What is a Generic Drug?
A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.
The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.
Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.
Osmolex ER (Amantadine)
Prescription Required
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Product Details
Description
Osmolex ER is a prescription drug used to manage movement disorders related to problems with dopamine transmission in the central nervous system (CNS). Your doctor may prescribe it to treat Parkinson's disease (PD) or drug-induced movement disorders called Extrapyramidal symptoms (EPS).
PD starts with small tremors and eventually progresses to more severe movement disorders that can include movements that are too fast or too slow.
EPS are caused by the long-term usage of antipsychotic medications for psychiatric conditions like bipolar disorder and schizophrenia.
Fact Table
Formula
C10H17N
License
US FDA
Bioavailability
86–90%
Legal status
Rx-only
Chemical Name
Amantadine
Elimination half-life
10–31 hours
Dosage (Strength)
129 mg, 193 mg, 258 mg
Pregnancy
Consult Doctor
Brands
Osmolex ER
Protein binding
67%
PubChem CID
2130
MedlinePlus
a682064
ChEBI
2618
ATC code
N04BB01
DrugBank
DB00915
KEGG
D07441
Routes of administration
By mouth
Directions
Take Osmolex ER exactly as prescribed by your doctor. The starting dosage is 129 mg by mouth once daily in the morning. It may be increased to 322 mg by mouth once daily.
Never break, crush, chew, or split Osmolex ER tablets, as it will break the time-release mechanism.
Ingredients
The active ingredient in Osmolex ER is amantadine.
Interactions
There are many drug-drug interactions with this medication. Tell your doctor and pharmacist if you are taking any of the following:
- Alcohol
- Alkalinizing Agents
- Amisulpride
- Anticholinergic Agents
- Aripiprazole
- Brivudine
- BuPROPion
- Carbonic Anhydrase Inhibitors
- Clozapine
- Erdafitinib
- Fluphenazine
- Glycopyrrolate
- Haloperidol
- Influenza vaccine
- Kava Kava
- Memantine
- Methotrimeprazine
- Methylphenidate
- Metoclopramide
- Quetiapine
- QuiNIDine
- Sulpiride
- Trimethoprim
- Ziprasidone
Cautions
This drug can cause extreme daytime sleepiness.
Use caution if you have a history of psychiatric illness or suicidal thoughts.
Do not stop taking this drug suddenly without speaking with your healthcare provider.
Side Effects
Common Osmolex ER side effects can include:
- Abnormal dreams
- Agitation
- Anorexia
- Anxiety
- Apathy
- Ataxia
- Benign prostatic hypertrophy
- Blurred vision
- Bruise
- Cataract
- Constipation
- Cough
- Decreased appetite
- Delusions
- Depression
- Diarrhea
- Dizziness
- Drowsiness
- Dry nose
- Falling
- Fatigue
- Hallucinations
- Headache
- Illusion
- Insomnia
- Irritability
- Joint swelling
- Muscle spasm
- Nausea
- Nervous
- Orthostatic hypotension
- Paranoia
- Peripheral edema
- Presyncope
- Suicidal ideation
- Urinary tract infection
- Vomiting
- Xerostomia
References
Osmolex ER. Bridgewater, NJ: Vertical Pharmaceuticals; February 2018.
IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.Product Code : 13618
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