Green top perferred, otherwise red top no gel.
red tube
Red
A lavender-top tube should be used to collect a fasting prolactin level sample.
A lavender/purple top tube is typically used for collecting blood specimens for phenobarbital level testing. This tube contains EDTA as an anticoagulant.
A green top tube (lithium heparin tube) is typically used to collect blood samples for lithium level testing.
A lavender top tube is typically used to collect blood samples for homocysteine level analysis.
A lavender-colored tube is typically used to collect blood samples for iron level testing.
A lavender or purple top tube is typically used to draw blood for a follicle-stimulating hormone (FSH) level.
Keppra is an anti-seizure medication and helps to prevent seizures.
It is for people who get seizures and is used to control them.
A green-top tube, containing lithium heparin, is typically used to collect blood for phosphorus level testing.
The color of the tube that is most often used for hematology CBC tests are