Nov 29, 18 · When the daily dose is increased, possible adverse effects include tachycardia, palpitation, urinary hesitancy or retention, blurred vision, dilatation of pupils, increased ocular tension, weakness, nausea, vomiting, headache, dizziness, constipation, drowsiness, hypersensitivity reactions, pruritus, hallucinations, agitation, tremor, gastric irritation, andNorflex (orphenadrine) Relaxes your muscles Flexeril (cyclobenzaprine) is widely used to treat muscle spasms and is available as a generic, but it shouldn't be used longterm Relaxes your muscles Norflex (orphenadrine) can be used for relaxing muscle spasms and it also can relieve pain Can relieve pain associated with muscle spasms100 mg 4/13/16 Email 3 MVAwhiplashNeck an trap pain Stomach hurts hr after I take it Increased appetite Dizzy,druggy feeling but can't go to sleep Given Norflex 100mg tabs every 12 hrs Had MVA 3 days ago Whiplash an concussion Neck an shoulder pain Has helped a little with neck pain Fee