Haritaki tablets benefits compared to haritaki capsules
Haritaki tablets are composed of haritaki powder that is pressed to form a tablet. This method has some disadvantages compared to haritaki capsules.
From my research it appears that capsules dissolve faster and better then tablets. Tablets sometimes require a filler to help them stay together and not disintegrate in the container that they come in. If you are still considering haritaki tablets after reading this report I strongly suggest that you read the contents label on the container so that you are aware of what the ingredients may be that bind the tablet together.
Dosage of Haritaki tablets
I recommend that you begin with one half tablet per day to see how your body responds to the haritaki. If you find that there no side effects such as runny stool or high energy at times that you do not want high energy then you can increase to one tablet a day after supper and before bedtime. Take this tablet with water or juice. Eveybody responds differently to foods, and this is the same with haritaki. Once you know that your body is responding well to the amount you are taking then you can increase the consumption. The ideal quantity is when you have a easy strong bowel movement in the morning. This indicates that the haritaki tablets benefits are working in your system and cleansing the whole body.

Binders in haritaki tablets
One of the most common binders is lactose. Here is more information on lactose:
Lactose (C12H22O11) is milk sugar. It is a disaccharide composed of one galactose and one glucose molecule. In the pharmaceutical industry, lactose is used to help form tablets because it has excellent compressibility properties. It is also used to form a diluent powder for dry-powder inhalations.
Lactose (Inactive Ingredient) – Drugs.com
You can order haritaki capsules from here
Tablet Research
https://www.ncbi.nlm.nih.gov/pubmed/17665854
The dissolution data were analyzed on the basis of zero, first order rate kinetics and Higuchi square root of time relationship. The results showed that the dissolution profiles were generally consistent with a first order rate kinetics (r = 0.95). The first order dissolution rate constants of capsules and tablets of the matrix granules only (without diluents) were 0.31 +/- 0.02 min(-1) and 0.20 +/- 0.03 min(-1), respectively, indicating faster dissolution from the capsules.