The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
Please note: These are common side effects reported by people who took amantadine immediate-release.
- Nausea (5-10%)
- Dizziness (5-10%)
- Trouble sleeping (5-10%)
Less Common Side Effects
- Depression, anxiety
- Feeling irritated, agitated, or confused
- Hallucinations
- Strange dreams
- Not feeling hungry
- Dry mouth or dry nose
- Constipation or diarrhea
- Feeling tired
- Headache
- Livedo reticularis (web-like purple-blue skin discoloration)
Osmolex ER serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Suicidal thoughts or behaviors
- Neuroleptic malignant syndrome (NMS): very high fevers, irregular pulse, sweating, muscle stiffness, confusion, changes in blood pressure
- Accidentally taking too much (overdose): death, fast heartbeat, difficulty breathing, decreased urination, stiff or rigid arms or legs, confusion
Source: DailyMed
The following Osmolex ER side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
More common
Bladder pain
bloody or cloudy urine
blurred vision
confusion
difficult, burning, or painful urination
dizziness or lightheadedness
fainting
falls
frequent urge to urinate
lower back or side pain
seeing, hearing, or feeling things that are not there
swelling of the hands, feet, or lower legs
Less common
Inability to move the eyes
increased blinking or spasms of the eyelid
sticking out of the tongue
trouble breathing, speaking, or swallowing
uncontrolled twisting movements of the neck, trunk, arms, or legs
unusual facial expressions
Rare
Chills
decreased vision or any change in vision
difficulty in coordination
increased blood pressure
increase in body movements
irritation and swelling of the eye
loss of memory
mental depression
seizures
severe mood or mental changes
skin rash
slurred speech
thoughts of suicide or attempts at suicide
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Agitation
difficulty concentrating
headache
irritability
loss of appetite
nervousness
nightmares
purplish red, net-like, or blotchy spots on the skin
trouble with sleeping
Less common
Blindness
blurred vision
decrease in sexual desire
decreased vision
drowsiness
dryness of the mouth, nose, and throat
false sense of well-being
joint swelling
unusual tiredness or weakness
vomiting
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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