What fillers are safe after silicone injections?

I would suggest removing the silicone surgically and then proceed with correction of the lips with Juvederm or Restylane. Best, Dr. Karamanoukian#Realself100 Surgeon

It is not always advisable treating silicone overcorrection with additional silicone. Feel free to re-ask your question with photos of your lips, and a description of what you would like to achieve.Hope this helps.Dr Joseph

Regards, 
Liquid silicone is unsafe, please do not use it ever. The autoimmune response could be triggered by this substance, if you look around on th Internet, you will find patients that have a lot of problems with this product. The use for lips and other areas is off label. The inical use is for retine problems. 
The biopolymer or liquid silicone has to be removed from the lips, it is obligatory for your safety. So the ideal would be to remove the biopolymer and after a reasonable time, between six to eight months, you can fill the lips with Juvederm, not with Silicone 1000, because that is also liquid silicone, and it should not be used for filling the face, lips or body. In fact, it should not be used under any circumstances, it could be very dangerous.
Please remember to be aware, do not let any permanenrt filler to be injected into your face, breast, buttocks, calfs, genitalia, etc. The safest way to increase buttocks is through your own fat injections or through silicone implants.
I hope the information was usefull, have a nice day! Dr Carlos Alberto Ríos.

Additional fillers can be used, but there is always a risk that it may cause an inflammatory response with the permanent filler that has been previously placed.