You can show life insurance premium paid either as drawings or as investment as you think feasible.You can't show both together.
If you show it as investment.Following entry will be passed:
Life Insurance (Investment) Dr.
To Bank Cr.
If you show it as drawings.Following entry will be passed:
Drawings Dr.
To Bank Cr.
& no need to show vehicle & medical insurance as investment i.e. in balancesheet. The annual premium paid should be shown in P&L only because if nothing happens to your vehicle or health for which you have taken the policy then nothing will be paid under these policies i.e. they will lapse unlike life insurance policy where there is assured return at the end.