ABSORPTION RATES
TABLE 10-3 Rates of Absorption by Different Routes
| Route of Administration | Time Until Drug Takes Effect* |
| Topical | Hours to days |
| Oral | 30-90 min |
| Rectal | 5-30 min (unpredictable) |
| Subcutaneous injection | 15-30 min |
| Intramuscular injection | 10-20 min |
| Sublingual tablet | 3-5 min |
| Sublingual injection | 3 min |
| Inhalation | 3 min |
| Endotracheal | 3 min |
| Intravenous | 30-60 sec |
| Intracardiac | 15 sec |
'In a healthy person with normal perfusion.
REGIONAL ANALGESIAANESTHESIA IN LABOR AND DELIVERY
Table KM.
MIND-ALTERING SUBSTANCES
Major substances used by the public to alter mental states are compared in Table 10-5.
COMMON DRUGS
Table 10-6.