Methamphetamine blood test

Your doctor may order a blood test if you present with symptoms of methamphetamine overdose or abuse as a blood test is the most accurate testing method. Symptoms of methamphetamine overdose include:

• Rapid heartbeat 
• Psychosis
• Severe agitation and aggression 
• Irrational violence
• High blood pressure 
• Hyperactivity 
• Excessive sweating
• Dilated pupils
• High body temperature 

Apart from this, some workplaces may ask you to get this test done to ensure that you don’t do drugs. 

If you are already being treated for drug abuse, this test may be done from time to time to ensure that you are no longer using meth.

Signs of long-term methamphetamine abuse are:

• Severe weight loss
• Anxiety 
• Sleep problems
• Paranoia – extreme distrust of others
• Hallucinations – images and sensations that seem real but aren’t
• Intense itching 
• Dental problems, such as tooth decay
  
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There are no special preparations needed before this test. Tell your doctor if you are taking any routine medications or health supplements. 

A methamphetamine test is done on a blood sample. Your doctor or a nurse will draw the sample from a vein in your arm.

Most individuals do not report this process to be painful. However, the pain associated with this can be subjective. If you get anxious about needles, please talk to your doctor or nurse about it.

Normal results:

Methamphetamine level of <20 ng/mL (nanogram/millilitre) in blood is considered to be normal.

If the test results are normal or negative, then it means no methamphetamine has been detected in your blood. 

Abnormal results:

A methamphetamine level of >20 ng/mL in blood is said to be positive and indicates that the drug is present in the sample. Methamphetamine can stay in the blood for up to three days from the time of use and can be detected during this period.

Methamphetamine is converted to amphetamine in the body. The reference range for amphetamines, which includes methamphetamine, is as follows:

• 0.02-0.05 mg/L (milligrams per litre) and even up to 0.2 mg/L: Therapeutic use (if prescribed)
• >0.2 mg/L: Sign of use
• >2.5 mg/L: Indicative of toxicity and may be fatal

Please discuss your test results with your healthcare provider to understand what they mean for you. 

Disclaimer: All results must be clinically correlated with the patient’s complaints to make a complete and accurate diagnosis. The above information is provided from a purely educational point of view and is in no way a substitute for medical advice by a qualified doctor.