July 4, 2015
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Imitrex

"Jan. 23, 2013 -- Worrying about what may trigger a migraine attack adds to the discomfort of many people with migraines. But according to a new study from Denmark, much of that worry may be unfounded.

The researchers studied the effect of l"...

Imitrex




Side Effects
Interactions

SIDE EFFECTS

The following serious adverse reactions are described below and elsewhere in the labeling:

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice.

Migraine Headache

Table 1 lists adverse reactions that occurred in 2 US placebo-controlled clinical trials in migraine patients (Studies 2 and 3) following either a single 6-mg dose of IMITREX Injection or placebo. Only reactions that occurred at a frequency of 2% or more in groups treated with IMITREX Injection 6 mg and that occurred at a frequency greater than the placebo group are included in Table 1.

Table 1. Adverse Reactions in Pooled Placebo-Controlled Trials in Patients with Migraine (Studies 2 and 3)

  IMITREX Injection 6 mg Subcutaneous
(n = 547) %
Placebo
(n = 370) %
Atypical sensations 42 9
  Tingling 14 3
  Warm/hot sensation 11 4
  Burning sensation 7 < 1
  Feeling of heaviness 7 1
  Pressure sensation 7 2
  Feeling of tightness 5 < 1
  Numbness 5 2
  Feeling strange 2 < 1
  Tight feeling in head 2 < 1
Cardiovascular
  Flushing 7 2
  Chest discomfort 5 1
  Tightness in chest 3 < 1
  Pressure in chest 2 < 1
 Ear, nose, and throat
  Throat discomfort 3 < 1
  Discomfort: nasal cavity/sinuses 2 < 1
Injection site reactiona 59 24
Miscellaneous
  Jaw discomfort 2 0
Musculoskeletal
  Weakness 5 < 1
  Neck pain/stiffness 5 < 1
  Myalgia 2 < 1
Neurological
  Dizziness/vertigo 12 4
  Drowsiness/sedation 3 2
  Headache 2 < 1
Skin
  Sweating 2 1
aIncludes injection site pain, stinging/burning, swelling, erythema, bruising, bleeding.

The incidence of adverse reactions in controlled clinical trials was not affected by gender or age of the patients. There were insufficient data to assess the impact of race on the incidence of adverse reactions.

Cluster Headache

In the controlled clinical trials assessing the efficacy of IMITREX Injection as a treatment for cluster headache (Studies 4 and 5), no new significant adverse reactions were detected that had not already been identified in trials of IMITREX in patients with migraine.

Overall, the frequency of adverse reactions reported in the trials of cluster headache was generally lower than in the migraine trials. Exceptions include reports of paresthesia (5% IMITREX, 0% placebo), nausea and vomiting (4% IMITREX, 0% placebo), and bronchospasm (1% IMITREX, 0% placebo).

Postmarketing Experience

The following adverse reactions have been identified during postapproval use of IMITREX Tablets, IMITREX Nasal Spray, and IMITREX Injection. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Cardiovascular

Hypotension, palpitations.

Neurological

Dystonia, tremor.

Read the Imitrex (sumatriptan succinate) Side Effects Center for a complete guide to possible side effects

DRUG INTERACTIONS

Ergot-containing Drugs

Ergot-containing drugs have been reported to cause prolonged vasospastic reactions. Because these effects may be additive, use of ergotamine-containing or ergot-type medications (like dihydroergotamine or methysergide) and IMITREX Injection within 24 hours of each other is contraindicated.

Monoamine Oxidase-A Inhibitors

MAO-A inhibitors increase systemic exposure by 2-fold. Therefore, the use of IMITREX Injection in patients receiving MAO-A inhibitors is contraindicated [see CLINICAL PHARMACOLOGY].

Other 5-HT1 Agonists

Because their vasospastic effects may be additive, co-administration of IMITREX Injection and other 5-HT1 agonists (e.g., triptans) within 24 hours of each other is contraindicated.

Selective Serotonin Reuptake Inhibitors/Serotonin Norepinephrine Reuptake Inhibitors And Serotonin Syndrome

Cases of serotonin syndrome have been reported during co-administration of triptans and SSRIs, SNRIs, TCAs, and MAO inhibitors [see WARNINGS AND PRECAUTIONS].

Last reviewed on RxList: 7/1/2015
This monograph has been modified to include the generic and brand name in many instances.

Side Effects
Interactions

Imitrex - User Reviews

Imitrex User Reviews

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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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