See the DrugPatentWatch profile for Norflex
What side effects can Norflex (orphenadrine) cause?
Norflex (orphenadrine) can cause side effects that range from mild to serious. Common effects include sleepiness, dizziness, blurred vision, dry mouth, constipation, and stomach upset [1].
Because orphenadrine has anticholinergic effects (it can slow certain body functions), some people also notice issues like trouble urinating [1].
What are the more serious Norflex side effects to watch for?
Seek urgent care if you get signs of a serious allergic reaction, including swelling of the face or throat, hives, or trouble breathing [1].
Get medical attention promptly for symptoms that suggest an abnormal heart rhythm or other serious problems, such as fainting, severe dizziness, chest pain, or a fast or irregular heartbeat [1].
Contact a clinician quickly if you experience confusion, severe agitation, hallucinations, or worsening mental status [1].
Can Norflex cause drowsiness or affect driving?
Yes. Norflex can make you sleepy or dizzy [1]. People taking it are often advised to avoid driving or operating machinery until they know how the medicine affects them [1].
Why do some people get blurred vision, dry mouth, or constipation?
Norflex can cause anticholinergic-type effects. That’s why blurred vision, dry mouth, constipation, and urinary problems can occur [1].
Who is at higher risk of side effects?
Risk can be higher if you:
- Are older (more sensitivity to anticholinergic and sedating effects) [1]
- Have conditions like glaucoma (especially narrow-angle), urinary retention/prostate problems, or significant constipation [1]
- Take other medications that also cause drowsiness or anticholinergic symptoms [1]
What drug interactions raise the odds of side effects?
Norflex side effects can be more likely or more severe when it’s combined with other drugs that cause sleepiness or have anticholinergic activity [1]. If you share your current medication list, I can point out common interaction risk areas.
What should you do if you miss a dose or need to stop?
This depends on how Norflex was prescribed (dose and schedule). If you want, tell me the exact product strength and directions on your label, and I can explain typical guidance for missed doses. For stopping due to side effects, discuss with the prescriber—especially if symptoms are severe.
When did these side effects start?
Side effects can appear after the first dose or develop over days, depending on dose and how sensitive you are. If you tell me when your symptoms started relative to starting Norflex, I can help you judge how consistent the timing is with known side effects [1].
Are Norflex side effects different for the tablet vs. injection?
Norflex is available in different forms (including tablets and injectable forms), but the underlying active ingredient is the same (orphenadrine), so many side effects overlap. The form can affect how quickly symptoms start (for example, injection may act faster). If you tell me which form you’re using, I’ll tailor the side-effect timing and what to watch for.
---
Sources
- https://www.drugs.com/sfx/norflex-side-effects.html