# Renal Colic (Acute Nephrolithiasis)

- Category: chronic
- Review status: reviewed (every claim checked against a document named on this page)
- Sources: DailyMed Ketoprofen Package Insert (DailyMed, NLM) · DailyMed Tamsulosin Hydrochloride Capsule Package Insert (DailyMed, NLM) · EAU Guidelines on Urolithiasis 2023 · MSF Essential Drugs 2024 - paracetamol (oral) · THIOLA EC (tiopronin) delayed-release tablets US prescribing information, section 1 Indications and Usage, section 2.1 Recommended Dosage, section 2.3 Monitoring and section 5 Warnings and Precautions (DailyMed SetID 20298a52-a194-a161-8632-d84b6f26e23c) · Voltarol Ampoules SmPC (emc, 1043), section 4.2 Posology - renal colic entry · Acute Renal Colic - StatPearls - NCBI Bookshelf (NBK431091) - the article states the dose for this indication · Egyptian National Drug Formulary - Cardiovascular Chapter 2024 (silodosin monograph)
- Verified date: 2026-08

## Verified against

- DailyMed Ketoprofen Package Insert (DailyMed, NLM)
- DailyMed Tamsulosin Hydrochloride Capsule Package Insert (DailyMed, NLM)
- MSF Essential Drugs 2024 - paracetamol (oral)
- Acute Renal Colic - disease-level clinical article (renal-colic-full.txt)
- Renal Colic (Acute Nephrolithiasis) - disease-level clinical article (renal-colic-clinical.txt)
- THIOLA EC (tiopronin) delayed-release tablets US prescribing information, section 1 Indications and Usage, section 2.1 Recommended Dosage, section 2.3 Monitoring and section 5 Warnings and Precautions (DailyMed SetID 20298a52-a194-a161-8632-d84b6f26e23c)

## Treatment metadata

- Ketoprofen — 100 mg — oral.solid
- Referral & safety-netting (no drug therapy)
- Diclofenac — 75 mg — injection
- Tamsulosin — 0.4 mg — oral.solid
- Ondansetron — 4 mg — oral.solid
- Paracetamol — 1000 mg — oral.solid
- Silodosin — 8 mg — oral.solid
- Tiopronin — oral.solid

## Complete treatment card

```text
RENAL COLIC (ACUTE NEPHROLITHIASIS)
Sources: DailyMed Ketoprofen Package Insert (DailyMed, NLM) · DailyMed Tamsulosin Hydrochloride
         Capsule Package Insert (DailyMed, NLM) · EAU Guidelines on Urolithiasis 2023 · MSF
         Essential Drugs 2024 - paracetamol (oral) · THIOLA EC (tiopronin) delayed-release tablets
         US prescribing information, section 1 Indications and Usage, section 2.1 Recommended
         Dosage, section 2.3 Monitoring and section 5 Warnings and Precautions (DailyMed SetID
         20298a52-a194-a161-8632-d84b6f26e23c) · Voltarol Ampoules SmPC (emc, 1043), section 4.2
         Posology - renal colic entry · Acute Renal Colic - StatPearls - NCBI Bookshelf (NBK431091)
         - the article states the dose for this indication · Egyptian National Drug Formulary -
         Cardiovascular Chapter 2024 (silodosin monograph)
Review status: REVIEWED against DailyMed Ketoprofen Package Insert (DailyMed, NLM), DailyMed
               Tamsulosin Hydrochloride Capsule Package Insert (DailyMed, NLM), MSF
               Essential Drugs 2024 - paracetamol (oral), Acute Renal Colic -
               disease-level clinical article (renal-colic-full.txt), Renal Colic
               (Acute Nephrolithiasis) - disease-level clinical article (renal-
               colic-clinical.txt), THIOLA EC (tiopronin) delayed-release tablets
               US prescribing information, section 1 Indications and Usage, section
               2.1 Recommended Dosage, section 2.3 Monitoring and section 5
               Warnings and Precautions (DailyMed SetID
               20298a52-a194-a161-8632-d84b6f26e23c)  (2026-08)

IS IT THIS? - reference only, to read alongside your own examination
  SYMPTOMS - what the patient reports (3)
    - Pain starts suddenly in the flank and radiates down toward the groin or testicle, usually a
      constant ache punctuated by sharp colicky spikes.  [groin pain]
    - Most patients also feel nauseated or vomit, and roughly 85 percent have visible or microscopic
      blood in the urine.  [blood in the urine · nausea]
    - As a stone travels toward the bladder, urinary burning, frequency, urgency, or trouble voiding
      can develop.
  SIGNS - what you find (3)
    - Patients often can't hold still, pacing or writhing from the pain, unlike a surgical abdomen
      where patients tend to lie motionless.
    - Skin can feel cool and sweaty, with tenderness noted over the flank or abdomen.  [sweating]
    - A temperature of 100°F or higher, marked leukocytosis, pus in the urine, low blood pressure,
      or an unexplained fast heart rate should raise concern for urosepsis or obstructive infection,
      particularly in diabetics.  [hypotension · pus · tachycardia]
  TESTS (12)
    - Urinalysis shows visible or microscopic blood in most stone cases; a pH above 7.5 hints at a
      urease-producing infection, while a pH under 5.5 points toward uric acid stones.
    - Not finding blood in the urine does not rule a stone out.
    - A mild rise in white cells, up to about 15,000/µL, is common from the stress response alone
      and doesn't necessarily mean infection.
    - Non-contrast CT is considered the gold standard for a suspected stone, with roughly 98 percent
      sensitivity and 100 percent specificity.
    - CT tends to underestimate the true stone size by roughly 12 percent compared with plain X-ray.
    - Ultrasound, which carries no radiation risk, is the preferred first study when a pregnant
      patient has suspected colic.
    - Plain abdominal X-ray misses roughly 10 to 20 percent of stones because they don't show up on
      film.
    - A resistive index above about 0.7 on renal ultrasound suggests obstruction or intrinsic kidney
      disease.
    - Urosepsis is marked by a heart rate over 90, breathing rate over 20, pus in the urine, and a
      white count above 12,000, along with low blood pressure.
    - A CRP around 50 mg/L or above is a commonly used cutoff for flagging bacterial sepsis.
    - A lactic acid level above 4 mmol/L is considered severe and often points toward sepsis,
      particularly if it's climbing fast.
    - Procalcitonin is thought to beat CRP as a sepsis marker because it's more specific to
      bacterial infection and rises earlier while normalizing faster.
  IF NOT THIS - what else fits (3)
    - Wunderlich syndrome, a rare cause involving spontaneous bleeding under the kidney capsule or
      in the retroperitoneum, is also on the list.
    - Aortic dissection and mesenteric ischemia are both named among the flank-pain mimics of renal
      colic.
    - Ectopic pregnancy and endometriosis are the gynecologic causes listed on this same
      differential.
  Source  StatPearls "Acute Renal Colic" - disease-level clinical article
  Status  traced to the source above

Rx: Main treatment  |  Parenteral NSAID - when the patient cannot keep oral analgesia down  |
    Antiemetic for the vomiting that comes with the colic  |  Alpha-blocker for stone expulsion -
    alternative to tamsulosin  |  Lowers urinary cystine - prevents the NEXT stone in cystinuria,
    not this attack

MAIN TREATMENT - choose one, plus any add-on marked below
1. KETOPROFEN                                             [1st line]
   Adult    The usual dose of Ketoprofen Capsules, USP recommended for mild-to-moderate pain and
            dysmenorrhea is 25 to 50 mg every 6 to 8 hours as necessary.
   Peds     Specialist pediatric emergency referral required
   Source   DailyMed Ketoprofen Package Insert (DailyMed, NLM)
   Why      NSAIDs beat opioids for renal colic - they reduce the ureteric spasm as well as the
            pain.
   Caution  NSAIDs are first-line analgesics for acute renal colic, providing superior efficacy to
            opioids.
            Contraindicated in severe renal failure, active GI ulceration, and late pregnancy.
            Ensure adequate hydration.
   Egypt    MEPACOFEN 100 MG S.R. 20 CAPS.   MEPACO              13.00 EGP (0.65/unit)
            BASKINTA 100 MG 30 CAPS.         ARAB CAPS > S...    31.50 EGP (1.05/unit)
            KETOFAN 100 MG SR 30 CAPS.       AMRIYA              66.00 EGP (2.20/unit)
            PROFENID 1MG/ML SYRUP 100 ML     SANOFI               9.50 EGP
                -> ? strength differs, ? different route - not oral solid
            KETOFAN 12.5MG/5ML 120ML SUSP.   AMRIYA              12.00 EGP
                -> ? strength differs, ? different route - not oral solid

2. REFERRAL & SAFETY-NETTING (NO DRUG THERAPY)            [1st line]
   Adult    
   Source   Acute Renal Colic - disease-level clinical article (renal-colic-full.txt)
   Why      Carries the referral criteria and warning signs for this condition, which apply
            whichever treatment is chosen.
   Caution  RED FLAG - Admit for: sepsis; an infected stone; a stone in a single functioning kidney;
            kidney injury that is severe; urine leaking outside the collecting system; or pain and
            vomiting that will not settle.
            RED FLAG - An infected/obstructed stone (urinary tract infection with obstructing
            ureterolithiasis) is an urgent surgical emergency, not something to manage with oral
            analgesia alone.
            RED FLAG - Antibiotics are needed when there are clinical or laboratory signs of urinary
            infection accompanying the stone.

3. TAMSULOSIN                                             [add-on - not a substitute]
   Adult    0.4 mg once daily after breakfast as medical expulsive therapy (MET) for distal ureteric
            stones <10 mm
   Peds     Specialist pediatric urology use only
   Source   DailyMed Tamsulosin Hydrochloride Capsule Package Insert (DailyMed, NLM)
   Why      Helps a stone in the lower ureter pass. It is not an analgesic and does not replace the
            NSAID.
   Caution  Tamsulosin is used off-label as medical expulsive therapy to facilitate stone expulsion.
            Refer to urology if fever, intractable pain, solitary kidney, or stone >10 mm.
            There is a risk of orthostatic hypotension and retrograde ejaculation.
   Egypt    NORMIRAMA 0.4 MG 30 CAPS.        EGPI > RAMAPH...    60.00 EGP (2.00/unit)
            TAMSUNORM S.R. 0.4MG 30 CAPS.    RAMEDA              60.00 EGP (2.00/unit)
            TAMSULOSIN 0.4 MG 20 CAPS.       GLAXO SMITHKL...    42.00 EGP (2.10/unit)
            CUREPRO XR 0.4 MG 30 CAPS.       DEBEIKY > KHU...   105.00 EGP (3.50/unit)
            BLOCK ALPHA 0.4 MG MR 30 CAPS.   ADWIA              120.00 EGP (4.00/unit)
            FIRAMAZIN 0.4MG 30 H.G.CAPS.     EVA PHARMA          54.00 EGP
            OMNIC 0.4MG 30 MODIFIED RELEASE CAPS. ASTELLAS PHARMA > MULTIPHARMA           147.00 EGP
            OMNIC OCAS 0.4 MG 30 PROLONGED RELEASE F.C.TAB. ASTELLAS PHARMA INC > MU...   282.00 EGP

4. PARACETAMOL                                            [add-on - not a substitute]
   Adult    1000 mg every 6 hours as needed, maximum 4000 mg in 24 hours
   Peds     10-15 mg/kg/dose  [child max 500 mg]
            (Child under 1 month: 10 mg/kg 3 or 4 times daily (max. 40 mg/kg
            daily))
            3kg -> 30-45 mg/dose                    4kg -> 40-60 mg/dose
            5kg -> 50-75 mg/dose                    6kg -> 60-90 mg/dose
            7kg -> 70-105 mg/dose                   8kg -> 80-120 mg/dose
            9kg -> 90-135 mg/dose                   10kg -> 100-150 mg/dose
            11kg -> 110-165 mg/dose                 12kg -> 120-180 mg/dose
            13kg -> 130-195 mg/dose                 14kg -> 140-210 mg/dose
            15kg -> 150-225 mg/dose                 16kg -> 160-240 mg/dose
            17kg -> 170-255 mg/dose                 18kg -> 180-270 mg/dose
            19kg -> 190-285 mg/dose                 20kg -> 200-300 mg/dose
            21kg -> 210-315 mg/dose                 22kg -> 220-330 mg/dose
            23kg -> 230-345 mg/dose                 24kg -> 240-360 mg/dose
            25kg -> 250-375 mg/dose                 26kg -> 260-390 mg/dose
            27kg -> 270-405 mg/dose                 28kg -> 280-420 mg/dose
            29kg -> 290-435 mg/dose                 30kg -> 300-450 mg/dose
            31kg -> 310-465 mg/dose                 32kg -> 320-480 mg/dose
            33kg -> 330-495 mg/dose                 34kg -> 340-500 mg/dose (upper capped)
            35kg -> 350-500 mg/dose (upper capped)  36kg -> 360-500 mg/dose (upper capped)
            37kg -> 370-500 mg/dose (upper capped)  38kg -> 380-500 mg/dose (upper capped)
            39kg -> 390-500 mg/dose (upper capped)  40kg -> 400-500 mg/dose (upper capped)
            41kg -> 410-500 mg/dose (upper capped)  42kg -> 420-500 mg/dose (upper capped)
            43kg -> 430-500 mg/dose (upper capped)  44kg -> 440-500 mg/dose (upper capped)
            45kg -> 450-500 mg/dose (upper capped)  46kg -> 460-500 mg/dose (upper capped)
            47kg -> 470-500 mg/dose (upper capped)  48kg -> 480-500 mg/dose (upper capped)
            49kg -> 490-500 mg/dose (upper capped)  50kg -> 500 mg/dose (capped)
   Source   MSF Essential Drugs 2024 - paracetamol (oral)
   Why      Two jobs. Given alongside ketoprofen it improves the analgesia; given instead of it, it
            is what the patient who cannot have an NSAID gets - renal failure, active ulcer, or late
            pregnancy, all listed on the ketoprofen row above.
   Caution  Weaker than ketoprofen on its own. Where the NSAID is contraindicated this is the best
            available, not an equal substitute, and the pain may need reassessment sooner.
            Reduce the maximum to 3000 mg/day in an adult under 50 kg, malnourished, or with liver
            disease.
            500 mg is the per-dose ceiling used here for a child. 1000 mg is the adult dose and does
            not belong in a weight calculation - the daily 60 mg/kg limit is the one that binds
            first in any case.
   Egypt    PARACETAMOL-ADCO 1 GM 20 TABS.   ARAB DRUG COM...    32.00 EGP (1.60/unit)
            TEMPORAL 1000 MG 20 TABS.        MUP                 40.00 EGP (2.00/unit)
            PARAMOL 1000 MG 20 TABS.         MISR                52.00 EGP (2.60/unit)
            DOLIPRANE 1 GM 20 TABS.          SANOFI              60.00 EGP (3.00/unit)
            GLASBOMOL 1000 MG 20TABLETS      HIGH PERFORMA...    60.00 EGP (3.00/unit)
            DOLIPRANE 1 GM 8 SACHETS         SANOFI              36.00 EGP
            STOPADOL FORTE 1000 MG 10 EFF. SACHETS EVA PHARMA                              60.00 EGP
            AUGICETAMIDE 1000 MG 20 SACHETS  AUG PHARMA          80.00 EGP
            FEBRIMOL ORAL DROPS 20 ML        PHARCO               4.00 EGP
                -> ? strength differs, ? different route - not oral solid
            THERA-LO 3.2G/100ML ORAL SUSP. 100 ML PHAROPHARMA                               5.00 EGP
                -> ? strength differs, ? different route - not oral solid


PARENTERAL NSAID - WHEN THE PATIENT CANNOT KEEP ORAL ANALGESIA DOWN
5. DICLOFENAC                                             [1st line]
   Adult    75 mg as one deep intragluteal IM ampoule; a second ampoule may follow after 30 minutes
            if the pain persists, up to 150 mg in a day - Injections for no more than two days, then
            continue with tablets or suppositories if still needed
   Peds     Not for children - the ampoule is not recommended in the paediatric population.
   Source   Voltarol Ampoules SmPC (emc, 1043), section 4.2 Posology - renal colic entry
   Why      The card's only NSAID is an oral one, and vomiting is part of the presentation. This is
            the injection a Cairo GP gives in the clinic when the patient cannot swallow or keep
            tablets down.
   Caution  Contraindicated in established heart failure, ischaemic heart disease, peripheral
            arterial disease or cerebrovascular disease.
            Contraindicated in renal failure, hepatic failure, active or previous peptic ulcer or GI
            bleeding, and in the last trimester of pregnancy.
            Give it by deep injection into the upper outer quadrant of the buttock; injection-site
            necrosis and nerve damage follow bad technique.
   Egypt    RHEUMAFEN 75MG/3ML 4 AMP. FOR I.M.  INJ. SIGMA TEC > GLAXO SMITHKLINE          12.00 EGP
            POTAFLAM 75MG/3ML 3 AMPS.        KAHIRA              18.00 EGP
            DOLPHIN K 75MG/3ML I.M. 3 AMP.   DELTA PHARMA        24.00 EGP
            ARTICAVOL 75MG/3ML 3 AMP.        GLOBAL PHARMA...    33.00 EGP
            PHAROFEN 75MG 4 AMP.             PHAROPHARMA         44.00 EGP
            DICLAC 75 MG/3ML 5 AMPS.         MINA PHARM > ...    55.00 EGP
            VOLTAREN 75MG/3ML 6 I.M./I.V. INF. AMPS. NOVARTIS                             102.00 EGP
            CATAFLAM 75MG/3ML 6 AMP.         NOVARTIS           120.00 EGP


ANTIEMETIC FOR THE VOMITING THAT COMES WITH THE COLIC - give alongside
6. ONDANSETRON                                            [add-on - not a substitute]
   Adult    4 mg to 8 mg by mouth
   Peds     No paediatric dose for renal colic in the sources opened.
   Source   Acute Renal Colic - StatPearls - NCBI Bookshelf (NBK431091) - the article states the
            dose for this indication
   Why      Nausea and vomiting define the presentation and are why oral analgesia fails; the
            article names ondansetron as the preferred antiemetic here.
   Caution  Avoid it in congenital long QT syndrome, and check an ECG first in patients with
            electrolyte disturbance, heart failure or a slow arrhythmia.
            Do not give it in the first trimester of pregnancy because of a reported risk of oral
            clefts.
   Egypt    DANOFRAN 4MG 5 F.C. TAB.         UP PHARMA           70.00 EGP (14.00/unit)
            SETRONOMET 4 MG 4 ORAL DIS. TABS. AVERROES PHARMA                              78.00 EGP
            IDIVOMTRON 4 MG 10 ORALLY DIS. TABS. INTERNATIONAL DRUG AGENCY (IDI)          144.00 EGP
            EMEREST 4 MG 10 ORO-DISPERSIBLE TABS. GLOBAL PHARMACEUTICAL INDUSTRIES        188.00 EGP
            IDIVOMTRON 4 MG/5ML SYRUP 50 ML  RAMEDA > INTE...   110.00 EGP
                -> ? strength differs, ? different route - not oral solid


ALPHA-BLOCKER FOR STONE EXPULSION - ALTERNATIVE TO TAMSULOSIN - give alongside
7. SILODOSIN                                              [add-on - not a substitute]
   Adult    8 mg once daily with a meal
   Peds     No paediatric dose in the sources opened.
   Source   Egyptian National Drug Formulary - Cardiovascular Chapter 2024 (silodosin monograph) -
            verbatim: "Oral: 8 mg once daily with a meal."
   Why      The card offers tamsulosin for medical expulsive therapy; the article reports silodosin
            beat both tamsulosin and alfuzosin in systematic reviews, so it belongs on the card as
            the stronger option.
   Caution  Contraindicated in severe kidney impairment and in severe liver impairment, and with
            strong CYP3A4 inhibitors such as ketoconazole or itraconazole.
            Warn the patient that loss of seminal fluid on ejaculation is common and harmless.
            Tell any patient awaiting cataract surgery to inform the eye surgeon, because alpha-
            blockers cause floppy iris syndrome.
   Egypt    ELIGODOSIN 8 MG 30 CAPS.         HIKMA PHARMA       105.00 EGP (3.50/unit)
            LIDOFLAK 8 MG 10 CAPS.           MASH PREMIERE...    35.00 EGP (3.50/unit)
            LIDOFLAK 8 MG 30 CAPS.           MASH PREMIERE...   135.00 EGP (4.50/unit)
            SILOPROSTATE 8 MG 30 CAPS.       OCTOBER PHARMA     144.00 EGP (4.80/unit)
            CONGDOSIN 8 MG 20 CAPS.          PHARMA CURE P...   100.00 EGP (5.00/unit)
            FLOPADEX 8 MG 30 CAPSULES        EVA PHARMA         177.00 EGP (5.90/unit)
            SILDOCARE 8 MG 30 CAPS.          ANDALOUS PHARMA    177.00 EGP (5.90/unit)
            SYMPAPROST 8 MG 30 CAPS.         AL ESRAA PHAR...   177.00 EGP (5.90/unit)


LOWERS URINARY CYSTINE - PREVENTS THE NEXT STONE IN CYSTINURIA, NOT THIS ATTACK - give alongside
8. TIOPRONIN                                              [add-on - not a substitute]
   Adult    800 mg a day in three divided doses, on top of fluids and alkali. US label verbatim:
            "Adults: The recommended initial dosage in adult patients is 800 mg/day. In clinical
            studies, the average dosage was about 1,000 mg/day." and "Administer THIOLA EC in 3
            divided doses at the same times each day, with or without food. Maintain a routine
            pattern with regard to meals." The dose is then set by a urine test, verbatim: "Measure
            urinary cystine 1 month after starting THIOLA EC and every 3 months thereafter. Adjust
            THIOLA EC dosage to maintain urinary cystine concentration less than 250 mg/L." A
            patient who has had severe toxicity to penicillamine starts lower. - Indefinite, because
            cystinuria is a lifelong inherited transport defect. There is no course to finish - the
            review points are the three-monthly urinary cystine and the three- to six-monthly urine
            protein.
   Peds     15 mg/kg/day
            (Licensed from 20 kg, and cystinuria is one of the few stone
            diseases that starts in childhood. US label verbatim: "Pediatrics:
            The recommended initial dosage in pediatric patients weighing 20
            kg and greater is 15 mg/kg/day. Avoid dosages greater than 50
            mg/kg per day in pediatric patients", given in three divided
            doses. The reason for that ceiling is in the cautions: "Pediatric
            patients receiving greater than 50 mg/kg of tiopronin per day may
            be at increased risk for proteinuria." A child with a stone
            belongs with paediatric nephrology, not on a prescription written
            in a primary-care clinic.)
            Not for children under 20 kg
            20kg -> 300 mg/day  21kg -> 315 mg/day  22kg -> 330 mg/day  23kg -> 345 mg/day
            24kg -> 360 mg/day  25kg -> 375 mg/day  26kg -> 390 mg/day  27kg -> 405 mg/day
            28kg -> 420 mg/day  29kg -> 435 mg/day  30kg -> 450 mg/day  31kg -> 465 mg/day
            32kg -> 480 mg/day  33kg -> 495 mg/day  34kg -> 510 mg/day  35kg -> 525 mg/day
            36kg -> 540 mg/day  37kg -> 555 mg/day  38kg -> 570 mg/day  39kg -> 585 mg/day
            40kg -> 600 mg/day  41kg -> 615 mg/day  42kg -> 630 mg/day  43kg -> 645 mg/day
            44kg -> 660 mg/day  45kg -> 675 mg/day  46kg -> 690 mg/day  47kg -> 705 mg/day
            48kg -> 720 mg/day  49kg -> 735 mg/day  50kg -> 750 mg/day
   Source   THIOLA EC (tiopronin) delayed-release tablets US prescribing information, section 1
            Indications and Usage, section 2.1 Recommended Dosage, section 2.3 Monitoring and
            section 5 Warnings and Precautions (DailyMed SetID 20298a52-a194-a161-8632-d84b6f26e23c)
   Why      The disease article names the drug in its section on preventing the next stone by stone
            type: a cystine-stone former needs a large urine output, 3000 mL a day or more, and a
            urine pH kept at 7.5 or above so cystine stays dissolved; potassium citrate is the
            preferred alkaliniser, and tiopronin or another thiol drug lowers urinary cystine. The
            US label's licensed use covers the same disease and the same three supporting measures:
            it is indicated, combined with high fluid intake, alkali and diet change, for preventing
            cystine stones in adults and children 20 kg and over with severe homozygous cystinuria
            not controlled by those measures alone. Cystine stones make up roughly 1% of stones but
            recur relentlessly, present in childhood or adolescence, and resist lithotripsy. The row
            is marked adjunct and third line because it does nothing for the colic in front of you -
            the analgesics and tamsulosin on the card handle that. Egypt has no registered tiopronin
            product, so no local brand or price can be shown.
   Caution  It prevents the next stone; it does nothing for this one. The presentation here is acute
            renal colic. Tiopronin is a three-times-a-day lifelong drug started after the stone type
            is known - a cystine stone on analysis, or cystinuria on a 24-hour urine - and it does
            not belong in an emergency prescription.
            RED FLAG - proteinuria and nephrotic syndrome. US label verbatim: "Proteinuria,
            including nephrotic syndrome, and membranous nephropathy, have been reported with
            tiopronin use." and "Monitor patients for the development of proteinuria and discontinue
            therapy in patients who develop proteinuria." The label's schedule is verbatim: "Assess
            for proteinuria before treatment and every 3 to 6 months during treatment." A drug for
            kidney stones that can damage the kidney is not one to start and forget.
            The dose is titrated against a laboratory number, not against symptoms. US label
            verbatim: "Adjust THIOLA EC dosage to maintain urinary cystine concentration less than
            250 mg/L." Without access to urinary cystine measurement the dose cannot be managed
            properly, and that is a reason to refer rather than to guess.
            Hypersensitivity reactions. US label verbatim: "Hypersensitivity reactions (drug fever,
            rash, fever, arthralgia and lymphadenopathy) have been reported", and known
            hypersensitivity to tiopronin is a contraindication.
            The fluid and the alkali are not optional extras. The label indicates the drug only
            where it is combined with a high fluid intake, an alkali, and a change of diet - and the
            article sets the targets: urine output over 3000 mL a day and a urine pH of 7.5 or
            higher, with potassium citrate as the alkaliniser. A patient who will not drink will not
            be rescued by the tablet.
            No Egyptian product exists, so tiopronin cannot be filled at a Cairo pharmacy.
   Egypt    no Egyptian brand matched - prescribe by generic name

Prices are indicative (dataset snapshot 2026-06); verify with the pharmacy.
```

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