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Amantadine: What It Is and Why It Matters
Amantadine started out as a flu drug, but doctors found it also helps with Parkinson’s symptoms. That makes it a two‑in‑one medicine you’ll see in many treatment plans. If you’ve been prescribed amantadine or are just curious, this guide gives you the basics you need to know.
How to Take Amantadine Safely
First off, always follow your doctor’s instructions. The usual adult dose for flu prevention is 100 mg once a day, while the Parkinson’s dose often starts low (around 100 mg) and may be increased to 200 mg twice daily. Take the tablet with water; you can take it with food if it upsets your stomach.
Don’t skip doses without talking to a professional. If you miss one, take it as soon as you remember—unless it’s almost time for the next dose. In that case, just skip the missed one and keep your regular schedule. Stopping suddenly can cause a rebound of symptoms, especially for Parkinson’s patients.
Keep a list of every medicine you’re on, including over‑the‑counter pills and supplements. Amantadine can bump up the levels of other drugs, so your pharmacist or doctor needs the full picture.
Common Side Effects and What to Watch For
Most people handle amantadine without big problems, but some side effects are common. Light‑headedness, dry mouth, and trouble sleeping happen fairly often. If you feel a sudden change in mood, like anxiety or depression, let your doctor know right away.
Rarely, amantadine can affect the heart. Watch for fast or irregular beats, especially if you have a history of heart rhythm issues. Severe nausea, vomiting, or swelling of the legs should also be reported.
Because amantadine can change the way the kidneys process other drugs, people with kidney problems need a lower dose. Your doctor may check blood work periodically to make sure everything stays in range.
When it comes to interactions, amantadine can increase the effects of anticholinergic medicines and some blood pressure pills. It also interacts with other antiviral drugs, so be cautious if you’re on more than one infection‑related medication.
In short, treat amantadine like any other prescription: take the right amount, keep track of how you feel, and stay in touch with your healthcare team. With the right approach, it can be a useful tool for fighting flu and easing Parkinson’s symptoms.
Amantadine (2025 Guide): Uses, Dosage, Side Effects, Interactions & Brands
- By : Tamsin Riverton
- Date : Sep 9 2025
Clear 2025 guide to amantadine: what it treats now, how to dose it, key side effects, kidney adjustments, and the differences between Gocovri and Osmolex ER.