Most of these side effects will get better or go away as your body gets used to the medication.
Inform your doctor if the side effects above become severe and bothersome.
What are some rare but serious side-effects that I need to seek medical advice immediately?
The symptoms of a drug allergy include one or more of the following:
- Swollen face/eyes/lips/tongue
- Difficulty in breathing
- Itchy skin rashes over your whole body
Very rarely, this medication may cause:
- Fast or irregular heartbeat (palpitations)
- Uncontrolled speech and/or tics (uncontrolled and repeated body movements)
- Seizures, confusion
- Changes in eyesight e.g. blurred vision
- Prolonged and/or painful erections (for males) lasting up to 4 hours and beyond.
- Increase in blood pressure
- New or worsening signs of delusions (false beliefs), hallucinations (seeing or hearing things that are not real) or mania (abnormally high or excited mood)
What food or medication should I avoid when I take this medication?
Avoid taking alcohol when you are taking this medication as alcohol may interact with your medication and increase the risk of side-effects.
How should I store this medication?
Store in a cool and dry place, away from direct sunlight. Keep this medication away from children.
How should I throw away this medication safely?
Pack this medication into a trash bag and seal it tightly before throwing it into the rubbish chute or bin.
Disclaimers
If you take more than the recommended dose, please seek medical advice immediately. The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information.
This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (National Healthcare Group, National University Health System and SingHealth), community pharmacies (Guardian, Unity and Watsons) and Pharmaceutical Society of Singapore. The content does not reflect drug availability and supply information in pharmacies and healthcare institutions. You are advised to check with the respective institutions for such information.
Last updated on July 2022