Meridia may impair your ability to think or react. Be cautious if you are driving or doing anything else that requires you to be alert. Without consulting your doctor, do not use any other prescription or over-the-counter weight-loss products.

 Do not take cough, cold, or allergy medications while taking Meridia.

 Do not drink alcohol while taking Meridia.

Meridia side effects

Some common side effects of Meridia may include:

• constipation, stomach pain
• runny or stuffy nose, flu symptoms, sore throat, cough
• trouble sleeping (insomnia)
• dry mouth, upset stomach
• changes in appetite
• headache, back pain, joint pain
• feeling nervous, dizzy, or depressed
• redness, warmth, or shivering under your skin
• mild skin rash

Stop taking Meridia and call your doctor at once if you have a severe side effect such as:

• fast, pounding, or irregular heartbeats
• high fever, sweating, confusion, rigid muscles, feeling like you might pass out
• problems with vision, speech, or balance, sudden numbness or weakness (especially on one side of the body)
• new or worsening shortness of breath
• hallucinations, fever, tremor, agitation, overactive reflexes, nausea, vomiting, diarrhea, loss of coordination, dilated pupils;
• shoulder or arm pain, chest pain or heavy feeling, general ill feeling
• easy bruising or bleeding ( bleeding gums, nosebleeds, or any bleeding that will not stop)
• severe high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, seizure )

What drugs can interact with Meridia?

Some of the following medications can interact with Meridia and can deteriorate your health even more:

• Lithium
• Tryptophan 
• Ketoconazole
• Antibiotics 
• Antidepressants 
• Ergot medicine
• Medicines to treat migraine headache 
• Narcotic pain medication