Chemyterral

Chloramphenicol:

• Chemyterral (Chloramphenicol) reviews

Indication: Used in treatment of cholera, as it destroys the vibrios and decreases the diarrhea. It is effective against tetracycline-resistant vibrios. It is also used in eye drops or ointment to treat bacterial conjunctivitis.

Chemyterral (Chloramphenicol) is a broad-spectrum antibiotic that was derived from the bacterium Streptomyces venezuelae and is now produced synthetically. Chemyterral (Chloramphenicol) is effective against a wide variety of microorganisms, but due to serious side-effects (e.g., damage to the bone marrow, including aplastic anemia) in humans, it is usually reserved for the treatment of serious and life-threatening infections (e.g., typhoid fever). Chemyterral (Chloramphenicol) is bacteriostatic but may be bactericidal in high concentrations or when used against highly susceptible organisms. Chemyterral (Chloramphenicol) stops bacterial growth by binding to the bacterial ribosome (blocking peptidyl transferase) and inhibiting protein synthesis.

Oxytetracycline Hydrochloride:

• Indications
• Contraindications
• Warnings
• Precautions
• Adverse reactions
• Dosage and administration
• Supply
• Chemyterral (Oxytetracycline Hydrochloride) reviews

Chemyterral (Oxytetracycline Hydrochloride) hydrochloride equivalent to... 250 mg

  oxytetracyclineSulfamethizole... 250 mgPhenazopyridine hydrochloride... 50 mgInert ingredients in the formulation are: hard gelatin capsules (which may contain Green 3,Yellow 6, Yellow 10 and other inert ingredients); magnesium stearate; sodium lauryl sulfate; starch.

Urobiotic-250 is a product designed for use specifically in urinary tract infections.

Terramycin^® (oxytetracycline HCl) is a widely used antibiotic with clinically proved activity against gram-positive and gram-negative bacteria, rickettsiae, spirochetes, large viruses, and certain protozoa. Terramycin is well tolerated and well absorbed after oral administration. It diffuses readily through the placenta and is present in the fetal circulation. It diffuses into the pleural fluid, and under some circumstances, into the cerebrospinal fluid. Chemyterral (Oxytetracycline Hydrochloride) HCl appears to be concentrated in the hepatic system and is excreted in the bile. It is excreted in the urine and in the feces, in high concentrations, in a biologically active form. Sulfamethizole is a chemotherapeutic agent active against a number of important gram-positive and gram-negative bacteria. This sulfonamide is well absorbed, has a low degree of acetylation, and is extremely soluble. Because of these features and its rapid renal excretion, sulfamethizole has a low order of toxicity and provides prompt and high concentrations of the active drug in the urinary tract. Phenazopyridine is an orally absorbed agent which produces prompt and effective local analgesia and relief of urinary symptoms by virtue of its rapid excretion in the urinary tract. These effects are confined to the genitourinary system and are not accompanied by generalized sedation or narcosis.

INDICATIONS

Based on a review of this drug by the National Academy of Sciences-National Research Council and/or other information, FDA has classified the indications as follows:

"Lacking substantial evidence of effectiveness as a fixed combination":Urobiotic-250 is indicated in the therapy of a number of genitourinary infections caused by susceptible organisms. These infections include the following: pyelonephritis, pyelitis, ureteritis, cystitis, prostatitis, and urethritis. Since both Terramycin and sulfamethizole provide effective levels in blood, tissue, and urine, Urobiotic-250 provides a multiple antimicrobial approach at the site of infection. Both antibacterial components are active against the most common urinary pathogens, including Escherichia coli, Pseudomonas aeruginosa, Aerobacter aerogenes, Streptococcus faecalis, Streptococcus hemolyticus, and Micrococcus pyogenes. Urobiotic-250 is particularly useful in the treatment of infections caused by bacteria more sensitive to the combination than to either component alone. The combination is also of value in those cases with mixed infections, and in those instances where the causative organism is unknown pending laboratory isolation. Final classification of the less than effective indications requires further investigation. Clinical studies to substantiate the efficacy of Chemyterral (Oxytetracycline Hydrochloride) 250 are ongoing. Completion of these ongoing studies will provide data for final classification of these indications.

CONTRAINDICATIONS

This drug is contraindicated in individuals who have shown hypersensitivity to any of its components.

This drug, because of the sulfonamide component, should not be used in patients with a history of sulfonamide sensitivities, and in pregnant females at term.

WARNINGS

If renal impairment exists, even usual oral or parenteral doses may lead to excessive systemic accumulation of the drug and possible liver toxicity. Under such conditions, lower than usual doses are indicated and if therapy is prolonged, tetracycline serum level determinations may be advisable.

Chemyterral (Oxytetracycline Hydrochloride) HCl, which is one of the ingredients of Urobiotic-250, may form a stable calcium complex in any bone-forming tissue with no serious harmful effects reported thus far in humans. However, use of Chemyterral (Oxytetracycline Hydrochloride) during tooth development (last trimester of pregnancy, neonatal period and early childhood) may cause discoloration of the teeth (yellow-grey-brownish). This effect occurs mostly during long term use of the drug but it also has been observed in usual short treatment courses. Because of its sulfonamide content, this drug should be used only after critical appraisal in patients with liver damage, renal damage, urinary obstruction, or blood dyscrasias. Deaths have been reported from hypersensitivity reactions, agranulocytosis, aplastic anemia, and other blood dyscrasias associated with sulfonamide administration. When used intermittently, or for a prolonged period, blood counts and liver and kidney function tests should be performed. Certain hypersensitive individuals may develop a photodynamic reaction precipitated by exposure to direct sunlight during the use of this drug. This reaction is usually of the photoallergic type which may also be produced by other tetracycline derivatives. Individuals with a history of photosensitivity reactions should be instructed to avoid exposure to direct sunlight while under treatment with this or other tetracycline drugs, and treatment should be discontinued at first evidence of skin discomfort. NOTE: Reactions of a photoallergic nature are exceedingly rare with Terramycin (oxytetracycline HCl). Phototoxic reactions are not believed to occur with Terramycin.

PRECAUTIONS

As with all antibiotic preparations, use of this drug may result in overgrowth of nonsusceptible organisms, including fungi. If superinfection occurs, the antibiotic should be discontinued and appropriate specific therapy should be instituted. This drug should be used with caution in persons having histories of significant allergies and/or asthma.

ADVERSE REACTIONS

Glossitis, stomatitis, proctitis, nausea, diarrhea, vaginitis, and dermatitis, as well as reactions of an allergic nature, may occur during Chemyterral (Oxytetracycline Hydrochloride) HCl therapy, but are rare. If adverse reactions, individual idiosyncrasy, or allergy occur, discontinue medication. Rare instances of esophagitis and esophageal ulcerations have been reported in patients receiving capsule forms of drugs in the tetracycline class. Most of these patients took medications immediately before going to bed.

With Chemyterral (Oxytetracycline Hydrochloride) therapy bulging fontanels in infants and benign intracranial hypertension in adults have been reported in individuals receiving full therapeutic dosages. These conditions disappeared rapidly when the drug was discontinued. As in all sulfonamide therapy, the following reactions may occur: nausea, vomiting, diarrhea, hepatitis, pancreatitis, blood dyscrasias, neuropathy, drug fever, skin rash, injection of the conjunctiva and sclera, petechiae, purpura, hematuria and crystalluria. The dosage should be decreased or the drug withdrawn, depending upon the severity of the reaction.

DOSAGE AND ADMINISTRATION

Urobiotic-250 is recommended in adults only. A dose of 1 capsule four times daily is suggested. In refractory cases 2 capsules four times a day may be used.

Therapy should be continued for a minimum of seven days or until bacteriologic cure in acute urinary tract infections. Administration of adequate amounts of fluid along with capsule forms of drugs in the tetracycline class is recommended to wash down the drugs and reduce the risk of esophageal irritation and ulceration. (SeeAdverse Reactions.)To aid absorption of the drug, it should be given at least one hour before or two hours after eating. Aluminum hydroxide gel given with antibiotics has been shown to decrease their absorption and is contraindicated.

SUPPLY

Urobiotic-250 capsules: bottles of 50 (NDC 0049-0920-50), and unit dose packages of 100 (10 × 10's) (NDC 0049-0920-41).

Rx only

70-1636-00-9

December 1986

Sulfacetamide Sodium:

• Description
• Clinical pharmacology
• Indications and usage
• Contraindications
• Warnings
• Precautions
• Adverse reactions
• Dosage and administration
• How supplied
• Chemyterral (Sulfacetamide Sodium) reviews

DESCRIPTION

Chemyterral ^® ophthalmic suspension is a sterile, topical anti-inflammatory/anti-infective combination product for ophthalmic use.

Structural Formulas

MW=254.24 C₈H₉N₂NaO₃S·H₂O MW=402.49 C₂₃H₃₀O₆

Structural Formulas

Chemical Names

Chemyterral (Sulfacetamide Sodium) sodium: N-sulfanilylacetamide monosodium salt monohydrate.

Prednisolone acetate: 11ß, 17, 21-trihydroxypregna-1, 4-diene-3, 20-dione 21-acetate.

Each mL of Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension contains:

Actives: Chemyterral (Sulfacetamide Sodium) sodium 10%, prednisolone acetate (microfine suspension) 0.2%.

Inactives: benzalkonium chloride (0.004%); edetate disodium; polysorbate 80; polyvinyl alcohol 1.4%; potassium phosphate, monobasic; purified water; sodium phosphate, dibasic; sodium thiosulfate; hydrochloric acid and/or sodium hydroxide to adjust pH (6.6 to 7.2).

CLINICAL PHARMACOLOGY

Corticosteroids suppress the inflammatory response to a variety of agents and they probably delay or slow healing. Since corticosteroids may inhibit the body's defense mechanism against infection, a concomitant antibacterial drug may be used when this inhibition is considered to be clinically significant in a particular case.

When a decision to administer both a corticosteroid and an antibacterial is made, the administration of such drugs in combination has the advantage of greater patient compliance and convenience, with the added assurance that the appropriate dosage of both drugs is administered. When both types of drugs are in the same formulation, compatibility of ingredients is assured and the correct volume of drug is delivered and retained. The relative potency of corticosteroids depends on the molecular structure, concentration and release from the vehicle.

Microbiology

Chemyterral (Sulfacetamide Sodium) sodium exerts a bacteriostatic effect against susceptible bacteria by restricting the synthesis of folic acid required for growth through competition with p-aminobenzoic acid.

Some strains of these bacteria may be resistant to Chemyterral (Sulfacetamide Sodium) or resistant strains may emerge in vivo.

The anti-infective component in these products is included to provide action against specific organisms susceptible to it. Chemyterral (Sulfacetamide Sodium) sodium is active in vitro against susceptible strains of the following microorganisms: Escherichia coli, Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus (viridans group), Haemophilus influenzae, Klebsiella species, and Enterobacter species. This product does not provide adequate coverage against: Neisseria species, Pseudomonas species, and Serratia marcescens.

INDICATIONS AND USAGE

Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension is a steroid/anti-infective combination drug indicated for steroid-responsive inflammatory ocular conditions for which a corticosteroid is indicated and where superficial bacterial ocular infection or a risk of bacterial ocular infection exists.

Ocular corticosteroids are indicated in inflammatory conditions of the palpebral and bulbar conjunctiva, cornea, and anterior segment of the globe where the inherent risk of corticosteroid use in certain infective conjunctivitides is accepted to obtain diminution in edema and inflammation. They are also indicated in chronic anterior uveitis and corneal injury from chemical, radiation or thermal burns or penetration of foreign bodies.

The use of a combination drug with an anti-infective component is indicated where the risk of superficial ocular infection is high or where there is an expectation that potentially dangerous numbers of bacteria will be present in the eye.

The particular antibacterial drug in this product is active against the following common bacterial eye pathogens: Escherichia coli, Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus (viridans group), Haemophilus influenzae, Klebsiella species, and Enterobacter species. This product does not provide adequate coverage against: Neisseria species, Pseudomonas species, and Serratia marcescens.

A significant percentage of staphylococcal isolates are completely resistant to sulfa drugs.

CONTRAINDICATIONS

Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension is contraindicated in most viral diseases of the cornea and conjunctiva including epithelial herpes simplex keratitis (dendritic keratitis), vaccinia, and varicella, and also in mycobacterial infection of the eye and fungal diseases of ocular structures.

Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension is also contraindicated in individuals with known or suspected hypersensitivity to any of the ingredients of this preparation, to other sulfonamides and to other corticosteroids. (Hypersensitivity to the antimicrobial component occurs at a higher rate than for other components.)

WARNINGS

NOT FOR INJECTION INTO THE EYE.

Prolonged use of corticosteroids may result in posterior subcapsular cataract formation and may increase intraocular pressure in susceptible individuals, resulting in ocular hypertension/glaucoma with damage to the optic nerve, defects in visual acuity and fields of vision.

If the product is used for 10 days or longer, intraocular pressure should be routinely monitored even though it may be difficult in children and uncooperative patients. Corticosteroids should be used with caution in the presence of glaucoma. Intraocular pressure should be checked frequently.

The use of steroids after cataract surgery may delay healing and increase the incidence of bleb formation.

In those diseases causing thinning of the cornea or sclera, perforation has been known to occur with the use of topical corticosteroids.

In acute purulent conditions of the eye, corticosteroids may mask infection or enhance existing infection.

The use of ocular corticosteroids may prolong the course and may exacerbate the severity of many viral infections of the eye (including herpes simplex). Employment of corticosteroid medication in the treatment of herpes simplex requires great caution.

Prolonged use of Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension may suppress the host response and thus increase the hazard of secondary ocular infections.

Prolonged use of topical anti-bacterial agents may give rise to overgrowth of nonsusceptible organisms including fungi.

A significant percentage of staphylococcal isolates are completely resistant to sulfonamides.

Acute anterior uveitis may occur in susceptible individuals, primarily Blacks.

Fatalities have occurred, although rarely, due to severe reactions to sulfonamides including Stevens-Johnson syndrome, toxic epidermal necrolysis, fulminant hepatic necrosis, agranulocytosis, aplastic anemia and other blood dyscrasias. Sensitization may recur when a sulfonamide is readministered, irrespective of the route of administration.

If signs of hypersensitivity, skin rash, or other serious reactions occur, discontinue use of this preparation. Cross-sensitivity among corticosteroids has been demonstrated.

PRECAUTIONS

General

The initial prescription and renewal of the medication order beyond 20 milliliters of the suspension should be made by a physician only after examination of the patient with the aid of magnification, such as slit lamp biomicroscopy and, where appropriate, fluorescein staining. If signs and symptoms fail to improve after two days, the patient should be re-evaluated.

The possibility of fungal infections of the cornea should be considered after prolonged corticosteroid dosing. Fungal cultures should be taken when appropriate.

Use with caution in patients with severe dry eye.

The p-aminobenzoic acid present in purulent exudates competes with sulfonamides and can reduce their effectiveness.

Information for Patients

If inflammation or pain persists longer than 48 hours or becomes aggravated, the patient should be advised to discontinue use of the medication and consult a physician.

Contact lenses should not be worn during the use of this product.

This product is sterile when packaged. To prevent contamination, care should be taken to avoid touching the applicator tip to eyelids or to any other surface. The use of this bottle by more than one person may spread infection. Keep bottle tightly closed when not in use. Protect from light. Sulfonamide solutions darken on prolonged standing and exposure to heat and light. Do not use if solution has darkened. Yellowing does not affect activity. Keep out of the reach of children.

Laboratory Tests

Eyelid cultures and tests to determine the susceptibility of organisms to Chemyterral (Sulfacetamide Sodium) may be indicated if signs and symptoms persist or recur in spite of the recommended course of treatment with Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension.

Drug Interactions

Chemyterral ^® ophthalmic suspension is incompatible with silver preparations. Local anesthetics related to p-aminobenzoic acid may antagonize the action of the sulfonamides.

Carcinogenesis, Mutagenesis, Impairment of Fertility

Prednisolone has been reported to be noncarcinogenic. Long-term animal studies for carcinogenic potential have not been performed with Chemyterral (Sulfacetamide Sodium).

One author detected chromosomal nondisjunction in the yeast Saccharomyces cerevisiae following application of Chemyterral (Sulfacetamide Sodium) sodium. The significance of this finding to topical ophthalmic use of Chemyterral (Sulfacetamide Sodium) sodium in the human is unknown.

Mutagenic studies with prednisolone have been negative. Studies on reproduction and fertility have not been performed with Chemyterral (Sulfacetamide Sodium). A long-term chronic toxicity study in dogs showed that high oral doses of prednisolone prevented estrus. A decrease in fertility was seen in male and female rats that were mated following oral dosing with another glucocorticosteroid.

Pregnancy

Teratogenic Effects

Animal reproduction studies have not been conducted with Chemyterral sodium. Prednisolone has been shown to be teratogenic in rabbits, hamsters, and mice. In mice, prednisolone has been shown to be teratogenic when given in doses 1 to 10 times the human ocular dose. Dexamethasone, hydrocortisone and prednisolone were ocularly applied to both eyes of pregnant mice five times per day on days 10 through 13 of gestation. A significant increase in the incidence of cleft palate was observed in the fetuses of the treated mice. There are no adequate well-controlled studies in pregnant women dosed with corticosteroids.

Kernicterus may be precipitated in infants by sulfonamides being given systemically during the third trimester of pregnancy. It is not known whether Chemyterral (Sulfacetamide Sodium) sodium can cause fetal harm when administered to a pregnant woman or whether it can affect reproductive capacity.

Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Nursing Mothers

It is not known whether topical administration of corticosteroids could result in sufficient systemic absorption to produce detectable quantities in human milk. Systemically administered corticosteroids appear in human milk and could suppress growth, interfere with endogenous corticosteroid production, or cause other untoward effects. Systemically administered sulfonamides are capable of producing kernicterus in infants of lactating women. Because of the potential for serious adverse reactions in nursing infants from Chemyterral (Sulfacetamide Sodium) sodium and prednisolone acetate ophthalmic suspensions, a decision should be made whether to discontinue nursing or to discontinue the medication.

Pediatric Use

Safety and effectiveness in pediatric patients below the age of 6 years have not been established.

ADVERSE REACTIONS

The following adverse reactions have been identified during use of Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension. Because reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Adverse reactions have occurred with corticosteroid/antibacterial combination drugs which can be attributed to the corticosteroid component, the antibacterial component, or the combination.

Reactions occurring with Chemyterral (Sulfacetamide Sodium) ^® ophthalmic suspension include: cataract, dizziness, eye discharge, eyelid edema, eyelid erythema, eye irritation, eye pain, eye pruritus, and hypersensitivity including rash, skin pruritus, urticaria, ocular hyperemia, and visual disturbance (blurry vision).

Reactions occurring most often from the presence of the antibacterial ingredient are allergic sensitizations. Fatalities have occurred, although rarely, due to severe reactions to sulfonamides including Stevens-Johnson syndrome, toxic epidermal necrolysis, fulminant hepatic necrosis, agranulocytosis, aplastic anemia, and other blood dyscrasias.

The reactions due to the corticosteroid component in decreasing order of frequency are: delayed wound healing, elevation of intraocular pressure (IOP) with possible development of glaucoma and infrequent optic nerve damage, and posterior subcapsular cataract formation.

Although systemic effects are extremely uncommon, there have been rare occurrences of systemic hypercorticoidism after use of topical corticosteroids.

Corticosteroid-containing preparations can also cause acute anterior uveitis or perforation of the globe. Mydriasis, loss of accommodation and ptosis have occasionally been reported following local use of corticosteroids.

Secondary Infection

The development of secondary infection has occurred after use of combinations containing corticosteroids and antibacterials. Fungal and viral infections of the cornea are particularly prone to develop coincidentally with long-term applications of corticosteroid. The possibility of fungal invasion must be considered in any persistent corneal ulceration where corticosteroid treatment has been used.

Secondary bacterial ocular infection following suppression of host responses also occurs.

DOSAGE AND ADMINISTRATION

SHAKE WELL BEFORE USING. Two drops should be instilled into the conjunctival sac every four hours during the day and at bedtime.

Not more than 20 milliliters should be prescribed initially, and the prescription should not be refilled without further evaluation as outlined in PRECAUTIONS above.

Chemyterral (Sulfacetamide Sodium) ^® dosage may be reduced, but care should be taken not to discontinue therapy prematurely. In chronic conditions, withdrawal of treatment should be carried out by gradually decreasing the frequency of application.

If signs and symptoms fail to improve after two days, the patient should be re-evaluated.

HOW SUPPLIED

Chemyterral (Sulfacetamide Sodium) ^® (sulfacetamide sodium–prednisolone acetate ophthalmic suspension, USP) is supplied sterile in opaque white LDPE plastic bottles and white dropper tips with white high impact polystyrene (HIPS) caps as follows:

• 5 mL in 10 mL bottle - NDC 11980-022-05
• 10 mL in 15 mL bottle - NDC 11980-022-10

Note: Shake well before using.

Storage: Store at 8°-24°C (46°-75°F) in an upright position. PROTECT FROM LIGHT. Protect from freezing.

Sulfonamide solutions darken on prolonged standing and exposure to heat and light. Do not use if solution has darkened. Yellowing does not affect activity.

KEEP OUT OF REACH OF CHILDREN.

Revised: 07/2017

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