This medication may initially cause flushing, dizziness, weakness, nausea, drowsiness, stiffness, or feelings of tingling, heat, fatigue. If any of these effects continue or become bothersome, inform your doctor. Tell your doctor immediately if any of these unlikely but serious side effects occur: seizures. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.
If you experience any of the following serious side effects, stop using sumatriptan and seek emergency medical attention:
an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
severe or prolonged chest pain or an irregular heartbeat;
chest, jaw, or neck pain or tightness;
sudden or severe stomach pain;
problems seeing; or
unusual weakness or numbness.
Other, less serious side effects may be more likely to occur. Continue to use sumatriptan and talk to your doctor if you experience
nausea;
drowsiness or dizziness;
tingling, flushing, warmth, redness, or heaviness of a body part;
unpleasant taste in the mouth (nasal spray);
nasal irritation (nasal spray); or
injection site discomfort (injection).
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Large doses of sumatripan (200 mg/day) can cause sulfhemoglobinemia, a rare condition in which the blood changes from red to greenish-black, due to the integration of sulfur into the hemoglobin molecule[2]. If sumatripan is discontinued, the condition reverses within a few weeks.
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This medication may initially cause flushing, dizziness, weakness, nausea, drowsiness, stiffness, or feelings of tingling, heat, fatigue. If any of these effects continue or become bothersome, inform your doctor. Tell your doctor immediately if any of these unlikely but serious side effects occur: seizures. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.
If you experience any of the following serious side effects, stop using sumatriptan and seek emergency medical attention:
an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
severe or prolonged chest pain or an irregular heartbeat;
chest, jaw, or neck pain or tightness;
sudden or severe stomach pain;
problems seeing; or
unusual weakness or numbness.
Other, less serious side effects may be more likely to occur. Continue to use sumatriptan and talk to your doctor if you experience
nausea;
drowsiness or dizziness;
tingling, flushing, warmth, redness, or heaviness of a body part;
unpleasant taste in the mouth (nasal spray);
nasal irritation (nasal spray); or
injection site discomfort (injection).
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Large doses of sumatripan (200 mg/day) can cause sulfhemoglobinemia, a rare condition in which the blood changes from red to greenish-black, due to the integration of sulfur into the hemoglobin molecule[2]. If sumatripan is discontinued, the condition reverses within a few weeks.
this is from wikipedia
Adverse Reactions
Injection:
Central nervous system: Dizziness (12%), warm/hot sensation (11%)
Local: Pain at injection site (59%)
Neuromuscular & skeletal: Paresthesia (14%)
Cardiovascular: Chest pain/tightness/heaviness/pressure (2% to 3%), hyper-/hypotension (1%)
Central nervous system: Burning (7%), feeling of heaviness (7%), flushing (7%), pressure sensation (7%), feeling of tightness (5%), drowsiness (3%), malaise/fatigue (1%), feeling strange (2%), headache (2%), tight feeling in head (2%), cold sensation (1%), anxiety (1%)
Gastrointestinal: Abdominal discomfort (1%), dysphagia (1%)
Neuromuscular & skeletal: Neck, throat, and jaw pain/tightness/pressure (2% to 5%), mouth/tongue discomfort (5%), weakness (5%), myalgia (2%); muscle cramps (1%), numbness (5%)
Ocular: Vision alterations (1%)
Respiratory: Throat discomfort (3%), nasal disorder/discomfort (2%)
Miscellaneous: Diaphoresis (2%)
Nasal spray:
>10%: Gastrointestinal: Bad taste (13% to 24%), nausea (11% to 13%), vomiting (11% to 13%)
Central nervous system: Dizziness (1% to 2%)
Respiratory: Nasal disorder/discomfort (2% to 4%), throat discomfort (1% to 2%)
Tablet:
Cardiovascular: Chest pain/tightness/heaviness/pressure (1% to 2%), hyper-/hypotension (1%), palpitation (1%), syncope (1%)
Central nervous system: Burning (1%), dizziness (>1%), drowsiness (>1%), malaise/fatigue (2% to 3%), headache (>1%), nonspecified pain (1% to 2%, placebo 1%), vertigo (<1% to 2%), migraine (>1%), sleepiness (>1%)
Gastrointestinal: Diarrhea (1%), nausea (>1%), vomiting (>1%), hyposalivation (>1%)
Genitourinary: Hematuria (1%)
Hematologic: Hemolytic anemia (1%)
Neuromuscular & skeletal: Neck, throat, and jaw pain/tightness/pressure (2% to 3%), paresthesia (3% to 5%), myalgia (1%), numbness (1%)
Otic: Ear hemorrhage (1%), hearing loss (1%), sensitivity to noise (1%), tinnitus (1%)
Respiratory: Allergic rhinitis (1%), dyspnea (1%), nasal inflammation (1%), nose/throat hemorrhage (1%), sinusitis (1%), upper respiratory inflammation (1%)
Miscellaneous: Hypersensitivity reactions (1%), nonspecified pressure/tightness/heaviness (1% to 3%, placebo 2%); warm/cold sensation (2% to 3%, placebo 2%)
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