Skip to Content


Generic name: carbachol
Dosage form: injection
Drug class: Ophthalmic glaucoma agents

Medically reviewed by Last updated on Aug 24, 2020.




Carbastat® (Carbachol Intraocular Solution, USP) 0.01% is a sterile balanced salt solution of carbachol for intraocular injection. The active ingredient is represented by the structural formula:

Established name: Carbachol

Chemical name: Ethanaminium, 2-[(aminocarbonyl)oxy]-N,N,N -trimethyl-, chloride.

Each mL contains: Active: Carbachol 0.01%.

Inactive: Sodium chloride 0.64%, potassium chloride 0.075%, calcium chloride dihydrate 0.048%, magnesium chloride hexahydrate 0.03%, sodium acetate trihydrate 0.39%, sodium citrate dihydrate 0.17%, sodium hydroxide and/or hydrochloric acid to adjust pH (5.0-7.5) and water for injection USP.

Carbastat - Clinical Pharmacology

Carbachol is a potent cholinergic (parasympathomimetic) agent which produces constriction of the iris and ciliary body resulting in reduction in intraocular pressure. The exact mechanism by which carbachol lowers intraocular pressure is not precisely known.

Indications and Usage for Carbastat

Intraocular use for obtaining miosis during surgery. In addition, Carbastat® (Carbachol Intraocular Solution USP) reduces the intensity of intraocular pressure elevation in the first 24 hours after cataract surgery.


Should not be used in those persons showing hypersensitivity to any of the components of this preparation.


For single-dose intraocular use only. Discard unused portion. Intraocular carbachol 0.01% should be used with caution in patients with acute cardiac failure, bronchial asthma, peptic ulcer, hyperthyroidism, G.I. spasm, urinary tract obstruction and Parkinson's disease.



Studies in animals to evaluate the carcinogenic potential have not been conducted.

Pregnancy: Category C.

There are no adequate and well controlled studies in pregnant women. Carbastat® should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Nursing Mothers

It is not known if this medication is excreted in breast milk. Exercise caution when administering to a nursing woman.

Pediatric Use

Safety and efficacy in pediatric patients have not been established.

Adverse Reactions


Corneal clouding, persistent bullous keratopathy, retinal detachment and postoperative iritis following cataract extraction have been reported.


Side effects such as flushing, sweating, epigastric distress, abdominal cramps, tightness in urinary bladder, and headache have been reported with topical or systemic application of carbachol.

Carbastat Dosage and Administration

Aseptically remove the sterile vial from the blister package by peeling the backing paper and dropping the vial onto a sterile tray. Withdraw the contents into a dry sterile syringe, and replace the needle with an atraumatic cannula prior to intraocular irrigation. No more than one-half milliliter should be gently instilled into the anterior chamber for the production of satisfactory miosis. It may be instilled before or after securing sutures. Miosis is usually maximal within two to five minutes after application.

How is Carbastat Supplied

Carbastat (Carbachol Intraocular Solution, USP) 0.01%

1.5 mL sterile glass vials in cartons of 12 (12 x 1.5 mL)

NDC 58768-735-12

Store at controlled room temperature 15°-30°C (59°-86°F).

Rx only

Manufactured by OMJ Pharmaceuticals, Inc.,

San Germán, P.R. 00683

for Novartis Ophthalmics

Duluth, GA 30097


March, 2001

carbachol injection, solution
Product Information
Product Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:58768-735
Route of Administration INTRAOCULAR DEA Schedule
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
Carbachol (Carbachol) Carbachol 0.1 mg in 1 mL
Inactive Ingredients
Ingredient Name Strength
calcium chloride dihydrate 0.481 mg in 1 mL
hydrochloric acid
magnesium chloride hexahydrate 0.3 mg in 1 mL
potassium chloride 0.75 mg in 1 mL
sodium acetate trihydrate 3.9 mg in 1 mL
Sodium chloride 6.4 mg in 1 mL
sodium citrate dihydrate 1.7 mg in 1 mL
sodium hydroxide
# Item Code Package Description
1 NDC:58768-735-12 12 VIAL, GLASS (12 VIAL) in 1 CARTON
1 1.5 mL (1.5 MILLILITER) in 1 VIAL, GLASS
Labeler - Novartis Ophthalmics
Novartis Ophthalmics

More about Carbastat (carbachol ophthalmic)

Consumer resources

Professional resources

Other brands

Related treatment guides