Have sinus headaches for about a week. Taking sinutabs with temporary relief. Constant drainage any recommendations for over-the-counter medicines?

Nasal irrigation. Nasal irrigation is safe and effective. 1/4 - 1/2 tsp pure sodium chloride (no additives) and 1/4 - 1/2 tsp baking soda (not baking powder) to 8 oz of body temperature distilled/previously boiled water, the solution is compatible with your nasal passages. Can use bulb or neti-pot or generic nasal irrigation kit to flush out nasal passages.
Not really. Over the counter decongestants and antihistamines can help with sinus headaches, but are limited. Prescription nasal steroid sprays are much more effective in a shorter period of time, and are also more effective in preventing recurrent sinus headaches due to allergy. If this is a recurring problem, you really need to get this evaluated by your physician.