|
Common IV To PO Conversions |
|||
|
Medication |
Bioavailability |
IV to PO Ratio |
Comments |
|
Acyclovir |
10 - 30% ¯ with dose |
NA |
See
IV/PO dosing for indication (not 1:1) |
|
Azithromycin |
34 - 52% |
1:1 |
IV
and PO dosing 250-500mg QD |
|
Bactrim |
90 - 100% |
1:1 |
5mL
(1 vial) = 1 SS Tab; 2 vials = DS tab |
|
Bumetanide |
85 -95% (72% 1 study) |
1:1 |
1mg
IV = 1mg PO (max oral = 10mg/day) |
|
Clindamycin |
90% |
1:1 |
MAX
oral dose is 450 q6h |
|
Cyclosporine |
10 - 89% (mean 30%) |
Variable |
IV
Dose essentially 33% of PO dose |
|
Digoxin |
60 - 80% |
NA |
¯ IV dose by 20-25% from PO
|
|
Famotidine |
20 - 66% |
1:1 |
20mg
IV = 20mg PO |
|
Fluconazole |
90% |
1:1 |
200mg
IV = 200mg PO |
|
Furosemide |
60 - 70% |
1:2 |
40mg
IV = 80mg PO (variable) |
|
Ganciclovir |
5% |
NA |
PO
Maintenance 1000mg TID IV
Treatment 5mg/kg q12 IV
Maintenance 5mg/kg QD ***See
Renal Dosing*** |
|
Haloperidol |
60% |
1:2 |
24mg
PO = 15mg IV |
|
Hydromorphone |
62% |
NA |
1.5-2mg
IM/SC = 6-7mg PO 8-10mg
IV = 40mg PO |
|
Labetolol |
25 - 40% |
NA |
Once
BP Controlled with IV therapy, switch to PO therapy at 200mg, then 200-400mg
6-12 hours later titrating to effect |
|
Levofloxacin |
99% |
1:1 |
500mg
IV = 500mg PO |
|
Levothyroxine |
48 - 80% |
1:2 |
Initial
IV dose is ½ previous oral dose |
|
Linezolid |
100% |
1:1 |
600mg
IV = 600mg PO |
|
Lorazepam |
100% |
1:1 |
1mg
IV = 1mg PO |
|
Metoclopramide |
50 - 80% |
1:1 |
Essentially
a 1:1 conversion; 10mg
IV =10mg PO |
|
Metoprolol |
50% |
1:2.5 |
10mg
IV q6h = 50mg PO BID |
|
Metronidazole |
100% |
1:1 |
500mg
IV = 500mg PO |
|
Morphine |
20 - 40% |
1:3-4 |
10mg
IM/SC = 30-40mg PO 4mg
IV = 12-16mg PO |
|
Phenytoin |
Variable |
1:1 |
100mg
IV = 100mg PO |
|
Rifampin |
90 - 95% |
1:1 |
600mg/day |
|
Tacrolimus |
14 - 32% |
1:3-4 |
Oral
Dose is 3-4 times IV dose IV
infusion: 0.03-0.05mg/kg/day PO
dose: 0.1-0.15mg/kg/day ¸ BID |
|
Valproic Acid |
90% |
1:1 |
Brand
Name DepaconÒ |