Hypothyroid treatment drug has many side effects. Thyroid patients should check with your doctor immediately if any of these side effects occur when taking levothyroxine. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional. See below for a comprehensive list of adverse effects.

Side Effects of Hypothyroid Treatment Drug:
Major Side effects:
• Chest pain or discomfort
• Decreased urine output
• Difficult or labored breathing
• Difficulty with swallowing
• Dilated neck veins
• Extreme fatigue
• Fainting

• Fast, slow, irregular, pounding,
• or racing heartbeat or pulseFever
• Heat intolerance
• Hives or welts, skin itching, rash, or redness
• Irregular breathing
• Irritability
• Menstrual changes
• Nausea
• Pain or discomfort in the arms, jaw, back, or neck
• Sweating
• Swelling of the eyes, face, lips, throat, or tongue
• Tightness in the chest
• Tremors

Rare Side effects:
• Blurred or double vision
• Dizziness
• Eye pain
• Lack or slowing of normal growth in children
• Limp or walk favoring one leg
• Pain in the hip or knee
• Seizures
• Severe headache

• Symptoms of overdose
• Change in consciousness
• Cold, clammy skin
• Confusion
• Disorientation
• Fast or weak pulse
• Lightheadedness
• Loss of consciousness
• Sudden headache
• Sudden loss of coordination
• Sudden slurring of

• Minor Side Effects:
• Abdominal or stomach cramps
• Change in appetite
• Crying
• Diarrhea
• False or unusual sense of well-being
• Fear or nervousness

• Feeling not well or unhappy
• Feeling of discomfort
• Feeling of warmth
• Feeling things are not real
• Feelings of suspicion and distrust
• Hair loss

• Headache
• Hncreased appetite
• Mental depression
• Muscle weakness
• Quick to react or overreact emotionally
• Rapidly changing moods
• Redness of the face, neck, arms, and occasionally, upper chest
• Restlessness
• Trouble getting pregnant
• Trouble sitting still
• Unusual tiredness or weakness
• Vomiting
• Weight gain or loss.

 

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