The literature on this medication does not mention anything about not taking it if you have asthma.
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There are 2 disease interactions with Flexeril (cyclobenzaprine):
Cyclobenzaprine (Includes Flexeril) ↔ Cardiovascular Disease
Severe Potential Hazard, Moderate plausibility
Applies to: Hyperthyroidism, Cardiovascular Disease, Cerebrovascular Insufficiency, History - Cerebrovascular Disease, History - Myocardial Infarction, Hypotension, Dehydration
The manufacturers consider the use of cyclobenzaprine to be contraindicated in the acute recovery phase following myocardial infarction and in patients with hyperthyroidism, congestive heart failure, arrhythmias, heart block, and/or conduction disturbances. Cyclobenzaprine is structurally related to the tricyclic antidepressants, which have been reported to cause tachycardia, arrhythmias, heart block, hypertension, hypotension (particularly orthostatic hypotension), thrombosis, thrombophlebitis, myocardial infarction, strokes, congestive heart failure, and ECG abnormalities such as PR and QT interval prolongation. Therapy with cyclobenzaprine should be administered cautiously in patients with a history of cardiovascular or cerebrovascular disease or a predisposition to hypotension, particularly if the intended dosage exceeds those normally used for musculoskeletal conditions. Tachycardia, arrhythmia, palpitation, and hypotension have been reported with the use of cyclobenzaprine in less than 1% of patients.
Cyclobenzaprine (Includes Flexeril) ↔ Anticholinergic Effects
Moderate Potential Hazard, Moderate plausibility
Applies to: Gastrointestinal Obstruction, Glaucoma/Intraocular Hypertension, Urinary Retention
Cyclobenzaprine has anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with cyclobenzaprine should be administered cautiously in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Glaucoma should be treated and under control prior to initiation of cyclobenzaprine therapy, and intraocular pressure monitored during therapy.
Hi I take flexeril also and I have had asthma for 28 years I'm 30 now and It has never caused any problems with me. As longs as your doc knows you have asthma and he gave you flexeril then he thinks it is ok, so try not to worry and if you take it and feel it's bothering you then call you doc right away. Hope this helps
- Flexeril Information for Consumers
- Flexeril Information for Healthcare Professionals (includes dosage details)
- Side Effects of Flexeril (detailed)
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