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1. Co-Trimoxazole 960mg Tablets
2. Co-Trimoxazole 960mg Tablets

SUMMARY OF PRODUCT CHARACTERISTICS

1 NAME OF THE MEDICINAL PRODUCT

Co-trimoxazole 960 mg tablets

2 QUALITATIVE AND QUANTITATIVE COMPOSITION

Each tablet contains:

Sulfamethoxazole BP 800 mg

Trimethoprim BP 160 mg

Excipients: For full list of excipients, see Section 6.1

3 PHARMACEUTICAL FORM

White, uncoated, standard curvature , with one side breakline capsule shaped tablet. The tablet can be divided into equal doses.

4    CLINICAL PARTICULARS

4.1    Therapeutic indications

Co-trimoxazole tablets are indicated for the treatment of the following infections in adults

and adolescents when owing to sensitive organisms (see section 5.1):

Treatment and prevention of Pneumocystis jiroveci (P. carinii) pneumonitis Treatment and prophylaxis of toxoplasmosis Treatment of nocardiosis

The following infections may be treated with Co-trimoxazole tablets where there is bacterial evidence of sensitivity to Co-trimoxazole tablets and good reason to prefer the combination of antibiotics in Co-trimoxazole tablets to a single antibiotic:

Acute uncomplicated urinary tract infection

Acute otitis media

Acute exacerbation of chronic bronchitis

Consideration should be given to official guidance on the appropriate use of antibacterial agents.

4.2 Posology and method of administration

Posology

Standard dosage recommendations for acute infections.

Adults and adolescents over 12 years of age

This dosage approximates to 6 mg trimethoprim and 30 mg sulfamethoxazole per kilogram body weight per 24 hours.

Treatment should be continued until the patient has been symptom free for two days; the majority will require treatment for at least 5 days. If clinical improvement is not evident after 7 days' therapy, the patient should be reassessed.

As an alternative to Standard Dosage for acute uncomplicated lower urinary tract infections, short-term therapy of 1 to 3 days' duration has been shown to be effective.

Elderly patients:

See Special Warnings and Precautions for Use. Unless otherwise specified standard dosage applies.

Patients with Impaired hepatic function:

No data are available relating to dosage in patients with impaired hepatic function.

Special Dosage Recommendations

(Standard dosage applies unless otherwise specified).

Patients with Impaired renal function:

Adults and adolescents over 12 years: (no information is available for children under 12 years of age).

>30	STANDARD DOSAGE
15 to 30	Half the STANDARD DOSAGE
<15	Not recommended

Measurements of plasma concentration of sulfamethoxazole at intervals of 2 to 3 days are recommended in samples obtained 12 hours after administration of Co-trimoxazole tablets. If the concentration of total sulfamethoxazole exceeds 150 microgram/ml then treatment should be interrupted until the value falls below 120 microgram/ml.

Pneumocystis jiroveci (P. carinii) pneumonitis: Treatment: A higher dosage is recommended using 20 mg trimethoprim and 100 mg sulfamethoxazole per kg of body weight per day in two or more divided doses for two weeks. The aim is to obtain peak plasma or serum levels of trimethoprim of greater than or equal to 5 microgram/ml (verified in patients receiving 1-hour infusions of intravenous Co-trimoxazole tablets). (See 4.8 Undesirable Effects).

Prevention:

Adults: The following dose schedules may be used:

160 mg trimethoprim/800 mg sulfamethoxazole daily 7 days per week.

160 mg trimethoprim/800 mg sulfamethoxazole three times per week on alternative days.

320 mg trimethoprim/1600 mg sulfamethoxazole per day in two divided doses three times per week on alternative days.

Adolescents over 12 years of age

The following dose schedules may be used for the duration of the period at risk (see Standard dosage recommendations for acute infections subsection of 4.2):

-    Standard dosage taken in two divided doses, seven days per week

-    Standard dosage taken in two divided doses, three times per week on alternate days

-    Standard dosage taken in two divided doses, three times per week on consecutive days

-    Standard dosage taken as a single dose, three times per week on consecutive days

The daily dose given on a treatment day approximates to 150 mg trimethoprim/m²/day and 750 mg sulfamethoxazole/m2day. The total daily dose should not exceed 320 mg trimethoprim and 1600 mg sulfamethoxazole.

Nocardiosis: There is no consensus on the most appropriate dosage. Adult doses of 3 to 4 tablets daily for up to 3 months have been used

Toxoplasmosis: There is no consensus on the most appropriate dosage for the treatment or prophylaxis of this condition. The decision should be based on clinical experience. For prophylaxis, however, the dosages suggested for prevention of Pneumocystis jiroveci pneumonitis may be appropriate.

For oral use only.

It may be preferable to take Co-trimoxazole tablets with some food or drink to minimise the possibility of gastrointestinal disturbances.

4.3 Contraindications

Co-trimoxazole tablets are contraindicated in :

■    patients with a history of hypersensitivity to sulphonamides, trimethoprim, or any excipients of Co-trimoxazole tablets.

■    patients showing marked liver parenchymal damage.

■    patients with severe renal insufficiency where repeated measurements of the plasma concentration cannot be performed.

■    patients with porphyria.

Co-trimoxazole tablets should not be given to premature babies nor to full-term infants during the first 6 weeks of life except for the treatment/prophylaxis of PCP in infants 4 weeks of age or greater.(Please note however that Co-trimoxazole 160 mg/800 mg Tablets are not appropriate for children under 12 years old and under.)

4.4 Special warnings and precautions for use

Fatalities, although very rare, have occurred due to severe reactions including Stevens- Johnson syndrome, Lyell's syndrome (toxic epidermal necrolysis), fulminant hepatic necrosis, agranulocytosis, aplastic anaemia, other blood dyscrasias and hypersensitivity of the respiratory tract.

Life-threatening cutaneous reactions (Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN)) have been reported with the use of co-trimoxazole.

Patients should be advised of the signs and symptoms and monitored closely for skin reactions. The highest risk for occurrence of SJS or TEN is within the first weeks of treatment.

If symptoms or signs of SJS or TEN (e.g. progressive skin rash often with blisters or mucosal lesions) are present, co-trimoxazole treatment should be discontinued.

The best results in managing SJS and TEN come from early diagnosis and immediate discontinuation of any suspect drug. Early withdrawal is associated with a better prognosis.

If the patient has developed SJS or TEN with the use of sulfamethoxazole, sulfamethoxazole must not be re-started in this patient at any time.

The administration of Cotrimoxazole tablets to patients known or suspected to be at risk of

acute porphyria should be avoided. Both trimethoprim and sulphonamides (although not

specifically sulfamethoxazole) have been associated with clinical exacerbation of porphyria.

Except under careful supervision cotrimoxazole tablets should not be given to patients

with serious haematological disorders (see 4.8 Undesirable Effects).

Antibiotic-associated colitis and pseudomembranous colitis have been reported with cotrimoxazole and with nearly all other anti-bacterial agents and may range from mild to life-threatening in severity. It is important to consider this diagnosis in patients who develop diarrhoea during or after the use of cotrimoxazole (see section 4.8).

Discontinuation of therapy with cotrimoxazole and the administration of specific treatment for Clostridium difficile should be considered. Medicinal products that inhibit peristalsis should not be given.

Cotrimoxazole tablets should not be used in the treatment of streptococcal pharyngitis due

to Group A beta-haemolytic streptococci; eradication of these organisms from the oropharynx is less effective than with penicillin.

The combination of antibiotics in cotrimoxazole tablets should only be used where, in the

judgement of the physician, the benefits of treatment outweigh any possible risks; consideration should be given to the use of a single effective antibacterial agent.

Precautions

Particular care is always advisable when treating elderly patients because, as a group, they are more susceptible to adverse reactions and more likely to suffer serious effects as a result particularly when complicating conditions exist, e.g. impaired kidney and/or liver function and/or concomitant use of other drugs.

An adequate urinary output should be maintained at all times. Patients who are dehydrated may be at increased risk for the development of nephrotoxicity, crystalluria and nehrolithiasis. Evidence of crystalluria in vivo is rare, although sulphonamide crystals have been noted in cooled urine from treated patients. In patients suffering from malnutrition the risk may be increased.

Special Care should be exercised in treating elderly or susceptible folate deficient patients:

folate supplementation should be considered.

Regular monthly blood counts are advisable when cotrimoxazole tablets is given for long periods, or to folate deficient patients or to the elderly, since there exists a possibility of asymptomatic changes in haematological laboratory indices due to lack of available folate. These changes may be reversed by administration of folinic acid (5 to 10 mg/day) without interfering with the antibacterial activity.

In glucose-6-phosphate dehydrogenase (G-6-PD) deficient patients haemolysis may occur.

Cotrimoxazole tablets should be given with caution to patients with severe allergy or bronchial asthma.

Close monitoring of serum potassium and sodium is warranted in patients at risk of hyperkalaemia and hyponatraemia.

Other points

Trimethoprim has been noted to impair phenylalanine metabolism but this is of no significance in phenylketonuric patients on appropriate dietary restriction.

Cotrimoxazole tablets has been given to patients receiving cytotoxic therapy with little or no additional effect on the bone marrow or peripheral blood.

The combination of antibiotics in cotrimoxazole tablets should only be used where, in the judgement of the physician, the benefits of treatment outweigh any possible risks; consideration should be given to the use of a single effective antibacterial agent.

4.5 Interaction with other medicinal products and other forms of interaction

Trimethoprim may interfere with the estimation of serum/plasma creatinine when the alkaline picrate reaction is used. This may result in overestimation of serum/plasma creatinine of the order of 10%. The creatinine clearance is reduced: the renal tubular secretion of creatinine is decreased from 23% to 9% whilst the glomerular filtration remains unchanged.

In some situations, concomitant treatment with zidovudine may increase the risk of haematological adverse reactions to Co-trimoxazole (sulfmethoxazole and trimethoprim). If concomitant treatment is necessary, consideration should be given to monitoring of haematological parameters.

Reversible deterioration in renal function has been observed in patients treated with Co-trimoxazole (sulfamethoxazole and trimethoprim) and cyclosporin following renal transplantation.

Concurrent use of rifampicin and Co-trimoxazole tablets results in a shortening of the plasma half-life of trimethoprim after a period of about one week. This is not thought to be of clinical significance.

When trimethoprim is administered simultaneously with drugs that form cations at physiological pH, and are also partly excreted by active renal secretion (e.g. procainamide, amantadine), there is the possibility of competitive inhibition of this process which may lead to an increase in plasma concentration of one or both of the drugs.

In elderly patients concurrently receiving diuretics, mainly thiazides, there appears to be an increased risk of thrombocytopenia with or without purpura.

Occasional reports suggest that patients receiving pyrimethamine at doses in excess of 25 mg weekly may develop megaloblastic anaemia should Co-trimoxazole (sulfmethoxazole and trimethoprim) be prescribed concurrently.

Co-trimoxazole (sulfmethoxazole and trimethoprim) has been shown to potentiate the anticoagulant activity of warfarin via stereo-selective inhibition of its metabolism. Sulfamethoxazole may displace warfarin from plasma-albumin protein-binding sites in vitro. Careful control of the anticoagulant therapy during treatment with Co-trimoxazole tablets are advisable.

Co-trimoxazole (sulfmethoxazole and trimethoprim) prolongs the half-life of phenytoin and if co-administered could result in excessive phenytoin effect. Close monitoring of the patient's condition and serum phenytoin levels are advisable.

Co-trimoxazole (sulfmethoxazole and trimethoprim) prolongs the half-life of phenytoin and if co-administered could result in excessive phenytoin effect. Close monitoring of the patient's condition and serum phenytoin levels are advisable.

Concomitant use of trimethoprim with digoxin has been shown to increase plasma digoxin levels in a proportion of elderly patients.

Co-trimoxazole (sulfmethoxazole and trimethoprim) may increase the free plasma levels of methotrexate. Trimethoprim interferes with assays for serum methotrexate when dihydrofolate reductase from Lactobacillus casei is used in the assay. No interference occurs if methotrexate is measured by radioimmuno assay.

Administration of Co-trimoxazole (sulfmethoxazole / trimethoprim 800mg/160mg) causes a 40% increase in lamivudine exposure because of the trimethoprim component. Lamivudine has no effect on the pharmacokinetics of trimethoprim or sulfamethoxazole.

Interaction with sulphonylurea hypoglycaemic agents is uncommon but potentiation has been reported.

Caution should be exercised in patients taking any other drugs that can cause hyperkalaemia.

If Co-trimoxazole tablets is considered appropriate therapy in patients receiving other anti-folate drugs such as methotrexate, a folate supplement should be considered.

4.6 Fertility, pregnancy and lactation

Pregnancy

There are not any adequate data from the use of Co-trimoxazole tablets in pregnant women. Case-control studies have shown that there may be an association between exposure to folate antagonists and birth defects in humans.

Trimethoprim is a folate antagonist and, in animal studies, both agents have been shown to cause foetal abnormalities (see 5.3 Preclinical Safety Data). Co-trimoxazole tablets should not be used in pregnancy, particularly in the first trimester, unless clearly necessary. Folate supplementation should be considered if Co-trimoxazole tablets is used in pregnancy.

Sulfamethoxazole competes with bilirubin for binding to plasma albumin. As significantly maternally derived drug levels persist for several days in the newborn, there may be a risk of precipitating or exacerbating neonatal hyperbilirubinaemia, with an associated theoretical risk of kernicterus, when Co-trimoxazole tablets is administered to the mother near the time of delivery. This theoretical risk is particularly relevant in infants at increased risk of hyperbilirubinaemia, such as those who are preterm and those with glucose-6-phosphate dehydrogenase deficiency.

Lactation

The components of Co-trimoxazole tablets (sulfamethoxazole and trimethoprim) are excreted in breast milk. Administration of Co-trimoxazole tablets should be avoided in late pregnancy and in lactating mothers where the mother or infant has, or is at particular risk of developing, hyperbilirubinaemia. Additionally, administration of Co-trimoxazole tablets should be avoided in infants younger than eight weeks in view of the predisposition of young infants to hyperbilirubinaemia.

4.7 Effects on ability to drive and use machines

There have been no studies to investigate the effect of Co-trimoxazole on driving performance or the ability to operate machinery. However, there are some side effects (such as hallucination, dizziness, somnolence, and vertigo) associated with this product that may affect some patients’ ability to drive or operate machinery (see section 4.8).

4.8 Undesirable effects

As Co-trimoxazole contains trimethoprim and a sulphonamide the type and frequency of adverse reactions associated with such compounds are expected to be consistent with extensive historical experience.

Data from large published clinical trials were used to determine the frequency of very common to rare adverse events. Very rare adverse events were primarily determined from post-marketing experience data and therefore refer to reporting rate rather than a "true" frequency. In addition, adverse events may vary in their incidence depending on the indication.

The following convention has been used for the classification of adverse events in terms of frequency:- Very common >1/10, common >1/100 and <1/10, uncommon >1/1000 and <1/100, rare >1/10,000 and <1/1000, very rare <1/10,000.

Infections and Infestations
Common:	Monilial overgrowth
Blood and lymphatic system disorders
Very rare:	Leucopenia, neutropenia, thrombocytopenia, agranulocytosis, megaloblastic anaemia, aplastic anaemia, haemolytic anaemia, methaemoglobinaemia, eosinophilia, purpura, haemolysis in certain susceptible G-6-PD deficient patients
Immune system disorders
Very rare:	Serum sickness, anaphylaxis, allergic myocarditis, angioedema, drug fever, allergic vasculitis resembling Henoch-Schoenlein purpura, periarteritis nodosa, systemic lupus erythematosus
Metabolism and nutrition disorders
Very common:	Hyperkalaemia
Very rare:	Hypoglycaemia, hyponatraemia, anorexia
Psychiatric disorders
Very rare:	Depression, hallucinations
Nervous system disorders
Common:	Headache
Very rare:	Aseptic meningitis, convulsions, peripheral neuritis, ataxia, vertigo, tinnitus, dizziness
Aseptic meningitis was rapidly reversible on withdrawal of the drug, but recurred in a number of cases on re-exposure to either Co-trimoxazole (sulfmethoxazole and trimethoprim) or to trimethoprim alone.
Respiratory, thoracic and mediastinal disorders
Very rare:	Cough, shortness of breath, pulmonary infiltrates
Cough, shortness of breath and pulmonary infiltrates may be early indicators

of respiratory hypersensitivity which, while very rare, has been fatal.
Gastrointestinal disorders
Common:	Nausea, diarrhoea
Uncommon:	Vomiting
Very rare:	Glossitis, stomatitis, pseudomembranous colitis, pancreatitis
Eye Disorders
Very rare:	Uveitis
Hepatobiliary	disorders
Very rare:	Elevation of serum transaminases, elevation of bilirubin levels, cholestatic jaundice, hepatic necrosis
Cholestatic jaundice and hepatic necrosis may be fatal.
Skin and subcutaneous tissue disorders
Common:	Skin rashes
Very rare:	Photosensitivity, exfoliative dermatitis, fixed drug eruption, erythema multiforme, Stevens-Johnson syndrome, Lyell's syndrome (toxic epidermal necrolysis)
Lyell's syndrome carries a high mortality
Musculoskeletal and connective tissue disorders
Very rare:	Arthralgia, myalgia
Renal and urinary disorders
Very rare:	Impaired renal function (sometimes reported as renal failure), interstitial nephritis
Effects associated with Pneumocystis jiroveci (P.carinii) Pneumonitis (PCP) management
Very rare:	Severe hypersensitivity reactions, rash, fever, neutropenia, thrombocytopenia, raised liver enzymes, hyperkalaemia, hyponatraemia, rhabdomyolysis.

At the high dosages used for PCP management severe hypersensitivity reactions have been reported, necessitating cessation of therapy. If signs of bone marrow depression occur, the patient should be given calcium folinate supplementation (5-10 mg/day). Severe hypersensitivity reactions have been reported in PCP patients on re-exposure to Co-trimoxazole (sulfmethoxazole and trimethoprim), sometimes after a dosage interval of a few days. Rhabdomyolysis has been reported in HIV positive patients receiving

Co-trimoxazole (sulfmethoxazole and trimethoprim) for prophylaxis or treatment of PCP.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.

4.9 Overdose

Nausea, vomiting, dizziness and confusion are likely signs/symptoms of overdosage. Bone marrow depression has been reported in acute trimethoprim overdosage.

If vomiting has not occurred, induction of vomiting may be desirable. Gastric lavage may be useful, though absorption from the gastrointestinal tract is normally very rapid and complete within approximately two hours. This may not be the case in gross overdosage. Dependant on the status of renal function administration of fluids is recommended if urine output is low.

Both trimethoprim and active sulphamethoxazole are moderately dialysable by haemodialysis. Peritoneal dialysis is not effective.

5 PHARMACOLOGICAL PROPERTIES

5.1 Pharmacodynamic properties

Pharmacotherapeutic group: Combinations of sulfonamides and trimethoprim, incl. derivatives;,

ATC code: J01EE01

Mechanism of action

Co-trimoxazole tablets is an antibacterial drug composed of two active principles, sulfamethoxazole and trimethoprim. Sulfamethoxazole is a competitive inhibitor of dihydropteroate synthetase enzyme. Sulfamethoxazole competitively inhibits the utilisation of para-aminobenzoic acid (PABA) in the synthesis of dihydrofolate by the bacterial cell resulting in bacteriostasis. Trimethoprim binds to and reversibly inhibits bacterial dihydrofolate reductase (DHFR) and blocks the production of tetrahydrofolate. Depending on the conditions the effect may be bactericidal. Thus trimethoprim and sulfamethoxazole block two consecutive steps in the biosynthesis of purines and therefore nucleic acids essential to many bacteria. This action produces marked potentiation of activity in vitro between the two agents.

Mechanism of resistance

In vitro studies have shown that bacterial resistance can develop more slowly with both sulfamethoxazole and trimethoprim in combination that with either sulfamethoxazole or trimethoprim alone.

Resistance to sulfamethoxazole may occur by different mechanisms. Bacterial mutations cause an increase the concentration of PABA and thereby out-compete with sulfamethoxazole resulting in a reduction of the inhibitory effect on dihydropteroate synthetase enzyme. Another resistance mechanism is plasmid-mediated and results from production of an altered dihydropteroate synthetase enzyme, with reduced affinity for sulfamethoxazole compared to the wild-type enzyme.

Resistance to trimethoprim occurs through a plasmid-mediated mutation which results in production of an altered dihydrofolate reductase enzyme having a reduced affinity for trimethoprim compared to the wild-type enzyme.

Trimethoprim binds to plasmodial DHFR but less tightly than to bacterial enzyme. Its affinity for mammalian DHFR is some 50,000 times less than for the corresponding bacterial enzyme.

Many common pathogenic bacteria are susceptible in vitro to trimethoprim and sulfamethoxazole at concentrations well below those reached in blood, tissue fluids and urine after the administration of recommended doses. In common with other antibiotics, however, in vitro activity does not necessarily imply that clinical efficacy has been demonstrated and it must be noted that satisfactory susceptibility testing is achieved only with recommended media free from inhibitory substances, especially thymidine and thymine.

Breakpoints

EUCAST

S< 2 R> 4 S< 4 R> 4 S< 2 R> 4 S< 2 R> 4 S< 0.032 R> 1 S< 1 R> 2 S< 1 R> 2 S< 0.5 R> 1

S<0.5 R>1

Psuedomonas aeruginosa and other non-enterobacteriaceae: S< 2* R> 4*

S = susceptible, R = resistant. *These are CLSI breakpoints since no EUCAST breakpoints are currently available for these organisms.

Trimethoprim: sulfamethoxazole in the ratio 1:19. Breakpoints are expressed as trimethoprim concentration.

Antibacterial Spectrum

The prevalence of resistance may vary geographically and with time for selected species and local information on resistance is desirable, particularly when treating

5.2 Pharmacokinetic properties

After oral administration trimethoprim and sulfamethoxazole are rapidly and nearly completely absorbed. The presence of food does not appear to delay absorption. Peak levels in the blood occur between one and four hours after ingestion and the level attained is dose related. Effective levels persist in the blood for up to 24 hours after a therapeutic dose. Steady state levels in adults are reached after dosing for 2-3 days. Neither component has an appreciable effect on the concentrations achieved in the blood by the other.

Trimethoprim is a weak base with a pKa of 7.4. It is lipophilic. Tissue levels of trimethoprim are generally higher than corresponding plasma levels, the lungs and kidneys showing especially high concentrations. Trimethoprim concentrations exceed those in plasma in the case of bile, prostatic fluid and tissue, saliva, sputum and vaginal secretions. Levels in the aqueous humor, breast milk, cerebrospinal fluid, middle ear fluid, synovial fluid and tissue (intestinal) fluid are adequate for antibacterial activity. Trimethoprim passes into amniotic fluid and foetal tissues reaching concentrations approximating those of maternal serum.

Approximately 50% of Trimethoprim in the plasma is protein bound. The half life in man is in the range 8.6 to 17 hours in the presence of normal renal function. It is increased by a factor of 1.5 to 3.0 when the creatinine clearance is less than 10 ml/minute. There appears to be no significant difference in the elderly compared with young patients.

The principal route of excretion of trimethoprim is renal and approximately 50% of the dose is excreted in the urine within 24 hours as unchanged drug. Several metabolites have been identified in the urine. Urinary concentrations of Trimethoprim vary widely.

Sulfamethoxazole is a weak acid with a pKa of 6.0. The concentration of active sulfamethoxazole in a variety of body fluids is of the order of 20 to 50% of the plasma concentration.

Approximately 66% of sulfamethoxazole in the plasma is protein bound. The half-life in man is approximately 9 to 11 hours in the presence of normal renal function. There is no change in the half-life of active sulfamethoxazole with a reduction in renal function but there is prolongation of the half-life of the major, acetylated metabolite when the creatinine clearance is below 25 ml/minute.

The principal route of excretion of sulfamethoxazole is renal; between 15% and 30% of the dose recovered in the urine is in the active form. In elderly patients there is a reduced renal clearance of sulfamethoxazole.

5.3 Preclinical safety data Reproductive toxicology:

At doses in excess of recommended human therapeutic dose, Trimethoprim and sulfamethoxazole have been reported to cause cleft palate and other foetal abnormalities in rats, findings typical of a folate antagonist. Effects with trimethoprim were preventable by administration of dietary folate. In rabbits, foetal loss was seen at doses of trimethoprim in excess of human therapeutic doses.

6 PHARMACEUTICAL PARTICULARS

6.1 List of excipients

Docusate Sodium

Magnesium Stearate

Sodium Starch Glycolate (Type A)

Povidone (PVP k 30)

6.2 Incompatibilities

Not applicable.

6.3 Shelf life

24 months

6.4 Special precautions for storage

This medicinal product does not require any special storage conditions.

6.5 Nature and contents of container Blister pack

PVC/aluminum foil blister pack of 10, 14 -with and without calendar pack, 28 - with and without calendar pack, 30, 50, 100.

Not all pack sizes may be marketed

6.6 Special precautions for disposal

Trimethoprim interferes with assays for serum methotrexate when dihydrofolate reductase from Lactobacillus casei is used in the assay. No interference occurs if methotrexate is measured by radioimmuno assay.

Trimethoprim may interfere with the estimation of serum/plasma creatinine when the alkaline picrate reaction is used. This may result in overestimation of serum/plasma creatinine of the order of 10%. Functional inhibition of the renal tubular secretion of creatinine may produce a spurious fall in the estimated rate of creatinine clearance.

7    MARKETING AUTHORISATION HOLDER

DAWA Limited 5 Sandridge Close,

Harrow, Middlesex,

UK, HA1 1XD

8    MARKETING AUTHORISATION NUMBER(S)

PL 30684/0228

9    DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION

26/03/2015

10    DATE OF REVISION OF THE TEXT

26/03/2015