Carbachol is used for the treatment of glaucoma (increased pressure in the eyes).
It is also used to constrict the pupil of the eye during eye surgery.
Use this medicine exactly as directed by your doctor or according to the instructions on the label. Do not use more or less than instructed by your doctor.
Follow these steps:
1. Wash your hands thoroughly with soap and water before applying the drop.
2. Apply pressure to the inside corner of the eye (near your nose) using your fingers.
3. Slightly tilt your head back and instill in your eye the number of drops prescribed by your doctor.
4. Wipe any excess liquid from your face with a tissue. Excess liquid in your hands should be rinsed off immediately.
Try to use it at the same time each day.
This medicine must be used regularly for it to be effective. Continue using this medicine even when you feel better. Do not stop using it unless instructed by the doctor.
Apply the eye drop as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your normal dosing schedule.
DO NOT double a dose under any circumstances.
If you often forget to use your medicine, let your doctor and pharmacist know.
Alert your doctor if you have painful inflammation on the anterior chamber and iris of your eye as this medicine may not be suitable for you.
Inform your doctor if you have the following:
- corneal abrasion or painful scrape or scratch on the surface of the clear part of the eye
- stomach ulcer or stomach pain
- heart disease
- thyroid disease
- Parkinson's disease
- difficulty urinating/bladder problems
Let your doctor know if you are pregnant or breastfeeding.
You will need to have your eyes checked regularly to monitor the pressure in your eyes. It is important to keep all your appointments with your doctor.
Carbachol may cause any of the following side effects: headache, stomach pain, diarrhoea, vomiting, salivation, and difficulty urinating.
This medicine may also cause visual disturbances such as blurred vision, tearing, irritation, and sensation of something in the eye.
Some side effects may need immediate medical help. Alert your doctor quickly if you experience any of the following:
- abnormal or irregular heartbeat
- difficulty breathing
- redness and swelling of the eye tissues, pain, and eye discharge
Inform your doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Inform your doctor and pharmacist if you are taking any of these medicines:
- medicines used to treat dementia or memory loss e.g. donepezil, rivastigmine
- medicines used to treat high blood pressure
This list does not include all medicines that may interact with Carbachol.
Always notify your doctor and pharmacist if you are taking any other medicines, including herbal tonics, such as traditional Chinese medicine, supplements and medicines that you buy without a prescription.
Store in a cool, dry place away from the reach of children.
Medicines must not be used past the expiry date. Discard the eyedrops 1 month after opening or when you have completed the required number of days of treatment as directed by the doctor.