Dermal filler injections can be administered in very little time. Once you have had a previous consultation with the physician and an appointment has been made, getting your dermal filler injection would only take an average of 15 to 30 minutes. Unlike Botox injections which may need about 2 weeks before the effects are seen, the face-lifting effects of dermal filler injections are seen right after the injection. You also are likely to experience slight swelling and sometimes, light bruising on your head.