Could Tazorac/retinoids Weaken Healthy Collagen Production?

Topical retinoids, such as Tazorac, stimulate collagen production. This is one of the reasons they are used to treat fine line and for rejuvenation. It sounds like you are experiencing another common side effect--dryness. Be sure to use only a pea sized amount of the drug at bedtime and to apply a moisturizer twice daily. Good luck!

The side effect that you are describing is dryness from Tazorac.  Your skin may be too sensitive to use Retin-A or Tazorac.  While it is true that Retinoids increase collagen production in the skin, all too often they are drying.  Please add an oil free moisturizer and it should help alot.

Topical retinoid medications, such as tretinoin and Tazorac, have been clinically proven to build collagen under the skin. In one study, Tazorac was shown to improve fine lines and wrinkles and hyperpigmentation on the skin. The collagen produced is in the dermis, under the top epidermal layer of the skin. The "cracking" that you are describing seems more consistent with a change in the epidermis. This could be related to a variety of things, such as over-drying your skin with a retioid medication or even the products you are currently using. The broken blood vessels is a vascular problem, which is generally not affected by Tazorac. I would consult a dermatologist and review your skin care regimen. They will be able to provide insights into what exactly is happening with your skin.

It sounds like what is going on is dryness from the Tazorac.  It is not having an adverse affect on your collagen.  I would consider switching to a less intense topical retinoid and using a moisturizer regularly afterwards.   In the meantime, if you decide to use the Tazorac again, consider using in only two or three times per week at most.