Can you split a 150 mg Venlafaxine extended release tablet and use it as a 75 mg tablet?

Are they marked with a line on it ? This way it is easier to split the medication.
If not get a pill splitter so you can split them as close to the middle as possible.
You should always consult your doctor first.

no because the drug is time released you dont need to split the medicine you will get to much of it at one time.so in my opinion just take the whole thing .im dure the dr would agree with me

No, the capsules are extended release and cannot be split for this reason.

not if its exstended release you will get to much of the medication at one time.thats thats the whole point of exstended release to get the medicine over a period of time if you split it you break the exstended release and get to much of the meds at one time

never split extended release medicines especially when there is a warning on the bottle from the pharmacy that says, "do not chew or crush"

No, because, it's shell or skin is made to release the medicine during certain time.