you have any doubts about the use of this medication, consult your doctor or pharmacist.

Like all medicines, this medicine may cause side effects, although not everyone will experience them.

Severe side effects:

If you experience any of the following side effects, you may need urgent medical attention. Stop taking Jinarc and contact a doctor immediately or go to the nearest hospital if:

• You have difficulty urinating;

• You experience facial, lip, or tongue swelling, itching, a generalised skin rash, or wheezing or difficulty breathing (symptoms of an allergic reaction).

Jinarc may cause your liver not to function properly.

Consult your doctor if you experience symptoms of nausea, vomiting, fever, fatigue, loss of appetite, abdominal pain, dark urine, jaundice (yellowing of the skin or eyes), skin itching, or joint and muscle pain with fever.

Other side effects:

Very common: may affect more than 1 in 10 people

Common: may affect up to 1 in 10 people

• Heartburn
• Abnormal liver function
• Skin rash
• Itching
• Muscle spasms
• General weakness
• Elevated liver enzyme levels in the blood
• Weight loss

• Elevated bilirubin levels (a substance that can cause yellowing of the skin or eyes) in the blood

• Allergic reactions (see above)
• Acute liver failure (ALF)